python 数字、字符串与 time时间 的转换

>>> import time
>>> num = time.time()  # 当前时间戳, 7位浮点
>>> type(num)
<class 'float'>
>>> num
1623302086.1892786

>>> t = time.localtime(num) # 数字 转 时间
>>> type(t)
<class 'time.struct_time'>
>>> t
time.struct_time(tm_year=2021, tm_mon=6, tm_mday=10, tm_hour=13, tm_min=14, tm_sec=46, tm_wday=3, tm_yday=161, tm_isdst=0)

>>> dt = time.strftime("%Y-%m-%d %H:%M:%S", t) # 记忆 str from time
>>> dt
'2021-06-10 13:14:46'
>>> type(dt)
<class 'str'>

>>> string = '2021-06-10 13:14:46.123456'
>>> dt1 = time.strptime(string, "%Y-%m-%d %H:%M:%S.%f") # 记忆 str pass to time
>>> dt1
time.struct_time(tm_year=2021, tm_mon=6, tm_mday=10, tm_hour=13, tm_min=14, tm_sec=46, tm_wday=3, tm_yday=161, tm_isdst=-1)
>>> type(dt1)
<class 'time.struct_time'>

>>> num2 = time.mktime(dt1)
>>> type(num2)
<class 'float'>
>>> num2
1623302086.0