8000 Clarifying an error message by AllenDowney · Pull Request #11772 · matplotlib/matplotlib · GitHub
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Clarifying an error message #11772

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Jul 25, 2018
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Clarifying an error message #11772

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2 changes: 1 addition & 1 deletion lib/matplotlib/axes/_base.py
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Original file line number Diff line number Diff line change
Expand Up @@ -350,7 +350,7 @@ def _plot_args(self, tup, kwargs):
# to one element array of None which causes problems
# downstream.
if any(v is None for v in tup):
raise ValueError("x and y must not be None")
raise ValueError("x, y, and format string must not be None")
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Huh, you shouldn't have got here according to the logic above.... I think you've actually found a bug, not a documentation error...


kw = {}
for k, v in zip(('linestyle', 'marker', 'color'),
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