Determine if a string is numeric: Difference between revisions
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"inf" -> inf <class 'float'> is_numeric: True str.isnumeric: False |
"inf" -> inf <class 'float'> is_numeric: True str.isnumeric: False |
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"-Infinity" -> -inf <class 'float'> is_numeric: True str.isnumeric: False</pre> |
"-Infinity" -> -inf <class 'float'> is_numeric: True str.isnumeric: False</pre> |
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===Python: Regular expressions== |
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<lang python>import re |
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numeric = re.compile('[-+]?(\d+(\.\d*)?|\.\d+)([eE][-+]?\d+)?') |
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is_numeric = lambda x: numeric.fullmatch(x) != None |
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is_numeric('123.0')</lang> |
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=={{header|Quackery}}== |
=={{header|Quackery}}== |
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