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Value checking the numpoints argument to be a whole number. #6949

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7 changes: 7 additions & 0 deletions lib/matplotlib/legend.py
Original file line number Diff line number Diff line change
Expand Up @@ -286,6 +286,13 @@ def __init__(self, parent, handles, labels,
ncol = 1
self._ncol = ncol

if (
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It is probably better to do something like if int(n) != n: raise.

Should probably make numpoints a property and do the validation on the way in as well.

This should probably also check that numpoints > 0.

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The check for numpoints > 0 is just below

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So it is 🐑

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Also see discussion at #6955 (diff)

not isinstance(self.numpoints, int) and
not isinstance(self.numpoints, float) and
not self.numpoints.is_integer()
):
raise ValueError("numpoints must be a whole number; it was %f"
% numpoints)
if self.numpoints <= 0:
raise ValueError("numpoints must be > 0; it was %d" % numpoints)

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