"""
Project: Regex Version of the strip() Method
Page 186
"""

import re

tests = {
    "Hola": None,
    " Hola ": None,
    "bHola": "b",
    "\tHola,\tmundo\t": "\t",
}


def rgx_strip(string, char=" "):
    string = re.sub(r"^" + char + r"+", "", string)
    return re.sub(char + r"+$", "", string)


for key, val in tests.items():
    if val is None:
        print(f"'{key}' -> '{rgx_strip(key)}'")
    else:
        print(f"'{key}' -> '{rgx_strip(key, val)}'")