python 利用datetime 模块计算时间差 当前时间多加一天 一小时 一分钟等操作

1. 常用操作

from datetime import datetimeaa = datetime.now()print(aa) # datetime.datetime(, 9, 24, 16, 28, 11, 984000)print(str(aa)) # '-9-24 16:28:11.984000'bb = datetime.strptime(str(aa),"%Y-%m-%d %H:%M:%S.%f")# 输出 datetime.datetime(, 10, 9, 16, 28, 11, 984000)

2. 字符串格式转换datetime日期格式

aa = datetime.datetime.strptime('-10-11', '%Y-%m-%d')# datetime.datetime(, 10, 11, 0, 0)

3. datetime日期格式转换成字符串

today = datetime.datetime.now()now = datetime.datetime.strftime(today, '%Y-%m-%d')# '-10-12'

4. 计算两个日期相差的天数、秒数

from datetime import datetimeaa = datetime.now()time.sleep(100)bb = datetime.now()(bb-aa).days(bb-aa).seconds(bb-aa).total_seconds

5. 多加一天、一小时、一分钟

# 多加一天a = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')# '-10-12 15:52:09'b = (datetime.datetime.now()+datetime.timedelta(days=1)).strftime('%Y-%m-%d %H:# '-10-13 15:52:15'# 多加一小时a = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')# '-10-12 15:50:54'b = (datetime.datetime.now()+datetime.timedelta(hours=1)).strftime('%Y-%m-%d %H# '-10-12 16:50:56'# 多加一分钟a = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')# '-10-12 15:54:13'b = (datetime.datetime.now()+datetime.timedelta(minutes=1)).strftime('%Y-%m-%d %H:%M:%S')# '-10-12 15:55:30'