Human: Give me a Python function to check if it is a string or not. Assistant: 
Here is a Python function to check if it is a string or not

import re

def is_string(s):
    """Check if it is a string or not."""
    return isinstance(s, str)

# Enter the string
s = "hello"

# Calling the function
print((is_string(s)))

#Example Output
# True

#Remember to inspect code for bugs.