how to search a substring in a string python code example

Example 1: how to check for a substring in python

def find_string(string,sub_string):
	return string.find(sub_string)
#.find() also accounts for multiple occurence of the substring in the given string

Example 2: python check if value in string

def is_value_in_string(value: str, the_string: str):
    return value in the_string.lower()