time,datetime模块

time模块

时间戳

返回1970年1月1日 00：00：00开始按秒计算时间偏移量

time_stamp = time.time()
print(time_stamp,type(time_stamp))
>>>1569671240.0007255 <class 'float'>

格式化时间

format_time = time.strfttime("%Y-%m-%d %X")
print(format_time, type(format_time))
>>>2019-09-28 19:51:09 <class 'str'>

time.strfttime(参数)

%Y  Year with century as a decimal number.
%m  Month as a decimal number [01,12].
%d  Day of the month as a decimal number [01,31].
%H  Hour (24-hour clock) as a decimal number [00,23].
%M  Minute as a decimal number [00,59].
%S  Second as a decimal number [00,61].
%z  Time zone offset from UTC.

• time.sleep(s) 睡s秒

datetime模块

参数列表

year=1949, 
month=10, 
day=1, 
hour=10, 
minute=1, 
second=0, 
microsecond=0

返回当前时间

now = datetime.datetime.now()
print(now)

更改时间

print(datetime.datetime.now() + datetime.timedelta(3))

默认更改天，可使用参数进行更改

时间替换

print(now.replace(year=1949, month=10, day=1, hour=10, minute=1, second=0, microsecond=0))