python下划線和駝峰互轉

# -*- coding: UTF-8 -*-
# python 3.9.0 64bit


def hump2Underline(text):
    res = []
    for index, char in enumerate(text):
        if char.isupper() and index != 0:
            res.append("_")
        res.append(char)
    return ''.join(res).lower()


def underline2Hump(text):
    arr = text.lower().split('_')
    res = []
    for i in arr:
        res.append(i[0].upper() + i[1:])
    return ''.join(res)