""" This is an object-oriented plotting library. A procedural interface is provided by the companion pyplot module, which may be imported directly, e.g.:: import matplotlib.pyplot as plt or using ipython:: ipython at your terminal, followed by:: In [1]: %matplotlib In [2]: import matplotlib.pyplot as plt at the ipython shell prompt. For the most part, direct use of the object-oriented library is encouraged when programming; pyplot is primarily for working interactively. The exceptions are the pyplot commands :func:`~matplotlib.pyplot.figure`, :func:`~matplotlib.pyplot.subplot`, :func:`~matplotlib.pyplot.subplots`, and :func:`~pyplot.savefig`, which can greatly simplify scripting. Modules include: :mod:`matplotlib.axes` defines the :class:`~matplotlib.axes.Axes` class. Most pylab commands are wrappers for :class:`~matplotlib.axes.Axes` methods. The axes module is the highest level of OO access to the library. :mod:`matplotlib.figure` defines the :class:`~matplotlib.figure.Figure` class. :mod:`matplotlib.artist` defines the :class:`~matplotlib.artist.Artist` base class for all classes that draw things. :mod:`matplotlib.lines` defines the :class:`~matplotlib.lines.Line2D` class for drawing lines and markers :mod:`matplotlib.patches` defines classes for drawing polygons :mod:`matplotlib.text` defines the :class:`~matplotlib.text.Text`, :class:`~matplotlib.text.TextWithDash`, and :class:`~matplotlib.text.Annotate` classes :mod:`matplotlib.image` defines the :class:`~matplotlib.image.AxesImage` and :class:`~matplotlib.image.FigureImage` classes :mod:`matplotlib.collections` classes for efficient drawing of groups of lines or polygons :mod:`matplotlib.colors` classes for interpreting color specifications and for making colormaps :mod:`matplotlib.cm` colormaps and the :class:`~matplotlib.image.ScalarMappable` mixin class for providing color mapping functionality to other classes :mod:`matplotlib.ticker` classes for calculating tick mark locations and for formatting tick labels :mod:`matplotlib.backends` a subpackage with modules for various gui libraries and output formats The base matplotlib namespace includes: :data:`~matplotlib.rcParams` a global dictionary of default configuration settings. It is initialized by code which may be overridded by a matplotlibrc file. :func:`~matplotlib.rc` a function for setting groups of rcParams values :func:`~matplotlib.use` a function for setting the matplotlib backend. If used, this function must be called immediately after importing matplotlib for the first time. In particular, it must be called **before** importing pylab (if pylab is imported). matplotlib was initially written by John D. Hunter (1968-2012) and is now developed and maintained by a host of others. Occasionally the internal documentation (python docstrings) will refer to MATLAB®, a registered trademark of The MathWorks, Inc. """ from __future__ import (absolute_import, division, print_function, unicode_literals) from matplotlib.externals import six import sys import distutils.version from itertools import chain import io import inspect import locale import os import re import tempfile import warnings import contextlib import distutils.sysconfig import functools # cbook must import matplotlib only within function # definitions, so it is safe to import from it here. from matplotlib.cbook import is_string_like, mplDeprecation, dedent, get_label from matplotlib.compat import subprocess from matplotlib.rcsetup import (defaultParams, validate_backend, cycler) import numpy from matplotlib.externals.six.moves.urllib.request import urlopen from matplotlib.externals.six.moves import reload_module as reload # Get the version from the _version.py versioneer file. For a git checkout, # this is computed based on the number of commits since the last tag. from ._version import get_versions __version__ = str(get_versions()['version']) del get_versions __version__numpy__ = str('1.6') # minimum required numpy version try: import dateutil except ImportError: raise ImportError("matplotlib requires dateutil") def compare_versions(a, b): "return True if a is greater than or equal to b" if a: if six.PY3: if isinstance(a, bytes): a = a.decode('ascii') if isinstance(b, bytes): b = b.decode('ascii') a = distutils.version.LooseVersion(a) b = distutils.version.LooseVersion(b) return a >= b else: return False if not compare_versions(six.__version__, '1.3'): raise ImportError( 'six 1.3 or later is required; you have %s' % ( six.__version__)) try: import pyparsing except ImportError: raise ImportError("matplotlib requires pyparsing") else: if not compare_versions(pyparsing.__version__, '1.5.6'): raise ImportError( "matplotlib requires pyparsing >= 1.5.6") # pyparsing 2.0.0 bug, but it may be patched in distributions try: f = pyparsing.Forward() f <<= pyparsing.Literal('a') bad_pyparsing = f is None except TypeError: bad_pyparsing = True # pyparsing 1.5.6 does not have <<= on the Forward class, but # pyparsing 2.0.0 and later will spew deprecation warnings if # using << instead. Additionally, the <<= in pyparsing 1.5.7 is # broken, since it doesn't return self. In order to support # pyparsing 1.5.6 and above with a common code base, this small # monkey patch is applied. if bad_pyparsing: def _forward_ilshift(self, other): self.__lshift__(other) return self pyparsing.Forward.__ilshift__ = _forward_ilshift if not hasattr(sys, 'argv'): # for modpython sys.argv = [str('modpython')] major, minor1, minor2, s, tmp = sys.version_info _python26 = (major == 2 and minor1 >= 6) or major >= 3 if not _python26: raise ImportError('matplotlib requires Python 2.6 or later') if not compare_versions(numpy.__version__, __version__numpy__): raise ImportError( 'numpy %s or later is required; you have %s' % ( __version__numpy__, numpy.__version__)) def _is_writable_dir(p): """ p is a string pointing to a putative writable dir -- return True p is such a string, else False """ try: p + '' # test is string like except TypeError: return False # Test whether the operating system thinks it's a writable directory. # Note that this check is necessary on Google App Engine, because the # subsequent check will succeed even though p may not be writable. if not os.access(p, os.W_OK) or not os.path.isdir(p): return False # Also test that it is actually possible to write to a file here. try: t = tempfile.TemporaryFile(dir=p) try: t.write(b'1') finally: t.close() except: return False return True class Verbose(object): """ A class to handle reporting. Set the fileo attribute to any file instance to handle the output. Default is sys.stdout """ levels = ('silent', 'helpful', 'debug', 'debug-annoying') vald = dict([(level, i) for i, level in enumerate(levels)]) # parse the verbosity from the command line; flags look like # --verbose-silent or --verbose-helpful _commandLineVerbose = None for arg in sys.argv[1:]: # cast to str because we are using unicode_literals, # and argv is always str if not arg.startswith(str('--verbose-')): continue level_str = arg[10:] # If it doesn't match one of ours, then don't even # bother noting it, we are just a 3rd-party library # to somebody else's script. if level_str in levels: _commandLineVerbose = level_str def __init__(self): self.set_level('silent') self.fileo = sys.stdout def set_level(self, level): 'set the verbosity to one of the Verbose.levels strings' if self._commandLineVerbose is not None: level = self._commandLineVerbose if level not in self.levels: warnings.warn('matplotlib: unrecognized --verbose-* string "%s".' ' Legal values are %s' % (level, self.levels)) else: self.level = level def set_fileo(self, fname): std = { 'sys.stdout': sys.stdout, 'sys.stderr': sys.stderr, } if fname in std: self.fileo = std[fname] else: try: fileo = open(fname, 'w') except IOError: raise ValueError('Verbose object could not open log file "{0}"' ' for writing.\nCheck your matplotlibrc ' 'verbose.fileo setting'.format(fname)) else: self.fileo = fileo def report(self, s, level='helpful'): """ print message s to self.fileo if self.level>=level. Return value indicates whether a message was issued """ if self.ge(level): print(s, file=self.fileo) return True return False def wrap(self, fmt, func, level='helpful', always=True): """ return a callable function that wraps func and reports it output through the verbose handler if current verbosity level is higher than level if always is True, the report will occur on every function call; otherwise only on the first time the function is called """ assert six.callable(func) def wrapper(*args, **kwargs): ret = func(*args, **kwargs) if (always or not wrapper._spoke): spoke = self.report(fmt % ret, level) if not wrapper._spoke: wrapper._spoke = spoke return ret wrapper._spoke = False wrapper.__doc__ = func.__doc__ return wrapper def ge(self, level): 'return true if self.level is >= level' return self.vald[self.level] >= self.vald[level] verbose = Verbose() def checkdep_dvipng(): try: s = subprocess.Popen(['dvipng', '-version'], stdout=subprocess.PIPE, stderr=subprocess.PIPE) stdout, stderr = s.communicate() line = stdout.decode('ascii').split('\n')[1] v = line.split()[-1] return v except (IndexError, ValueError, OSError): return None def checkdep_ghostscript(): if sys.platform == 'win32': gs_execs = ['gswin32c', 'gswin64c', 'gs'] else: gs_execs = ['gs'] for gs_exec in gs_execs: try: s = subprocess.Popen( [gs_exec, '--version'], stdout=subprocess.PIPE, stderr=subprocess.PIPE) stdout, stderr = s.communicate() if s.returncode == 0: v = stdout[:-1].decode('ascii') return gs_exec, v except (IndexError, ValueError, OSError): pass return None, None def checkdep_tex(): try: s = subprocess.Popen(['tex', '-version'], stdout=subprocess.PIPE, stderr=subprocess.PIPE) stdout, stderr = s.communicate() line = stdout.decode('ascii').split('\n')[0] pattern = '3\.1\d+' match = re.search(pattern, line) v = match.group(0) return v except (IndexError, ValueError, AttributeError, OSError): return None def checkdep_pdftops(): try: s = subprocess.Popen(['pdftops', '-v'], stdout=subprocess.PIPE, stderr=subprocess.PIPE) stdout, stderr = s.communicate() lines = stderr.decode('ascii').split('\n') for line in lines: if 'version' in line: v = line.split()[-1] return v except (IndexError, ValueError, UnboundLocalError, OSError): return None def checkdep_inkscape(): try: s = subprocess.Popen(['inkscape', '-V'], stdout=subprocess.PIPE, stderr=subprocess.PIPE) stdout, stderr = s.communicate() lines = stdout.decode('ascii').split('\n') for line in lines: if 'Inkscape' in line: v = line.split()[1] break return v except (IndexError, ValueError, UnboundLocalError, OSError): return None def checkdep_xmllint(): try: s = subprocess.Popen(['xmllint', '--version'], stdout=subprocess.PIPE, stderr=subprocess.PIPE) stdout, stderr = s.communicate() lines = stderr.decode('ascii').split('\n') for line in lines: if 'version' in line: v = line.split()[-1] break return v except (IndexError, ValueError, UnboundLocalError, OSError): return None def checkdep_ps_distiller(s): if not s: return False flag = True gs_req = '7.07' gs_sugg = '7.07' gs_exec, gs_v = checkdep_ghostscript() if compare_versions(gs_v, gs_sugg): pass elif compare_versions(gs_v, gs_req): verbose.report(('ghostscript-%s found. ghostscript-%s or later ' 'is recommended to use the ps.usedistiller option.') % (gs_v, gs_sugg)) else: flag = False warnings.warn(('matplotlibrc ps.usedistiller option can not be used ' 'unless ghostscript-%s or later is installed on your ' 'system') % gs_req) if s == 'xpdf': pdftops_req = '3.0' pdftops_req_alt = '0.9' # poppler version numbers, ugh pdftops_v = checkdep_pdftops() if compare_versions(pdftops_v, pdftops_req): pass elif (compare_versions(pdftops_v, pdftops_req_alt) and not compare_versions(pdftops_v, '1.0')): pass else: flag = False warnings.warn(('matplotlibrc ps.usedistiller can not be set to ' 'xpdf unless xpdf-%s or later is installed on ' 'your system') % pdftops_req) if flag: return s else: return False def checkdep_usetex(s): if not s: return False tex_req = '3.1415' gs_req = '7.07' gs_sugg = '7.07' dvipng_req = '1.5' flag = True tex_v = checkdep_tex() if compare_versions(tex_v, tex_req): pass else: flag = False warnings.warn(('matplotlibrc text.usetex option can not be used ' 'unless TeX-%s or later is ' 'installed on your system') % tex_req) dvipng_v = checkdep_dvipng() if compare_versions(dvipng_v, dvipng_req): pass else: flag = False warnings.warn('matplotlibrc text.usetex can not be used with *Agg ' 'backend unless dvipng-1.5 or later is ' 'installed on your system') gs_exec, gs_v = checkdep_ghostscript() if compare_versions(gs_v, gs_sugg): pass elif compare_versions(gs_v, gs_req): verbose.report(('ghostscript-%s found. ghostscript-%s or later is ' 'recommended for use with the text.usetex ' 'option.') % (gs_v, gs_sugg)) else: flag = False warnings.warn(('matplotlibrc text.usetex can not be used ' 'unless ghostscript-%s or later is ' 'installed on your system') % gs_req) return flag def _get_home(): """Find user's home directory if possible. Otherwise, returns None. :see: http://mail.python.org/pipermail/python-list/2005-February/325395.html """ try: if six.PY2 and sys.platform == 'win32': path = os.path.expanduser(b"~").decode(sys.getfilesystemencoding()) else: path = os.path.expanduser("~") except ImportError: # This happens on Google App Engine (pwd module is not present). pass else: if os.path.isdir(path): return path for evar in ('HOME', 'USERPROFILE', 'TMP'): path = os.environ.get(evar) if path is not None and os.path.isdir(path): return path return None def _create_tmp_config_dir(): """ If the config directory can not be created, create a temporary directory. Returns None if a writable temporary directory could not be created. """ import getpass import tempfile from matplotlib.cbook import mkdirs try: tempdir = tempfile.gettempdir() except NotImplementedError: # Some restricted platforms (such as Google App Engine) do not provide # gettempdir. return None tempdir = os.path.join(tempdir, 'matplotlib-%s' % getpass.getuser()) os.environ['MPLCONFIGDIR'] = tempdir mkdirs(tempdir) return tempdir get_home = verbose.wrap('$HOME=%s', _get_home, always=False) def _get_xdg_config_dir(): """ Returns the XDG configuration directory, according to the `XDG base directory spec `_. """ path = os.environ.get('XDG_CONFIG_HOME') if path is None: path = get_home() if path is not None: path = os.path.join(path, '.config') return path def _get_xdg_cache_dir(): """ Returns the XDG cache directory, according to the `XDG base directory spec `_. """ path = os.environ.get('XDG_CACHE_HOME') if path is None: path = get_home() if path is not None: path = os.path.join(path, '.cache') return path def _get_config_or_cache_dir(xdg_base): from matplotlib.cbook import mkdirs configdir = os.environ.get('MPLCONFIGDIR') if configdir is not None: configdir = os.path.abspath(configdir) if not os.path.exists(configdir): mkdirs(configdir) if not _is_writable_dir(configdir): return _create_tmp_config_dir() return configdir p = None h = get_home() if h is not None: p = os.path.join(h, '.matplotlib') if (sys.platform.startswith('linux') and xdg_base): p = os.path.join(xdg_base, 'matplotlib') if p is not None: if os.path.exists(p): if _is_writable_dir(p): return p else: try: mkdirs(p) except OSError: pass else: return p return _create_tmp_config_dir() def _get_configdir(): """ Return the string representing the configuration directory. The directory is chosen as follows: 1. If the MPLCONFIGDIR environment variable is supplied, choose that. 2a. On Linux, if `$HOME/.matplotlib` exists, choose that, but warn that that is the old location. Barring that, follow the XDG specification and look first in `$XDG_CONFIG_HOME`, if defined, or `$HOME/.config`. 2b. On other platforms, choose `$HOME/.matplotlib`. 3. If the chosen directory exists and is writable, use that as the configuration directory. 4. If possible, create a temporary directory, and use it as the configuration directory. 5. A writable directory could not be found or created; return None. """ return _get_config_or_cache_dir(_get_xdg_config_dir()) get_configdir = verbose.wrap('CONFIGDIR=%s', _get_configdir, always=False) def _get_cachedir(): """ Return the location of the cache directory. The procedure used to find the directory is the same as for _get_config_dir, except using `$XDG_CACHE_HOME`/`~/.cache` instead. """ return _get_config_or_cache_dir(_get_xdg_cache_dir()) get_cachedir = verbose.wrap('CACHEDIR=%s', _get_cachedir, always=False) def _decode_filesystem_path(path): if isinstance(path, bytes): return path.decode(sys.getfilesystemencoding()) else: return path def _get_data_path(): 'get the path to matplotlib data' if 'MATPLOTLIBDATA' in os.environ: path = os.environ['MATPLOTLIBDATA'] if not os.path.isdir(path): raise RuntimeError('Path in environment MATPLOTLIBDATA not a ' 'directory') return path _file = _decode_filesystem_path(__file__) path = os.sep.join([os.path.dirname(_file), 'mpl-data']) if os.path.isdir(path): return path # setuptools' namespace_packages may highjack this init file # so need to try something known to be in matplotlib, not basemap import matplotlib.afm _file = _decode_filesystem_path(matplotlib.afm.__file__) path = os.sep.join([os.path.dirname(_file), 'mpl-data']) if os.path.isdir(path): return path # py2exe zips pure python, so still need special check if getattr(sys, 'frozen', None): exe_path = os.path.dirname(_decode_filesystem_path(sys.executable)) path = os.path.join(exe_path, 'mpl-data') if os.path.isdir(path): return path # Try again assuming we need to step up one more directory path = os.path.join(os.path.split(exe_path)[0], 'mpl-data') if os.path.isdir(path): return path # Try again assuming sys.path[0] is a dir not a exe path = os.path.join(sys.path[0], 'mpl-data') if os.path.isdir(path): return path raise RuntimeError('Could not find the matplotlib data files') def _get_data_path_cached(): if defaultParams['datapath'][0] is None: defaultParams['datapath'][0] = _get_data_path() return defaultParams['datapath'][0] get_data_path = verbose.wrap('matplotlib data path %s', _get_data_path_cached, always=False) def get_example_data(fname): """ get_example_data is deprecated -- use matplotlib.cbook.get_sample_data instead """ raise NotImplementedError('get_example_data is deprecated -- use ' 'matplotlib.cbook.get_sample_data instead') def get_py2exe_datafiles(): datapath = get_data_path() _, tail = os.path.split(datapath) d = {} for root, _, files in os.walk(datapath): # Need to explicitly remove cocoa_agg files or py2exe complains # NOTE I dont know why, but do as previous version if 'Matplotlib.nib' in files: files.remove('Matplotlib.nib') files = [os.path.join(root, filename) for filename in files] root = root.replace(tail, 'mpl-data') root = root[root.index('mpl-data'):] d[root] = files return list(d.items()) def matplotlib_fname(): """ Get the location of the config file. The file location is determined in the following order - `$PWD/matplotlibrc` - `$MATPLOTLIBRC/matplotlibrc` - `$MPLCONFIGDIR/matplotlibrc` - On Linux, - `$HOME/.matplotlib/matplotlibrc`, if it exists - or `$XDG_CONFIG_HOME/matplotlib/matplotlibrc` (if $XDG_CONFIG_HOME is defined) - or `$HOME/.config/matplotlib/matplotlibrc` (if $XDG_CONFIG_HOME is not defined) - On other platforms, - `$HOME/.matplotlib/matplotlibrc` if `$HOME` is defined. - Lastly, it looks in `$MATPLOTLIBDATA/matplotlibrc` for a system-defined copy. """ if six.PY2: cwd = os.getcwdu() else: cwd = os.getcwd() fname = os.path.join(cwd, 'matplotlibrc') if os.path.exists(fname): return fname if 'MATPLOTLIBRC' in os.environ: path = os.environ['MATPLOTLIBRC'] if os.path.exists(path): fname = os.path.join(path, 'matplotlibrc') if os.path.exists(fname): return fname configdir = _get_configdir() if configdir is not None: fname = os.path.join(configdir, 'matplotlibrc') if os.path.exists(fname): home = get_home() if (sys.platform.startswith('linux') and home is not None and os.path.exists(os.path.join( home, '.matplotlib', 'matplotlibrc'))): warnings.warn( "Found matplotlib configuration in ~/.matplotlib/. " "To conform with the XDG base directory standard, " "this configuration location has been deprecated " "on Linux, and the new location is now %s/matplotlib/. " "Please move your configuration there to ensure that " "matplotlib will continue to find it in the future." % _get_xdg_config_dir()) return os.path.join( home, '.matplotlib', 'matplotlibrc') return fname path = get_data_path() # guaranteed to exist or raise fname = os.path.join(path, 'matplotlibrc') if not os.path.exists(fname): warnings.warn('Could not find matplotlibrc; using defaults') return fname # names of keys to deprecate # the values are a tuple of (new_name, f_old_2_new, f_new_2_old) # the inverse function may be `None` _deprecated_map = { 'text.fontstyle': ('font.style', lambda x: x, None), 'text.fontangle': ('font.style', lambda x: x, None), 'text.fontvariant': ('font.variant', lambda x: x, None), 'text.fontweight': ('font.weight', lambda x: x, None), 'text.fontsize': ('font.size', lambda x: x, None), 'tick.size': ('tick.major.size', lambda x: x, None), 'svg.embed_char_paths': ('svg.fonttype', lambda x: "path" if x else "none", None), 'savefig.extension': ('savefig.format', lambda x: x, None), 'axes.color_cycle': ('axes.prop_cycle', lambda x: cycler('color', x), lambda x: [c.get('color', None) for c in x]), } _deprecated_ignore_map = { } _obsolete_set = set(['tk.pythoninspect', ]) _all_deprecated = set(chain(_deprecated_ignore_map, _deprecated_map, _obsolete_set)) class RcParams(dict): """ A dictionary object including validation validating functions are defined and associated with rc parameters in :mod:`matplotlib.rcsetup` """ validate = dict((key, converter) for key, (default, converter) in six.iteritems(defaultParams) if key not in _all_deprecated) msg_depr = "%s is deprecated and replaced with %s; please use the latter." msg_depr_ignore = "%s is deprecated and ignored. Use %s" # validate values on the way in def __init__(self, *args, **kwargs): for k, v in six.iteritems(dict(*args, **kwargs)): self[k] = v def __setitem__(self, key, val): try: if key in _deprecated_map: alt_key, alt_val, inverse_alt = _deprecated_map[key] warnings.warn(self.msg_depr % (key, alt_key)) key = alt_key val = alt_val(val) elif key in _deprecated_ignore_map: alt = _deprecated_ignore_map[key] warnings.warn(self.msg_depr_ignore % (key, alt)) return try: cval = self.validate[key](val) except ValueError as ve: raise ValueError("Key %s: %s" % (key, str(ve))) dict.__setitem__(self, key, cval) except KeyError: raise KeyError('%s is not a valid rc parameter.\ See rcParams.keys() for a list of valid parameters.' % (key,)) def __getitem__(self, key): inverse_alt = None if key in _deprecated_map: alt_key, alt_val, inverse_alt = _deprecated_map[key] warnings.warn(self.msg_depr % (key, alt_key)) key = alt_key elif key in _deprecated_ignore_map: alt = _deprecated_ignore_map[key] warnings.warn(self.msg_depr_ignore % (key, alt)) key = alt val = dict.__getitem__(self, key) if inverse_alt is not None: return inverse_alt(val) else: return val # http://stackoverflow.com/questions/2390827 # (how-to-properly-subclass-dict-and-override-get-set) # the default dict `update` does not use __setitem__ # so rcParams.update(...) (such as in seaborn) side-steps # all of the validation over-ride update to force # through __setitem__ def update(self, *args, **kwargs): for k, v in six.iteritems(dict(*args, **kwargs)): self[k] = v def __repr__(self): import pprint class_name = self.__class__.__name__ indent = len(class_name) + 1 repr_split = pprint.pformat(dict(self), indent=1, width=80 - indent).split('\n') repr_indented = ('\n' + ' ' * indent).join(repr_split) return '{0}({1})'.format(class_name, repr_indented) def __str__(self): return '\n'.join('{0}: {1}'.format(k, v) for k, v in sorted(self.items())) def keys(self): """ Return sorted list of keys. """ k = list(dict.keys(self)) k.sort() return k def values(self): """ Return values in order of sorted keys. """ return [self[k] for k in self.keys()] def find_all(self, pattern): """ Return the subset of this RcParams dictionary whose keys match, using :func:`re.search`, the given ``pattern``. .. note:: Changes to the returned dictionary are *not* propagated to the parent RcParams dictionary. """ import re pattern_re = re.compile(pattern) return RcParams((key, value) for key, value in self.items() if pattern_re.search(key)) def rc_params(fail_on_error=False): """Return a :class:`matplotlib.RcParams` instance from the default matplotlib rc file. """ fname = matplotlib_fname() if not os.path.exists(fname): # this should never happen, default in mpl-data should always be found message = 'could not find rc file; returning defaults' ret = RcParams([(key, default) for key, (default, _) in six.iteritems(defaultParams) if key not in _all_deprecated]) warnings.warn(message) return ret return rc_params_from_file(fname, fail_on_error) URL_REGEX = re.compile(r'http://|https://|ftp://|file://|file:\\') def is_url(filename): """Return True if string is an http, ftp, or file URL path.""" return URL_REGEX.match(filename) is not None def _url_lines(f): # Compatibility for urlopen in python 3, which yields bytes. for line in f: yield line.decode('utf8') @contextlib.contextmanager def _open_file_or_url(fname): if is_url(fname): f = urlopen(fname) yield _url_lines(f) f.close() else: fname = os.path.expanduser(fname) encoding = locale.getdefaultlocale()[1] if encoding is None: encoding = "utf-8" with io.open(fname, encoding=encoding) as f: yield f _error_details_fmt = 'line #%d\n\t"%s"\n\tin file "%s"' def _rc_params_in_file(fname, fail_on_error=False): """Return :class:`matplotlib.RcParams` from the contents of the given file. Unlike `rc_params_from_file`, the configuration class only contains the parameters specified in the file (i.e. default values are not filled in). """ cnt = 0 rc_temp = {} with _open_file_or_url(fname) as fd: try: for line in fd: cnt += 1 strippedline = line.split('#', 1)[0].strip() if not strippedline: continue tup = strippedline.split(':', 1) if len(tup) != 2: error_details = _error_details_fmt % (cnt, line, fname) warnings.warn('Illegal %s' % error_details) continue key, val = tup key = key.strip() val = val.strip() if key in rc_temp: warnings.warn('Duplicate key in file "%s", line #%d' % (fname, cnt)) rc_temp[key] = (val, line, cnt) except UnicodeDecodeError: warnings.warn( ('Cannot decode configuration file %s with ' 'encoding %s, check LANG and LC_* variables') % (fname, locale.getdefaultlocale()[1] or 'utf-8 (default)')) raise config = RcParams() for key in ('verbose.level', 'verbose.fileo'): if key in rc_temp: val, line, cnt = rc_temp.pop(key) if fail_on_error: config[key] = val # try to convert to proper type or raise else: try: config[key] = val # try to convert to proper type or skip except Exception as msg: error_details = _error_details_fmt % (cnt, line, fname) warnings.warn('Bad val "%s" on %s\n\t%s' % (val, error_details, msg)) for key, (val, line, cnt) in six.iteritems(rc_temp): if key in defaultParams: if fail_on_error: config[key] = val # try to convert to proper type or raise else: try: config[key] = val # try to convert to proper type or skip except Exception as msg: error_details = _error_details_fmt % (cnt, line, fname) warnings.warn('Bad val "%s" on %s\n\t%s' % (val, error_details, msg)) elif key in _deprecated_ignore_map: warnings.warn('%s is deprecated. Update your matplotlibrc to use ' '%s instead.' % (key, _deprecated_ignore_map[key])) else: print(""" Bad key "%s" on line %d in %s. You probably need to get an updated matplotlibrc file from http://github.com/matplotlib/matplotlib/blob/master/matplotlibrc.template or from the matplotlib source distribution""" % (key, cnt, fname), file=sys.stderr) return config def rc_params_from_file(fname, fail_on_error=False, use_default_template=True): """Return :class:`matplotlib.RcParams` from the contents of the given file. Parameters ---------- fname : str Name of file parsed for matplotlib settings. fail_on_error : bool If True, raise an error when the parser fails to convert a parameter. use_default_template : bool If True, initialize with default parameters before updating with those in the given file. If False, the configuration class only contains the parameters specified in the file. (Useful for updating dicts.) """ config_from_file = _rc_params_in_file(fname, fail_on_error) if not use_default_template: return config_from_file iter_params = six.iteritems(defaultParams) config = RcParams([(key, default) for key, (default, _) in iter_params if key not in _all_deprecated]) config.update(config_from_file) verbose.set_level(config['verbose.level']) verbose.set_fileo(config['verbose.fileo']) if config['datapath'] is None: config['datapath'] = get_data_path() if not config['text.latex.preamble'] == ['']: verbose.report(""" ***************************************************************** You have the following UNSUPPORTED LaTeX preamble customizations: %s Please do not ask for support with these customizations active. ***************************************************************** """ % '\n'.join(config['text.latex.preamble']), 'helpful') verbose.report('loaded rc file %s' % fname) return config # this is the instance used by the matplotlib classes rcParams = rc_params() if rcParams['examples.directory']: # paths that are intended to be relative to matplotlib_fname() # are allowed for the examples.directory parameter. # However, we will need to fully qualify the path because # Sphinx requires absolute paths. if not os.path.isabs(rcParams['examples.directory']): _basedir, _fname = os.path.split(matplotlib_fname()) # Sometimes matplotlib_fname() can return relative paths, # Also, using realpath() guarentees that Sphinx will use # the same path that matplotlib sees (in case of weird symlinks). _basedir = os.path.realpath(_basedir) _fullpath = os.path.join(_basedir, rcParams['examples.directory']) rcParams['examples.directory'] = _fullpath rcParamsOrig = rcParams.copy() rcParamsDefault = RcParams([(key, default) for key, (default, converter) in six.iteritems(defaultParams) if key not in _all_deprecated]) rcParams['ps.usedistiller'] = checkdep_ps_distiller( rcParams['ps.usedistiller']) rcParams['text.usetex'] = checkdep_usetex(rcParams['text.usetex']) if rcParams['axes.formatter.use_locale']: locale.setlocale(locale.LC_ALL, '') def rc(group, **kwargs): """ Set the current rc params. Group is the grouping for the rc, e.g., for ``lines.linewidth`` the group is ``lines``, for ``axes.facecolor``, the group is ``axes``, and so on. Group may also be a list or tuple of group names, e.g., (*xtick*, *ytick*). *kwargs* is a dictionary attribute name/value pairs, e.g.,:: rc('lines', linewidth=2, color='r') sets the current rc params and is equivalent to:: rcParams['lines.linewidth'] = 2 rcParams['lines.color'] = 'r' The following aliases are available to save typing for interactive users: ===== ================= Alias Property ===== ================= 'lw' 'linewidth' 'ls' 'linestyle' 'c' 'color' 'fc' 'facecolor' 'ec' 'edgecolor' 'mew' 'markeredgewidth' 'aa' 'antialiased' ===== ================= Thus you could abbreviate the above rc command as:: rc('lines', lw=2, c='r') Note you can use python's kwargs dictionary facility to store dictionaries of default parameters. e.g., you can customize the font rc as follows:: font = {'family' : 'monospace', 'weight' : 'bold', 'size' : 'larger'} rc('font', **font) # pass in the font dict as kwargs This enables you to easily switch between several configurations. Use :func:`~matplotlib.pyplot.rcdefaults` to restore the default rc params after changes. """ aliases = { 'lw': 'linewidth', 'ls': 'linestyle', 'c': 'color', 'fc': 'facecolor', 'ec': 'edgecolor', 'mew': 'markeredgewidth', 'aa': 'antialiased', } if is_string_like(group): group = (group,) for g in group: for k, v in six.iteritems(kwargs): name = aliases.get(k) or k key = '%s.%s' % (g, name) try: rcParams[key] = v except KeyError: raise KeyError(('Unrecognized key "%s" for group "%s" and ' 'name "%s"') % (key, g, name)) def rcdefaults(): """ Restore the default rc params. These are not the params loaded by the rc file, but mpl's internal params. See rc_file_defaults for reloading the default params from the rc file """ rcParams.clear() rcParams.update(rcParamsDefault) def rc_file(fname): """ Update rc params from file. """ rcParams.update(rc_params_from_file(fname)) class rc_context(object): """ Return a context manager for managing rc settings. This allows one to do:: with mpl.rc_context(fname='screen.rc'): plt.plot(x, a) with mpl.rc_context(fname='print.rc'): plt.plot(x, b) plt.plot(x, c) The 'a' vs 'x' and 'c' vs 'x' plots would have settings from 'screen.rc', while the 'b' vs 'x' plot would have settings from 'print.rc'. A dictionary can also be passed to the context manager:: with mpl.rc_context(rc={'text.usetex': True}, fname='screen.rc'): plt.plot(x, a) The 'rc' dictionary takes precedence over the settings loaded from 'fname'. Passing a dictionary only is also valid. """ def __init__(self, rc=None, fname=None): self.rcdict = rc self.fname = fname self._rcparams = rcParams.copy() try: if self.fname: rc_file(self.fname) if self.rcdict: rcParams.update(self.rcdict) except: # if anything goes wrong, revert rc parameters and re-raise rcParams.clear() rcParams.update(self._rcparams) raise def __enter__(self): return self def __exit__(self, type, value, tb): rcParams.update(self._rcparams) def rc_file_defaults(): """ Restore the default rc params from the original matplotlib rc that was loaded """ rcParams.update(rcParamsOrig) _use_error_msg = """ This call to matplotlib.use() has no effect because the backend has already been chosen; matplotlib.use() must be called *before* pylab, matplotlib.pyplot, or matplotlib.backends is imported for the first time. """ def use(arg, warn=True, force=False): """ Set the matplotlib backend to one of the known backends. The argument is case-insensitive. *warn* specifies whether a warning should be issued if a backend has already been set up. *force* is an **experimental** flag that tells matplotlib to attempt to initialize a new backend by reloading the backend module. .. note:: This function must be called *before* importing pyplot for the first time; or, if you are not using pyplot, it must be called before importing matplotlib.backends. If warn is True, a warning is issued if you try and call this after pylab or pyplot have been loaded. In certain black magic use cases, e.g. :func:`pyplot.switch_backend`, we are doing the reloading necessary to make the backend switch work (in some cases, e.g., pure image backends) so one can set warn=False to suppress the warnings. To find out which backend is currently set, see :func:`matplotlib.get_backend`. """ # Lets determine the proper backend name first if arg.startswith('module://'): name = arg else: # Lowercase only non-module backend names (modules are case-sensitive) arg = arg.lower() name = validate_backend(arg) # Check if we've already set up a backend if 'matplotlib.backends' in sys.modules: # Warn only if called with a different name if (rcParams['backend'] != name) and warn: warnings.warn(_use_error_msg) # Unless we've been told to force it, just return if not force: return need_reload = True else: need_reload = False # Store the backend name rcParams['backend'] = name # If needed we reload here because a lot of setup code is triggered on # module import. See backends/__init__.py for more detail. if need_reload: reload(sys.modules['matplotlib.backends']) def get_backend(): """Return the name of the current backend.""" return rcParams['backend'] def interactive(b): """ Set interactive mode to boolean b. If b is True, then draw after every plotting command, e.g., after xlabel """ rcParams['interactive'] = b def is_interactive(): 'Return true if plot mode is interactive' return rcParams['interactive'] def tk_window_focus(): """Return true if focus maintenance under TkAgg on win32 is on. This currently works only for python.exe and IPython.exe. Both IDLE and Pythonwin.exe fail badly when tk_window_focus is on.""" if rcParams['backend'] != 'TkAgg': return False return rcParams['tk.window_focus'] # Now allow command line to override # Allow command line access to the backend with -d (MATLAB compatible # flag) for s in sys.argv[1:]: # cast to str because we are using unicode_literals, # and argv is always str if s.startswith(str('-d')) and len(s) > 2: # look for a -d flag try: use(s[2:]) warnings.warn("Using the -d command line argument to select a " "matplotlib backend is deprecated. Please use the " "MPLBACKEND environment variable instead.", mplDeprecation) break except (KeyError, ValueError): pass # we don't want to assume all -d flags are backends, e.g., -debug else: # no backend selected from the command line, so we check the environment # variable MPLBACKEND try: use(os.environ['MPLBACKEND']) except (KeyError, ValueError): pass default_test_modules = [ 'matplotlib.tests.test_agg', 'matplotlib.tests.test_animation', 'matplotlib.tests.test_arrow_patches', 'matplotlib.tests.test_artist', 'matplotlib.tests.test_axes', 'matplotlib.tests.test_backend_bases', 'matplotlib.tests.test_backend_pdf', 'matplotlib.tests.test_backend_pgf', 'matplotlib.tests.test_backend_ps', 'matplotlib.tests.test_backend_qt4', 'matplotlib.tests.test_backend_qt5', 'matplotlib.tests.test_backend_svg', 'matplotlib.tests.test_basic', 'matplotlib.tests.test_bbox_tight', 'matplotlib.tests.test_cbook', 'matplotlib.tests.test_coding_standards', 'matplotlib.tests.test_collections', 'matplotlib.tests.test_colorbar', 'matplotlib.tests.test_colors', 'matplotlib.tests.test_compare_images', 'matplotlib.tests.test_container', 'matplotlib.tests.test_contour', 'matplotlib.tests.test_dates', 'matplotlib.tests.test_delaunay', 'matplotlib.tests.test_figure', 'matplotlib.tests.test_font_manager', 'matplotlib.tests.test_gridspec', 'matplotlib.tests.test_image', 'matplotlib.tests.test_legend', 'matplotlib.tests.test_lines', 'matplotlib.tests.test_mathtext', 'matplotlib.tests.test_mlab', 'matplotlib.tests.test_offsetbox', 'matplotlib.tests.test_patches', 'matplotlib.tests.test_path', 'matplotlib.tests.test_patheffects', 'matplotlib.tests.test_pickle', 'matplotlib.tests.test_png', 'matplotlib.tests.test_quiver', 'matplotlib.tests.test_rcparams', 'matplotlib.tests.test_scale', 'matplotlib.tests.test_simplification', 'matplotlib.tests.test_spines', 'matplotlib.tests.test_streamplot', 'matplotlib.tests.test_style', 'matplotlib.tests.test_subplots', 'matplotlib.tests.test_table', 'matplotlib.tests.test_text', 'matplotlib.tests.test_texmanager', 'matplotlib.tests.test_ticker', 'matplotlib.tests.test_tightlayout', 'matplotlib.tests.test_transforms', 'matplotlib.tests.test_triangulation', 'matplotlib.tests.test_units', 'matplotlib.tests.test_widgets', 'matplotlib.tests.test_cycles', 'matplotlib.tests.test_labeled_data_unpacking', 'matplotlib.sphinxext.tests.test_tinypages', 'mpl_toolkits.tests.test_mplot3d', 'mpl_toolkits.tests.test_axes_grid1', 'mpl_toolkits.tests.test_axes_grid', ] def verify_test_dependencies(): if not os.path.isdir(os.path.join(os.path.dirname(__file__), 'tests')): raise ImportError("matplotlib test data is not installed") try: import nose try: from unittest import mock except: import mock except ImportError: print("matplotlib.test requires nose and mock to run.") raise def test(verbosity=1): """run the matplotlib test suite""" verify_test_dependencies() try: import faulthandler except ImportError: pass else: faulthandler.enable() old_backend = rcParams['backend'] try: use('agg') import nose import nose.plugins.builtin from .testing.noseclasses import KnownFailure from nose.plugins.manager import PluginManager from nose.plugins import multiprocess # store the old values before overriding plugins = [] plugins.append(KnownFailure()) plugins.extend([plugin() for plugin in nose.plugins.builtin.plugins]) manager = PluginManager(plugins=plugins) config = nose.config.Config(verbosity=verbosity, plugins=manager) # Nose doesn't automatically instantiate all of the plugins in the # child processes, so we have to provide the multiprocess plugin with # a list. multiprocess._instantiate_plugins = [KnownFailure] success = nose.run( defaultTest=default_test_modules, config=config, ) finally: if old_backend.lower() != 'agg': use(old_backend) return success test.__test__ = False # nose: this function is not a test def _replacer(data, key): # if key isn't a string don't bother if not isinstance(key, six.string_types): return key # try to use __getitem__ try: return data[key] # key does not exist, silently fall back to key except KeyError: return key _DATA_DOC_APPENDIX = """ Notes ----- In addition to the above described arguments, this function can take a **data** keyword argument. If such a **data** argument is given, the following arguments are replaced by **data[]**: {replaced} """ def unpack_labeled_data(replace_names=None, replace_all_args=False, label_namer=None, positional_parameter_names=None): """ A decorator to add a 'data' kwarg to any a function. The signature of the input function must include the ax argument at the first position :: def foo(ax, *args, **kwargs) so this is suitable for use with Axes methods. Parameters ---------- replace_names : list of strings, optional, default: None The list of parameter names which arguments should be replaced by `data[name]`. If None, all arguments are replaced if they are included in `data`. replace_all_args : bool, default: False If True, all arguments in *args get replaced, even if they are not in replace_names. label_namer : string, optional, default: None The name of the parameter which argument should be used as label, if label is not set. If None, the label keyword argument is not set. positional_parameter_names : list of strings or callable, optional The full list of positional parameter names (excluding an explicit `ax`/'self' argument at the first place and including all possible positional parameter in `*args`), in the right order. Can also include all other keyword parameter. Only needed if the wrapped function does contain `*args` and (replace_names is not None or replace_all_args is False). If it is a callable, it will be called with the actual tuple of *args and the data and should return a list like above. NOTE: callables should only be used when the names and order of *args can only be determined at runtime. Please use list of names when the order and names of *args is clear before runtime! """ if replace_names is not None: replace_names = set(replace_names) def param(func): new_sig = None python_has_signature = major >= 3 and minor1 >= 3 python_has_wrapped = major >= 3 and minor1 >= 2 # if in a legacy version of python and IPython is already imported # try to use their back-ported signature if not python_has_signature and 'IPython' in sys.modules: try: import IPython.utils.signatures signature = IPython.utils.signatures.signature Parameter = IPython.utils.signatures.Parameter except ImportError: pass else: python_has_signature = True else: if python_has_signature: signature = inspect.signature Parameter = inspect.Parameter if not python_has_signature: arg_spec = inspect.getargspec(func) _arg_names = arg_spec.args _has_varargs = arg_spec.varargs is not None _has_varkwargs = arg_spec.keywords is not None else: sig = signature(func) _has_varargs = False _has_varkwargs = False _arg_names = [] params = list(sig.parameters.values()) for p in params: if p.kind is Parameter.VAR_POSITIONAL: _has_varargs = True elif p.kind is Parameter.VAR_KEYWORD: _has_varkwargs = True else: _arg_names.append(p.name) data_param = Parameter('data', Parameter.KEYWORD_ONLY, default=None) if _has_varkwargs: params.insert(-1, data_param) else: params.append(data_param) new_sig = sig.replace(parameters=params) # Import-time check: do we have enough information to replace *args? arg_names_at_runtime = False # there can't be any positional arguments behind *args and no # positional args can end up in **kwargs, so only *varargs make # problems. # http://stupidpythonideas.blogspot.de/2013/08/arguments-and-parameters.html if not _has_varargs: # all args are "named", so no problem # remove the first "ax" / self arg arg_names = _arg_names[1:] else: # Here we have "unnamed" variables and we need a way to determine # whether to replace a arg or not if replace_names is None: # all argnames should be replaced arg_names = None elif len(replace_names) == 0: # No argnames should be replaced arg_names = [] elif len(_arg_names) > 1 and (positional_parameter_names is None): # we got no manual parameter names but more than an 'ax' ... if len(set(replace_names) - set(_arg_names[1:])) == 0: # all to be replaced arguments are in the list arg_names = _arg_names[1:] else: msg = ("Got unknown 'replace_names' and wrapped function " "'%s' uses '*args', need " "'positional_parameter_names'!") raise AssertionError(msg % func.__name__) else: if positional_parameter_names is not None: if callable(positional_parameter_names): # determined by the function at runtime arg_names_at_runtime = True # so that we don't compute the label_pos at import time arg_names = [] else: arg_names = positional_parameter_names else: if replace_all_args: arg_names = [] else: msg = ("Got 'replace_names' and wrapped function " "'%s' uses *args, need " "'positional_parameter_names' or " "'replace_all_args'!") raise AssertionError(msg % func.__name__) # compute the possible label_namer and label position in positional # arguments label_pos = 9999 # bigger than all "possible" argument lists label_namer_pos = 9999 # bigger than all "possible" argument lists if (label_namer and # we actually want a label here ... arg_names and # and we can determine a label in *args ... (label_namer in arg_names)): # and it is in *args label_namer_pos = arg_names.index(label_namer) if "label" in arg_names: label_pos = arg_names.index("label") # Check the case we know a label_namer but we can't find it the # arg_names... Unfortunately the label_namer can be in **kwargs, # which we can't detect here and which results in a non-set label # which might surprise the user :-( if label_namer and not arg_names_at_runtime and not _has_varkwargs: if not arg_names: msg = ("label_namer '%s' can't be found as the parameter " "without 'positional_parameter_names'.") raise AssertionError(msg % label_namer) elif label_namer not in arg_names: msg = ("label_namer '%s' can't be found in the parameter " "names (known argnames: %s).") raise AssertionError(msg % (label_namer, arg_names)) else: # this is the case when the name is in arg_names pass @functools.wraps(func) def inner(ax, *args, **kwargs): # this is needed because we want to change these values if # arg_names_at_runtime==True, but python does not allow assigning # to a variable in a outer scope. So use some new local ones and # set them to the already computed values. _label_pos = label_pos _label_namer_pos = label_namer_pos _arg_names = arg_names label = None data = kwargs.pop('data', None) if data is not None: if arg_names_at_runtime: # update the information about replace names and # label position _arg_names = positional_parameter_names(args, data) if (label_namer and # we actually want a label here ... _arg_names and # and we can find a label in *args (label_namer in _arg_names)): # and it is in *args _label_namer_pos = _arg_names.index(label_namer) if "label" in _arg_names: _label_pos = arg_names.index("label") # save the current label_namer value so that it can be used as # a label if _label_namer_pos < len(args): label = args[_label_namer_pos] else: label = kwargs.get(label_namer, None) # ensure a string, as label can't be anything else if not isinstance(label, six.string_types): label = None if (replace_names is None) or (replace_all_args is True): # all should be replaced args = tuple(_replacer(data, a) for j, a in enumerate(args)) else: # An arg is replaced if the arg_name of that position is # in replace_names ... if len(_arg_names) < len(args): raise RuntimeError( "Got more args than function expects") args = tuple(_replacer(data, a) if _arg_names[j] in replace_names else a for j, a in enumerate(args)) if replace_names is None: # replace all kwargs ... kwargs = dict((k, _replacer(data, v)) for k, v in six.iteritems(kwargs)) else: # ... or only if a kwarg of that name is in replace_names kwargs = dict((k, _replacer(data, v) if k in replace_names else v) for k, v in six.iteritems(kwargs)) # replace the label if this func "wants" a label arg and the user # didn't set one. Note: if the user puts in "label=None", it does # *NOT* get replaced! user_supplied_label = ( (len(args) >= _label_pos) or # label is included in args ('label' in kwargs) # ... or in kwargs ) if (label_namer and not user_supplied_label): if _label_namer_pos < len(args): kwargs['label'] = get_label(args[_label_namer_pos], label) elif label_namer in kwargs: kwargs['label'] = get_label(kwargs[label_namer], label) else: import warnings msg = ("Tried to set a label via parameter '%s' in " "func '%s' but couldn't find such an argument. \n" "(This is a programming error, please report to " "the matplotlib list!)") warnings.warn(msg % (label_namer, func.__name__), RuntimeWarning, stacklevel=2) return func(ax, *args, **kwargs) pre_doc = inner.__doc__ if pre_doc is None: pre_doc = '' else: pre_doc = dedent(pre_doc) _repl = "" if replace_names is None: _repl = "* All positional and all keyword arguments." else: if len(replace_names) != 0: _repl = "* All arguments with the following names: '{names}'." if replace_all_args: _repl += "\n* All positional arguments." _repl = _repl.format(names="', '".join(replace_names)) inner.__doc__ = (pre_doc + _DATA_DOC_APPENDIX.format(replaced=_repl)) if not python_has_wrapped: inner.__wrapped__ = func if new_sig is not None: inner.__signature__ = new_sig return inner return param verbose.report('matplotlib version %s' % __version__) verbose.report('verbose.level %s' % verbose.level) verbose.report('interactive is %s' % is_interactive()) verbose.report('platform is %s' % sys.platform) verbose.report('loaded modules: %s' % six.iterkeys(sys.modules), 'debug')