Check if a string contains a number Check if a string contains a number python python

Check if a string contains a number


You can use any function, with the str.isdigit function, like this

>>> def has_numbers(inputString):...     return any(char.isdigit() for char in inputString)... >>> has_numbers("I own 1 dog")True>>> has_numbers("I own no dog")False

Alternatively you can use a Regular Expression, like this

>>> import re>>> def has_numbers(inputString):...     return bool(re.search(r'\d', inputString))... >>> has_numbers("I own 1 dog")True>>> has_numbers("I own no dog")False


You can use a combination of any and str.isdigit:

def num_there(s):    return any(i.isdigit() for i in s)

The function will return True if a digit exists in the string, otherwise False.

Demo:

>>> king = 'I shall have 3 cakes'>>> num_there(king)True>>> servant = 'I do not have any cakes'>>> num_there(servant)False


use

str.isalpha() 

Ref: https://docs.python.org/2/library/stdtypes.html#str.isalpha

Return true if all characters in the string are alphabetic and there is at least one character, false otherwise.


matomo