how to check if a string has numbers only python code example

Example 1: python test if number in string

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

Example 2: test if character is number python string

>>> 'A'.isdigit()
False
>>> '1'.isdigit()
True