matplotlib · QuLogic · Apr 26, 2021 · Apr 25, 2021 · QuLogic · Apr 26, 2021
diff --git a/examples/lines_bars_and_markers/filled_step.py b/examples/lines_bars_and_markers/filled_step.py
@@ -7,7 +7,6 @@
 """
 
 import itertools
-from collections import OrderedDict
 from functools import partial
 
 import numpy as np
@@ -188,7 +187,7 @@ def stack_hist(ax, stacked_data, sty_cycle, bottoms=None,
 np.random.seed(19680801)
 
 stack_data = np.random.randn(4, 12250)
-dict_data = OrderedDict(zip((c['label'] for c in label_cycle), stack_data))
+dict_data = dict(zip((c['label'] for c in label_cycle), stack_data))
 
 ###############################################################################
 # Work with plain arrays

diff --git a/lib/matplotlib/_color_data.py b/lib/matplotlib/_color_data.py
@@ -1,6 +1,3 @@
-from collections import OrderedDict
-
-
 BASE_COLORS = {
     'b': (0, 0, 1),        # blue
     'g': (0, 0.5, 0),      # green
@@ -14,22 +11,19 @@
 
 
 # These colors are from Tableau
-TABLEAU_COLORS = (
-    ('blue', '#1f77b4'),
-    ('orange', '#ff7f0e'),
-    ('green', '#2ca02c'),
-    ('red', '#d62728'),
-    ('purple', '#9467bd'),
-    ('brown', '#8c564b'),
-    ('pink', '#e377c2'),
-    ('gray', '#7f7f7f'),
-    ('olive', '#bcbd22'),
-    ('cyan', '#17becf'),
-)
+TABLEAU_COLORS = {
+    'tab:blue': '#1f77b4',
+    'tab:orange': '#ff7f0e',
+    'tab:green': '#2ca02c',
+    'tab:red': '#d62728',
+    'tab:purple': '#9467bd',
+    'tab:brown': '#8c564b',
+    'tab:pink': '#e377c2',
+    'tab:gray': '#7f7f7f',
+    'tab:olive': '#bcbd22',
+    'tab:cyan': '#17becf',
+}
 
-# Normalize name to "tab:<name>" to avoid name collisions.
-TABLEAU_COLORS = OrderedDict(
-    ('tab:' + name, value) for name, value in TABLEAU_COLORS)
 
 # This mapping of color names -> hex values is taken from
 # a survey run by Randall Munroe see:

diff --git a/lib/matplotlib/artist.py b/lib/matplotlib/artist.py
@@ -1,4 +1,4 @@
-from collections import OrderedDict, namedtuple
+from collections import namedtuple
 from functools import wraps
 import inspect
 import logging
@@ -1683,8 +1683,7 @@ def setp(obj, *args, file=None, **kwargs):
     if len(args) % 2:
         raise ValueError('The set args must be string, value pairs')
 
-    # put args into ordereddict to maintain order
-    funcvals = OrderedDict((k, v) for k, v in zip(args[::2], args[1::2]))
+    funcvals = dict(zip(args[::2], args[1::2]))
     ret = [o.update(funcvals) for o in objs] + [o.set(**kwargs) for o in objs]
     return list(cbook.flatten(ret))
 

diff --git a/lib/matplotlib/backends/backend_pdf.py b/lib/matplotlib/backends/backend_pdf.py
@@ -5,7 +5,6 @@
 """
 
 import codecs
-import collections
 from datetime import datetime
 from enum import Enum
 from functools import total_ordering
@@ -682,15 +681,14 @@ def __init__(self, filename, metadata=None):
         self._soft_mask_states = {}
         self._soft_mask_seq = (Name(f'SM{i}') for i in itertools.count(1))
         self._soft_mask_groups = []
-        # reproducible writeHatches needs an ordered dict:
-        self.hatchPatterns = collections.OrderedDict()
+        self.hatchPatterns = {}
         self._hatch_pattern_seq = (Name(f'H{i}') for i in itertools.count(1))
         self.gouraudTriangles = []
 
-        self._images = collections.OrderedDict()   # reproducible writeImages
+        self._images = {}
         self._image_seq = (Name(f'I{i}') for i in itertools.count(1))
 
-        self.markers = collections.OrderedDict()   # reproducible writeMarkers
+        self.markers = {}
         self.multi_byte_charprocs = {}
 
         self.paths = []

diff --git a/lib/matplotlib/backends/backend_svg.py b/lib/matplotlib/backends/backend_svg.py
@@ -1,4 +1,3 @@
-from collections import OrderedDict
 import base64
 import datetime
 import gzip
@@ -287,10 +286,10 @@ def __init__(self, width, height, svgwriter, basename=None, image_dpi=72,
         self._groupd = {}
         self.basename = basename
         self._image_counter = itertools.count()
-        self._clipd = OrderedDict()
+        self._clipd = {}
         self._markers = {}
         self._path_collection_id = 0
-        self._hatchd = OrderedDict()
+        self._hatchd = {}
         self._has_gouraud = False
         self._n_gradients = 0
 
@@ -1174,7 +1173,7 @@ def _draw_text_as_text(self, gc, x, y, s, prop, angle, ismath, mtext=None):
             writer.start('text')
 
             # Sort the characters by font, and output one tspan for each.
-            spans = OrderedDict()
+            spans = {}
             for font, fontsize, thetext, new_x, new_y in glyphs:
                 style = generate_css({
                     'font-size': short_float_fmt(fontsize) + 'px',

diff --git a/lib/matplotlib/tests/test_rcparams.py b/lib/matplotlib/tests/test_rcparams.py
@@ -1,4 +1,3 @@
-from collections import OrderedDict
 import copy
 import os
 from pathlib import Path
@@ -460,8 +459,7 @@ def test_rcparams_reset_after_fail():
     with mpl.rc_context(rc={'text.usetex': False}):
         assert mpl.rcParams['text.usetex'] is False
         with pytest.raises(KeyError):
-            with mpl.rc_context(rc=OrderedDict([('text.usetex', True),
-                                                ('test.blah', True)])):
+            with mpl.rc_context(rc={'text.usetex': True, 'test.blah': True}):
                 pass
         assert mpl.rcParams['text.usetex'] is False
 

diff --git a/lib/matplotlib/tests/test_style.py b/lib/matplotlib/tests/test_style.py
@@ -1,4 +1,3 @@
-from collections import OrderedDict
 from contextlib import contextmanager
 import gc
 from pathlib import Path
@@ -138,10 +137,9 @@ def test_context_with_union_of_dict_and_namedstyle():
 def test_context_with_badparam():
     original_value = 'gray'
     other_value = 'blue'
-    d = OrderedDict([(PARAM, original_value), ('badparam', None)])
     with style.context({PARAM: other_value}):
         assert mpl.rcParams[PARAM] == other_value
-        x = style.context([d])
+        x = style.context({PARAM: original_value, 'badparam': None})
         with pytest.raises(KeyError):
             with x:
                 pass

diff --git a/tutorials/colors/colormaps.py b/tutorials/colors/colormaps.py
@@ -78,9 +78,9 @@
 import matplotlib.pyplot as plt
 from matplotlib import cm
 from colorspacious import cspace_converter
-from collections import OrderedDict
 
-cmaps = OrderedDict()
+
+cmaps = {}
 
 ###############################################################################
 # Sequential