python：将时间戳转换成格式化日期

import time# 将时间戳转换成格式化日期def timestamp_to_str(timestamp=None, format='%Y-%m-%d %H:%M:%S'):if timestamp:time_tuple = time.localtime(timestamp) # 把时间戳转换成时间元祖result = time.strftime(format, time_tuple) # 把时间元祖转换成格式化好的时间return resultelse:return time.strptime(format)