python 时间格式转换

1、获取当前时间

from datetime import datetime 
datetime_object = datetime.now()
2021-12-15 14:18:48.711364
<'datetime'>

d1 = datetime.now().replace(microsecond=0)
2021-12-15 14:20:44
<'datetime'>

d1 = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
2021-12-15 14:30:09
<'str'>

2、获取时间戳

d2 = datetime.timestamp(datetime.now())
1639554245.122323
< 'float'>

d2 = int(time.time())
1639554245
< 'int'>

3、时间格式转换

str --> datetime 
date_str = "2021-11-30 13:53:59"
d4 = datetime.strptime(date_str, "%Y-%m-%d %H:%M:%S")
<'datetime'>

datetime --> str
dt_obj = datetime(2020, 11, 30, 13, 53, 59)
d5 = dt_obj.strftime("%Y-%m-%d %H:%M:%S")
<'str'>

timestamp --> datetime
timestamp = 1480486369
d6 = datetime.fromtimestamp(timestamp)
<'datetime'>

datetime  --> timestamp
d7 = time.mktime(d6.timetuple())
< 'float'>