Python uses the custom isnumber function to determine whether a string is a number.

Python uses the custom isnumber function to determine whether a string is a number.

This example describes how to use a custom isnumber function to determine whether a string is a number. Share it with you for your reference. The details are as follows:

''' Isnumeric. pytest a numeric string s if it's usablefor int (s) or float (s) ''' def isnumeric (s ): '''returns True if string s is numeric ''' return all (c in "0123456789. +-"for c in s) # test module... if _ name _ = '_ main _': print (isnumeric ('000000') # True print (isnumeric ('-123 ')) # True print (isnumeric ('+ 3.14') # True print (isnumeric ('$99.95') # False

I hope this article will help you with Python programming.