1. 字符串转时间
from datetime import datetime datetime.strptime(string, "%Y-%m-%d %H:%M:%S")
注意datetime模块中包含datetime类，使用时注意区分。
完整示例：
from datetime import datetime, timedelta
def str2time(string):
return datetime.strptime(string, "%Y-%m-%d %H:%M:%S")
def minus2m(cur_time):
return cur_time - timedelta(minutes=2)
def add2m(cur_time):
return cur_time + timedelta(minutes=2)
if __name__ == "__main__":
print minus2m(str2time("2016-03-29 09:58:00"))
# coding: utf8
from datetime import datetime
print(datetime.now().strftime("%Y-%m-%d"))
print(datetime.now().strftime("%A"))
print(datetime.now().strftime("%H:%M:%S"))