python 利用切片去除首尾空

#!/usr/bin/env python 
# -*- coding:utf-8 -*-
#python 利用切片去除首尾空
def trim(text):
    while True:
        if text[:1] == " ":
            text = text[1:]
            print(text)
        else:
            break
    while True:
        if text[-1] == " ":
            text = text[:-1]
            print(text)
        else:
            break
    return
trim("  康师傅  ")