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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