matplotlib · jklymak · Apr 2, 2018 · Jul 7, 2018 · Jul 7, 2018 · Jul 7, 2018
diff --git a/.flake8 b/.flake8
@@ -0,0 +1,112 @@
+[flake8]
+ignore =
+    # Normal default
+    E121,E123,E126,E226,E24,E704,W503,W504,
+    # Additional ignores:
+    E111, E114, E115, E116, E122, E124, E125, E127, E128, E129, E131,
+    E265, E266,
+    E305, E306,
+    E722, E741,
+    F401, F403, F811, F841,
+    # Some new flake8 ignores:
+    N801, N802, N803, N806, N812,
+
+exclude =
+    .git
+    build
+    # External files.
+    versioneer.py
+    tools/gh_api.py
+    tools/github_stats.py
+
+per-file-ignores =
+    setup.py: E402
+    setupext.py: E302, E501
+
+    tools/compare_backend_driver_results.py: E501
+    tools/subset.py: E221, E231, E251, E261, E302, E501, E701
+
+    matplotlib/_cm.py: E202, E203
+    matplotlib/_mathtext_data.py: E203, E261
+    matplotlib/backend_bases.py: E225
+    matplotlib/backends/_backend_tk.py: E203, E222, E225, E231, E271, E301, E303, E401, E501, E701
+    matplotlib/backends/backend_agg.py: E261, E302, E303, E701
+    matplotlib/backends/backend_cairo.py: E203, E221, E261, E303, E402, E711
+    matplotlib/backends/backend_gtk3.py: E203, E221, E222, E225, E251, E261, E501
+    matplotlib/backends/backend_macosx.py: E231, E261
+    matplotlib/backends/backend_pgf.py: E303, E731
+    matplotlib/backends/backend_ps.py: E203, E225, E228, E231, E261, E262, E302, E303, E501, E701
+    matplotlib/backends/backend_svg.py: E203, E225, E228, E231, E261, E302, E501
+    matplotlib/backends/qt_editor/formlayout.py: E301, E501
+    matplotlib/backends/tkagg.py: E231, E302, E701
+    matplotlib/backends/windowing.py: E301, E302
+    matplotlib/font_manager.py: E203, E221, E225, E251, E261, E262, E302, E501
+    matplotlib/fontconfig_pattern.py: E201, E203, E221, E222, E225, E302
+    matplotlib/legend_handler.py: E201, E501
+    matplotlib/mathtext.py: E201, E202, E203, E211, E221, E222, E225, E231, E251, E261, E301, E302, E303, E402, E501
+    matplotlib/patheffects.py: E231
+    matplotlib/projections/geo.py: E203, E221, E231, E261, E502
+    matplotlib/pylab.py: E501
+    matplotlib/pyplot.py: E201, E202, E221, E222, E225, E231, E251, E261, E302, E501, E701
+    matplotlib/rcsetup.py: E203, E225, E261, E302, E501
+    matplotlib/sphinxext/mathmpl.py: E302
+    matplotlib/sphinxext/only_directives.py: E302
+    matplotlib/sphinxext/plot_directive.py: E261, E302, E402
+    matplotlib/tests/test_image.py: E225, E231, E251, E302, E501
+    matplotlib/tests/test_lines.py: E231, E261
+    matplotlib/tests/test_mathtext.py: E261, E501
+    matplotlib/transforms.py: E201, E202, E203, E501
+    matplotlib/tri/triinterpolate.py: E201, E221
+    matplotlib/type1font.py: E731
+
+    mpl_toolkits/__init__.py: E261
+    mpl_toolkits/axes_grid/axes_divider.py: E501
+    mpl_toolkits/axes_grid/axes_rgb.py: E302, E501
+    mpl_toolkits/axes_grid1/axes_divider.py: E402, E501
+    mpl_toolkits/axes_grid1/axes_grid.py: E225
+    mpl_toolkits/axes_grid1/axes_rgb.py: E231
+    mpl_toolkits/axes_grid1/axes_size.py: E261, E501
+    mpl_toolkits/axes_grid1/colorbar.py: E225, E231, E261, E262, E302, E303, E501, E701
+    mpl_toolkits/axes_grid1/inset_locator.py: E501
+    mpl_toolkits/axes_grid1/mpl_axes.py: E303, E501
+    mpl_toolkits/axes_grid1/parasite_axes.py: E225, E231, E302, E303, E501
+    mpl_toolkits/axisartist/angle_helper.py: E201, E203, E221, E222, E225, E231, E251, E261, E262, E302, E303, E501
+    mpl_toolkits/axisartist/axis_artist.py: E201, E202, E221, E225, E228, E231, E251, E261, E262, E302, E303, E402, E501, E701, E711
+    mpl_toolkits/axisartist/axisline_style.py: E231, E261, E262, E302, E303
+    mpl_toolkits/axisartist/axislines.py: E225, E231, E261, E303, E501
+    mpl_toolkits/axisartist/clip_path.py: E225, E302, E303, E501
+    mpl_toolkits/axisartist/floating_axes.py: E225, E231, E261, E262, E302, E303, E402, E501
+    mpl_toolkits/axisartist/grid_finder.py: E231, E261, E302, E303, E402
+    mpl_toolkits/axisartist/grid_helper_curvelinear.py: E225, E231, E261, E262, E271, E302, E303, E501
+    mpl_toolkits/mplot3d/art3d.py: E203, E222, E225, E231
+    mpl_toolkits/mplot3d/axes3d.py: E203, E231, E303, E402, E501, E701
+    mpl_toolkits/mplot3d/axis3d.py: E231, E302
+    mpl_toolkits/mplot3d/proj3d.py: E231, E302, E303
+    mpl_toolkits/tests/test_axes_grid1.py: E201, E202
+    mpl_toolkits/tests/test_mplot3d.py: E231, E302
+
+    doc/**: E302, E501
+    doc/conf.py: E402
+    tutorials/**: E402, E501
+
+    examples/**: E501, E402
+    examples/images_contours_and_fields/tricontour_demo.py: E201
+    examples/images_contours_and_fields/tripcolor_demo.py: E201
+    examples/images_contours_and_fields/triplot_demo.py: E201
+    examples/misc/table_demo.py: E201
+    examples/pyplots/annotate_transform.py: E228, E251
+    examples/pyplots/annotation_polar.py: E231
+    examples/pyplots/auto_subplots_adjust.py: E231, E261, E302
+    examples/pyplots/boxplot_demo_pyplot.py: E231
+    examples/pyplots/compound_path_demo.py: E231
+    examples/pyplots/fig_axes_customize_simple.py: E261
+    examples/pyplots/pyplot_formatstr.py: E231
+    examples/pyplots/pyplot_mathtext.py: E231
+    examples/pyplots/pyplot_simple.py: E231
+    examples/pyplots/pyplot_two_subplots.py: E302
+    examples/pyplots/text_commands.py: E231
+    examples/pyplots/text_layout.py: E231
+    examples/pyplots/whats_new_98_4_fancy.py: E225, E261, E302
+    examples/pyplots/whats_new_98_4_fill_between.py: E225
+    examples/pyplots/whats_new_98_4_legend.py: E228
+    examples/pyplots/whats_new_99_spines.py: E231, E261
diff --git a/.travis.yml b/.travis.yml
@@ -64,7 +64,7 @@ env:
     - OPENBLAS_NUM_THREADS=1
     - PYTHONFAULTHANDLER=1
     - PYTEST_ADDOPTS="-rawR --maxfail=50 --timeout=300 --durations=25 --cov-report= --cov=lib -n $NPROC"
-    - RUN_PEP8=
+    - RUN_FLAKE8=
 
 matrix:
   include:
@@ -78,8 +78,8 @@ matrix:
     - python: 3.6
       env:
         - DELETE_FONT_CACHE=1
-        - PYTEST_ADDOPTS="$PYTEST_ADDOPTS --pep8"
         - EXTRAREQS='-r requirements/testing/travis36.txt'
+        - RUN_FLAKE8=1
     - python: "nightly"
       env: PRE=--pre
     - os: osx
@@ -158,6 +158,10 @@ before_script: |
   fi
 
 script: |
+  set -e
+  if [[ $RUN_FLAKE8 == 1 ]]; then
+    flake8 --statistics && echo "Flake8 passed without any issues!"
+  fi
   echo "Calling pytest with the following arguments: $PYTEST_ADDOPTS"
   python -mpytest
 

diff --git a/doc/conf.py b/doc/conf.py
@@ -95,7 +95,6 @@ def _check_deps():
 }
 
 
-
 # Sphinx gallery configuration
 sphinx_gallery_conf = {
     'examples_dirs': ['../examples', '../tutorials'],
@@ -149,7 +148,6 @@ def _check_deps():
              'team; 2012 - 2018 The Matplotlib development team')
 
 
-
 # The default replacements for |version| and |release|, also used in various
 # other places throughout the built documents.
 #

diff --git a/doc/sphinxext/gallery_order.py b/doc/sphinxext/gallery_order.py
@@ -69,7 +69,7 @@ def __call__(self, item):
 class MplExplicitSubOrder(object):
     """ for use within the 'within_subsection_order' key """
     def __init__(self, src_dir):
-        self.src_dir = src_dir #src_dir is unused here
+        self.src_dir = src_dir  # src_dir is unused here
         self.ordered_list = explicit_subsection_order
 
     def __call__(self, item):

diff --git a/doc/users/generate_credits.py b/doc/users/generate_credits.py
@@ -63,7 +63,7 @@ def check_duplicates():
     contributors = [line.split('\t', 1)[1].strip() for line in lines if line]
     emails = [re.match('.*<(.*)>', line).group(1) for line in contributors]
     email_counter = Counter(emails)
-    
+
     if email_counter.most_common(1)[0][1] > 1:
         print('DUPLICATE CHECK: The following email addesses are used with more '
               'than one name.\nConsider adding them to .mailmap.\n')

diff --git a/examples/lines_bars_and_markers/marker_reference.py b/examples/lines_bars_and_markers/marker_reference.py
@@ -34,7 +34,7 @@ def nice_repr(text):
 
 def math_repr(text):
     tx = repr(text).lstrip('u').strip("'").strip("$")
-    return "'\${}\$'".format(tx)
+    return r"'\${}\$'".format(tx)
 
 
 def split_list(a_list):

diff --git a/examples/recipes/fill_between_alpha.py b/examples/recipes/fill_between_alpha.py
@@ -81,7 +81,7 @@
 ax.plot(t, mu2, lw=2, label='mean population 2', color='yellow')
 ax.fill_between(t, mu1+sigma1, mu1-sigma1, facecolor='blue', alpha=0.5)
 ax.fill_between(t, mu2+sigma2, mu2-sigma2, facecolor='yellow', alpha=0.5)
-ax.set_title('random walkers empirical $\mu$ and $\pm \sigma$ interval')
+ax.set_title(r'random walkers empirical $\mu$ and $\pm \sigma$ interval')
 ax.legend(loc='upper left')
 ax.set_xlabel('num steps')
 ax.set_ylabel('position')

diff --git a/examples/recipes/placing_text_boxes.py b/examples/recipes/placing_text_boxes.py
@@ -20,7 +20,10 @@
 mu = x.mean()
 median = np.median(x)
 sigma = x.std()
-textstr = '$\mu=%.2f$\n$\mathrm{median}=%.2f$\n$\sigma=%.2f$' % (mu, median, sigma)
+textstr = '\n'.join((
+    r'$\mu=%.2f$' % (mu, ),
+    r'$\mathrm{median}=%.2f$' % (median, ),
+    r'$\sigma=%.2f$' % (sigma, )))
 
 ax.hist(x, 50)
 # these are matplotlib.patch.Patch properties

diff --git a/examples/scales/power_norm.py b/examples/scales/power_norm.py
@@ -25,7 +25,7 @@
 axes[0, 0].hist2d(data[:, 0], data[:, 1], bins=100)
 
 for ax, gamma in zip(axes.flat[1:], gammas):
-    ax.set_title('Power law $(\gamma=%1.1f)$' % gamma)
+    ax.set_title(r'Power law $(\gamma=%1.1f)$' % gamma)
     ax.hist2d(data[:, 0], data[:, 1],
               bins=100, norm=mcolors.PowerNorm(gamma))
 

diff --git a/examples/text_labels_and_annotations/arrow_demo.py b/examples/text_labels_and_annotations/arrow_demo.py
@@ -213,7 +213,7 @@ def draw_arrow(pair, alpha=alpha, ec=ec, labelcolor=labelcolor):
         coords = np.dot(orig_position, M) + [[x_pos, y_pos]]
         x, y = np.ravel(coords)
         orig_label = rate_labels[pair]
-        label = '$%s_{_{\mathrm{%s}}}$' % (orig_label[0], orig_label[1:])
+        label = r'$%s_{_{\mathrm{%s}}}$' % (orig_label[0], orig_label[1:])
 
         plt.text(x, y, label, size=label_text_size, ha='center', va='center',
                  color=labelcolor or fc)

diff --git a/examples/ticks_and_spines/spines_bounds.py b/examples/ticks_and_spines/spines_bounds.py
@@ -22,7 +22,7 @@
 # set ticks and tick labels
 ax.set_xlim((0, 2*np.pi))
 ax.set_xticks([0, np.pi, 2*np.pi])
-ax.set_xticklabels(['0', '$\pi$', '2$\pi$'])
+ax.set_xticklabels(['0', r'$\pi$', r'2$\pi$'])
 ax.set_ylim((-1.5, 1.5))
 ax.set_yticks([-1, 0, 1])
 

diff --git a/examples/units/basic_units.py b/examples/units/basic_units.py
@@ -25,13 +25,13 @@ def __get__(self, obj, objtype=None):
 
 
 class TaggedValueMeta(type):
-    def __init__(cls, name, bases, dict):
-        for fn_name in cls._proxies:
+    def __init__(self, name, bases, dict):
+        for fn_name in self._proxies:
             try:
-                dummy = getattr(cls, fn_name)
+                dummy = getattr(self, fn_name)
             except AttributeError:
-                setattr(cls, fn_name,
-                        ProxyDelegate(fn_name, cls._proxies[fn_name]))
+                setattr(self, fn_name,
+                        ProxyDelegate(fn_name, self._proxies[fn_name]))
 
 
 class PassThroughProxy(object):

diff --git a/lib/matplotlib/__init__.py b/lib/matplotlib/__init__.py
@@ -918,7 +918,7 @@ def __getitem__(self, key):
         elif key in _deprecated_ignore_map:
             version, alt_key = _deprecated_ignore_map[key]
             cbook.warn_deprecated(
-                version, key, obj_type, alternative=alt_key)
+                version, key, obj_type="rcparam", alternative=alt_key)
             return dict.__getitem__(self, alt_key) if alt_key else None
 
         elif key == 'examples.directory':

diff --git a/lib/matplotlib/gridspec.py b/lib/matplotlib/gridspec.py
@@ -20,7 +20,7 @@
 import numpy as np
 
 import matplotlib as mpl
-from matplotlib import _pylab_helpers, tight_layout, rcParams
+from matplotlib import _pylab_helpers, cbook, tight_layout, rcParams
 from matplotlib.transforms import Bbox
 import matplotlib._layoutbox as layoutbox
 

diff --git a/lib/matplotlib/patches.py b/lib/matplotlib/patches.py
@@ -1858,7 +1858,7 @@ class _Style(object):
     where actual styles are declared as subclass of it, and it
     provides some helper functions.
     """
-    def __new__(self, stylename, **kw):
+    def __new__(cls, stylename, **kw):
         """
         return the instance of the subclass with the given style name.
         """
@@ -1869,7 +1869,7 @@ def __new__(self, stylename, **kw):
         _list = stylename.replace(" ", "").split(",")
         _name = _list[0].lower()
         try:
-            _cls = self._style_list[_name]
+            _cls = cls._style_list[_name]
         except KeyError:
             raise ValueError("Unknown style : %s" % stylename)
 
@@ -1883,29 +1883,29 @@ def __new__(self, stylename, **kw):
         return _cls(**_args)
 
     @classmethod
-    def get_styles(klass):
+    def get_styles(cls):
         """
         A class method which returns a dictionary of available styles.
         """
-        return klass._style_list
+        return cls._style_list
 
     @classmethod
-    def pprint_styles(klass):
+    def pprint_styles(cls):
         """
         A class method which returns a string of the available styles.
         """
-        return _pprint_styles(klass._style_list)
+        return _pprint_styles(cls._style_list)
 
     @classmethod
-    def register(klass, name, style):
+    def register(cls, name, style):
         """
         Register a new style.
         """
 
-        if not issubclass(style, klass._Base):
+        if not issubclass(style, cls._Base):
             raise ValueError("%s must be a subclass of %s" % (style,
-                                                              klass._Base))
-        klass._style_list[name] = style
+                                                              cls._Base))
+        cls._style_list[name] = style
 
 
 def _register_style(style_list, cls=None, *, name=None):

diff --git a/lib/matplotlib/sphinxext/plot_directive.py b/lib/matplotlib/sphinxext/plot_directive.py
@@ -340,7 +340,7 @@ def remove_coding(text):
     Remove the coding comment, which six.exec\_ doesn't like.
     """
     cbook.warn_deprecated('3.0', name='remove_coding', removal='3.1')
-    sub_re = re.compile("^#\s*-\*-\s*coding:\s*.*-\*-$", flags=re.MULTILINE)
+    sub_re = re.compile(r"^#\s*-\*-\s*coding:\s*.*-\*-$", flags=re.MULTILINE)
     return sub_re.sub("", text)
 
 #------------------------------------------------------------------------------

diff --git a/lib/matplotlib/tests/test_animation.py b/lib/matplotlib/tests/test_animation.py
@@ -109,7 +109,7 @@ def __init__(self, fps=None, codec=None, bitrate=None,
         pass
 
     @classmethod
-    def isAvailable(self):
+    def isAvailable(cls):
         return True
 
 

diff --git a/lib/matplotlib/tests/test_font_manager.py b/lib/matplotlib/tests/test_font_manager.py
@@ -8,7 +8,7 @@
 
 from matplotlib.font_manager import (
     findfont, FontProperties, fontManager, json_dump, json_load, get_font,
-    get_fontconfig_fonts, is_opentype_cff_font, fontManager as fm)
+    get_fontconfig_fonts, is_opentype_cff_font)
 from matplotlib import rc_context
 
 has_fclist = shutil.which('fc-list') is not None
@@ -67,7 +67,7 @@ def test_otf():
     if os.path.exists(fname):
         assert is_opentype_cff_font(fname)
 
-    otf_files = [f for f in fm.ttffiles if 'otf' in f]
+    otf_files = [f for f in fontManager.ttffiles if 'otf' in f]
     for f in otf_files:
         with open(f, 'rb') as fd:
             res = fd.read(4) == b'OTTO'

diff --git a/lib/matplotlib/tests/test_pickle.py b/lib/matplotlib/tests/test_pickle.py
@@ -111,11 +111,11 @@ def test_complete():
 
 def test_no_pyplot():
     # tests pickle-ability of a figure not created with pyplot
-    from matplotlib.backends.backend_pdf import FigureCanvasPdf as fc
+    from matplotlib.backends.backend_pdf import FigureCanvasPdf
     from matplotlib.figure import Figure
 
     fig = Figure()
-    _ = fc(fig)
+    _ = FigureCanvasPdf(fig)
     ax = fig.add_subplot(1, 1, 1)
     ax.plot([1, 2, 3], [1, 2, 3])
     pickle.dump(fig, BytesIO(), pickle.HIGHEST_PROTOCOL)

diff --git a/lib/matplotlib/tight_layout.py b/lib/matplotlib/tight_layout.py
@@ -214,7 +214,6 @@ def auto_adjust_subplotpars(
 
     return kwargs
 
-
 def get_renderer(fig):
     if fig._cachedRenderer:
         renderer = fig._cachedRenderer