matplotlib · jklymak · Jul 17, 2018 · Feb 28, 2018
diff --git a/examples/statistics/barchart_demo.py b/examples/statistics/barchart_demo.py
@@ -77,9 +77,9 @@ def attach_ordinal(num):
     1 -> 1st
     56 -> 56th
     """
-    suffixes = dict((str(i), v) for i, v in
-                    enumerate(['th', 'st', 'nd', 'rd', 'th',
-                               'th', 'th', 'th', 'th', 'th']))
+    suffixes = {str(i): v
+                for i, v in enumerate(['th', 'st', 'nd', 'rd', 'th',
+                                       'th', 'th', 'th', 'th', 'th'])}
 
     v = str(num)
     # special case early teens
@@ -170,7 +170,7 @@ def plot_student_results(student, scores, cohort_size):
 
         rankStr = attach_ordinal(width)
         # The bars aren't wide enough to print the ranking inside
-        if (width < 5):
+        if width < 5:
             # Shift the text to the right side of the right edge
             xloc = width + 1
             # Black against white background

diff --git a/examples/units/basic_units.py b/examples/units/basic_units.py
@@ -249,13 +249,13 @@ def get_unit(self):
 class UnitResolver(object):
     def addition_rule(self, units):
         for unit_1, unit_2 in zip(units[:-1], units[1:]):
-            if (unit_1 != unit_2):
+            if unit_1 != unit_2:
                 return NotImplemented
         return units[0]
 
     def multiplication_rule(self, units):
         non_null = [u for u in units if u]
-        if (len(non_null) > 1):
+        if len(non_null) > 1:
             return NotImplemented
         return non_null[0]
 
@@ -268,7 +268,7 @@ def multiplication_rule(self, units):
         '__rsub__': addition_rule}
 
     def __call__(self, operation, units):
-        if (operation not in self.op_dict):
+        if operation not in self.op_dict:
             return NotImplemented
 
         return self.op_dict[operation](self, units)

diff --git a/lib/matplotlib/backends/backend_ps.py b/lib/matplotlib/backends/backend_ps.py
@@ -266,15 +266,16 @@ def set_linedash(self, offset, seq, store=1):
             self.linedash = (offset, seq)
 
     def set_font(self, fontname, fontsize, store=1):
-        if rcParams['ps.useafm']: return
-        if (fontname,fontsize) != (self.fontname,self.fontsize):
+        if rcParams['ps.useafm']:
+            return
+        if (fontname, fontsize) != (self.fontname,self.fontsize):
             out = ("/%s findfont\n"
                    "%1.3f scalefont\n"
                    "setfont\n" % (fontname, fontsize))
-
             self._pswriter.write(out)
-            if store: self.fontname = fontname
-            if store: self.fontsize = fontsize
+            if store:
+                self.fontname = fontname
+                self.fontsize = fontsize
 
     def create_hatch(self, hatch):
         sidelen = 72

diff --git a/lib/matplotlib/cbook/__init__.py b/lib/matplotlib/cbook/__init__.py
@@ -1095,7 +1095,7 @@ def delete_masked_points(*args):
     """
     if not len(args):
         return ()
-    if isinstance(args[0], str) or not iterable(args[0]):
+    if is_scalar_or_string(args[0]):
         raise ValueError("First argument must be a sequence")
     nrecs = len(args[0])
     margs = []

diff --git a/lib/matplotlib/collections.py b/lib/matplotlib/collections.py
@@ -964,7 +964,7 @@ def set_verts(self, verts, closed=True):
 
     def set_verts_and_codes(self, verts, codes):
         '''This allows one to initialize vertices with path codes.'''
-        if (len(verts) != len(codes)):
+        if len(verts) != len(codes):
             raise ValueError("'codes' must be a 1D list or array "
                              "with the same length of 'verts'")
         self._paths = []

diff --git a/lib/matplotlib/figure.py b/lib/matplotlib/figure.py
@@ -737,9 +737,9 @@ def suptitle(self, t, **kwargs):
         x = kwargs.pop('x', 0.5)
         y = kwargs.pop('y', 0.98)
 
-        if ('horizontalalignment' not in kwargs) and ('ha' not in kwargs):
+        if 'horizontalalignment' not in kwargs and 'ha' not in kwargs:
             kwargs['horizontalalignment'] = 'center'
-        if ('verticalalignment' not in kwargs) and ('va' not in kwargs):
+        if 'verticalalignment' not in kwargs and 'va' not in kwargs:
             kwargs['verticalalignment'] = 'top'
 
         if 'fontproperties' not in kwargs:

diff --git a/lib/matplotlib/gridspec.py b/lib/matplotlib/gridspec.py
@@ -212,7 +212,7 @@ def __init__(self, nrows, ncols, figure=None,
                               width_ratios=width_ratios,
                               height_ratios=height_ratios)
 
-        if (self.figure is None) or not self.figure.get_constrained_layout():
+        if self.figure is None or not self.figure.get_constrained_layout():
             self._layoutbox = None
         else:
             self.figure.init_layoutbox()

diff --git a/lib/matplotlib/legend.py b/lib/matplotlib/legend.py
@@ -1242,7 +1242,7 @@ def _get_legend_handles_labels(axs, legend_handler_map=None):
 
     for handle in _get_legend_handles(axs, legend_handler_map):
         label = handle.get_label()
-        if (label and not label.startswith('_')):
+        if label and not label.startswith('_'):
             handles.append(handle)
             labels.append(label)
     return handles, labels

diff --git a/lib/matplotlib/lines.py b/lib/matplotlib/lines.py
@@ -882,10 +882,7 @@ def get_markeredgewidth(self):
         return self._markeredgewidth
 
     def _get_markerfacecolor(self, alt=False):
-        if alt:
-            fc = self._markerfacecoloralt
-        else:
-            fc = self._markerfacecolor
+        fc = self._markerfacecoloralt if alt else self._markerfacecolor
         if cbook._str_lower_equal(fc, 'auto'):
             if self.get_fillstyle() == 'none':
                 return 'none'

diff --git a/lib/matplotlib/patches.py b/lib/matplotlib/patches.py
@@ -71,9 +71,9 @@ def __init__(self,
         self._hatch_color = colors.to_rgba(mpl.rcParams['hatch.color'])
         self._fill = True  # needed for set_facecolor call
         if color is not None:
-            if (edgecolor is not None or facecolor is not None):
+            if edgecolor is not None or facecolor is not None:
                 warnings.warn("Setting the 'color' property will override"
-                              "the edgecolor or facecolor properties. ")
+                              "the edgecolor or facecolor properties.")
             self.set_color(color)
         else:
             self.set_edgecolor(edgecolor)

diff --git a/lib/matplotlib/path.py b/lib/matplotlib/path.py
@@ -131,7 +131,7 @@ def __init__(self, vertices, codes=None, _interpolation_steps=1,
 
         if codes is not None:
             codes = np.asarray(codes, self.code_type)
-            if (codes.ndim != 1) or len(codes) != len(vertices):
+            if codes.ndim != 1 or len(codes) != len(vertices):
                 raise ValueError("'codes' must be a 1D list or array with the "
                                  "same length of 'vertices'")
             if len(codes) and codes[0] != self.MOVETO:

diff --git a/lib/matplotlib/tests/test_patches.py b/lib/matplotlib/tests/test_patches.py
@@ -250,7 +250,7 @@ def test_wedge_movement():
                   'theta1': (0, 30, 'set_theta1'),
                   'theta2': (45, 50, 'set_theta2')}
 
-    init_args = dict((k, v[0]) for (k, v) in param_dict.items())
+    init_args = {k: v[0] for k, v in param_dict.items()}
 
     w = mpatches.Wedge(**init_args)
     for attr, (old_v, new_v, func) in param_dict.items():

diff --git a/lib/matplotlib/tests/test_text.py b/lib/matplotlib/tests/test_text.py
@@ -435,7 +435,7 @@ def test_two_2line_texts(spacing1, spacing2):
 
     # line spacing only affects height
     assert box1.width == box2.width
-    if (spacing1 == spacing2):
+    if spacing1 == spacing2:
         assert box1.height == box2.height
     else:
         assert box1.height != box2.height

diff --git a/lib/matplotlib/ticker.py b/lib/matplotlib/ticker.py
@@ -2410,26 +2410,26 @@ def tick_values(self, vmin, vmax):
             ticklocs = []
             if decade_min <= -1:
                 expo = np.arange(decade_min, min(0, decade_max + 1))
-                ticklocs.extend(list(10**expo))
+                ticklocs.extend(10**expo)
             if decade_min <= 0 <= decade_max:
                 ticklocs.append(0.5)
             if decade_max >= 1:
                 expo = -np.arange(max(1, decade_min), decade_max + 1)
-                ticklocs.extend(list(1 - 10**expo))
+                ticklocs.extend(1 - 10**expo)
 
         # minor ticks
         else:
             ticklocs = []
             if decade_min <= -2:
                 expo = np.arange(decade_min, min(-1, decade_max))
                 newticks = np.outer(np.arange(2, 10), 10**expo).ravel()
-                ticklocs.extend(list(newticks))
+                ticklocs.extend(newticks)
             if decade_min <= 0 <= decade_max:
                 ticklocs.extend([0.2, 0.3, 0.4, 0.6, 0.7, 0.8])
             if decade_max >= 2:
                 expo = -np.arange(max(2, decade_min), decade_max + 1)
                 newticks = 1 - np.outer(np.arange(2, 10), 10**expo).ravel()
-                ticklocs.extend(list(newticks))
+                ticklocs.extend(newticks)
 
         return self.raise_if_exceeds(np.array(ticklocs))
 

diff --git a/lib/matplotlib/tri/triinterpolate.py b/lib/matplotlib/tri/triinterpolate.py
@@ -175,7 +175,7 @@ def _interpolate_multikeys(self, x, y, tri_index=None,
         if tri_index is None:
             tri_index = self._trifinder(x, y)
         else:
-            if (tri_index.shape != sh_ret):
+            if tri_index.shape != sh_ret:
                 raise ValueError(
                     "tri_index array is provided and shall"
                     " have same shape as x and y. Given: "

diff --git a/lib/matplotlib/widgets.py b/lib/matplotlib/widgets.py
@@ -413,7 +413,7 @@ def _update(self, event):
             event.canvas.release_mouse(self.ax)
             return
         val = self._value_in_bounds(event.xdata)
-        if (val is not None) and (val != self.val):
+        if val not in [None, self.val]:
             self.set_val(val)
 
     def set_val(self, val):
@@ -474,7 +474,7 @@ def disconnect(self, cid):
 
     def reset(self):
         """Reset the slider to the initial value"""
-        if (self.val != self.valinit):
+        if self.val != self.valinit:
             self.set_val(self.valinit)
 
 

diff --git a/lib/mpl_toolkits/axes_grid1/axes_grid.py b/lib/mpl_toolkits/axes_grid1/axes_grid.py
@@ -169,7 +169,7 @@ def __init__(self, fig,
         if ngrids is None:
             ngrids = self._nrows * self._ncols
         else:
-            if (ngrids > self._nrows * self._ncols) or (ngrids <= 0):
+            if not 0 < ngrids <= self._nrows * self._ncols:
                 raise Exception("")
 
         self.ngrids = ngrids

diff --git a/lib/mpl_toolkits/axisartist/axis_artist.py b/lib/mpl_toolkits/axisartist/axis_artist.py
@@ -216,7 +216,7 @@ def __init__(self, ticksize, tick_out=False, *, axis=None, **kwargs):
         if self._axis is not None:
             if "color" not in kwargs:
                 kwargs["color"] = "auto"
-            if ("mew" not in kwargs) and ("markeredgewidth" not in kwargs):
+            if "mew" not in kwargs and "markeredgewidth" not in kwargs:
                 kwargs["markeredgewidth"] = "auto"
 
         Line2D.__init__(self, [0.], [0.], **kwargs)
@@ -1125,8 +1125,8 @@ def _draw_ticks(self, renderer):
         self.minor_ticks.draw(renderer)
         self.minor_ticklabels.draw(renderer)
 
-
-        if (self.major_ticklabels.get_visible() or self.minor_ticklabels.get_visible()):
+        if (self.major_ticklabels.get_visible()
+                or self.minor_ticklabels.get_visible()):
             self._draw_offsetText(renderer)
 
         return extents
@@ -1169,8 +1169,8 @@ def _draw_ticks2(self, renderer):
         self.minor_ticks.draw(renderer)
         self.minor_ticklabels.draw(renderer)
 
-
-        if (self.major_ticklabels.get_visible() or self.minor_ticklabels.get_visible()):
+        if (self.major_ticklabels.get_visible()
+                or self.minor_ticklabels.get_visible()):
             self._draw_offsetText(renderer)
 
         return self.major_ticklabels.get_window_extents(renderer)

diff --git a/lib/mpl_toolkits/axisartist/floating_axes.py b/lib/mpl_toolkits/axisartist/floating_axes.py
@@ -66,8 +66,7 @@ def get_axislabel_pos_angle(self, axes):
         trans_passingthrough_point = axes.transData + axes.transAxes.inverted()
         p = trans_passingthrough_point.transform_point([xx1[0], yy1[0]])
 
-
-        if (0. <= p[0] <= 1.) and (0. <= p[1] <= 1.):
+        if 0 <= p[0] <= 1 and 0 <= p[1] <= 1:
             xx1c, yy1c = axes.transData.transform_point([xx1[0], yy1[0]])
             xx2, yy2 = grid_finder.transform_xy([xx0+dxx], [yy0+dyy])
             xx2c, yy2c = axes.transData.transform_point([xx2[0], yy2[0]])

diff --git a/lib/mpl_toolkits/axisartist/grid_helper_curvelinear.py b/lib/mpl_toolkits/axisartist/grid_helper_curvelinear.py
@@ -175,8 +175,7 @@ def get_axislabel_pos_angle(self, axes):
         trans_passingthrough_point = axes.transData + axes.transAxes.inverted()
         p = trans_passingthrough_point.transform_point([xx1[0], yy1[0]])
 
-
-        if (0. <= p[0] <= 1.) and (0. <= p[1] <= 1.):
+        if 0 <= p[0] <= 1 and 0 <= p[1] <= 1:
             xx1c, yy1c = axes.transData.transform_point([xx1[0], yy1[0]])
             xx2, yy2 = grid_finder.transform_xy([xx0+dxx], [yy0+dyy])
             xx2c, yy2c = axes.transData.transform_point([xx2[0], yy2[0]])

diff --git a/setupext.py b/setupext.py
@@ -478,7 +478,7 @@ def _check_for_pkg_config(self, package, include_file, min_version=None,
                 "Requires patches that have not been merged upstream.")
 
         if min_version and version != 'unknown':
-            if (not is_min_version(version, min_version)):
+            if not is_min_version(version, min_version):
                 raise CheckFailed(
                     "Requires %s %s or later.  Found %s." %
                     (package, min_version, version))