Question
Im trying to find out a simple code for the following. def is_a_number(s:str)-> bool: Returns True if and only if s is a string representing
Im trying to find out a simple code for the following.
def is_a_number(s:str)-> bool: Returns True if and only if s is a string representing a positive number.
Examples: >>> is_a_number("1") True >>> is_a_number("One") False >>> is_a_number("-3") False >>> is_a_number("3.") True >>> is_a_number("3.1.2") False
Could I get help?
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Logics For Databases And Information Systems
Authors: Jan Chomicki ,Gunter Saake
1st Edition
1461375827, 978-1461375821
