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TST/VIZ: add test for legend colors for DataFrame with duplicate column labels #11136 #32451

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merged 4 commits into from
Mar 12, 2020
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TST/VIZ: add test for legend colors for DataFrame with duplicate column labels #11136 #32451

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9785061
Test added for the issue #11136
gabrielvf1 Mar 4, 2020
e619779
black pandas ok, git diff ok
gabrielvf1 Mar 4, 2020
56ec903
Resolving comments and details
gabrielvf1 Mar 9, 2020
4c0701f
changing private variables to use matplotlib methods, and changing th…
gabrielvf1 Mar 10, 2020
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10 changes: 10 additions & 0 deletions pandas/tests/plotting/test_frame.py
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Expand Up @@ -3316,6 +3316,16 @@ def test_missing_markers_legend_using_style(self):
self._check_legend_labels(ax, labels=["A", "B", "C"])
self._check_legend_marker(ax, expected_markers=[".", ".", "."])

def test_colors_of_columns_with_same_name(self):
# ISSUE 11136 -> https://github.com/pandas-dev/pandas/issues/11136
# Creating a DataFrame with duplicate column labels and testing colors of them.
df = pd.DataFrame({"b": [0, 1, 0], "a": [1, 2, 3]})
df1 = pd.DataFrame({"a": [2, 4, 6]})
df_concat = pd.concat([df, df1], axis=1)
result = df_concat.plot()
for legend, line in zip(result.get_legend().legendHandles, result.lines):
assert legend.get_color() == line.get_color()


def _generate_4_axes_via_gridspec():
import matplotlib.pyplot as plt
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