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Update _isnumber to ensure the output string convertible to float #252

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Update _isnumber to ensure the output string convertible to float #252

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2 changes: 1 addition & 1 deletion tabulate/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -850,7 +850,7 @@ def _isnumber(string):
>>> _isnumber("inf")
True
"""
if not _isconvertible(float, string):
if not _isconvertible(float, str(string)):
return False
elif isinstance(string, (str, bytes)) and (
math.isinf(float(string)) or math.isnan(float(string))
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