图解Python时间和日期time和datetime数据类型转换

前言

Python版本：3.7.4
主要内容：时间数据类型转换

4大数据类型

import time, datetime
_print = lambda x: print('\033[033m%s\033[0m' % type(x), x)
_print(time.time())  # 秒数
_print(time.strftime('%Y-%m-%d'))
_print(time.localtime())
_print(datetime.datetime.now())

<class 'float'> 1582599349.6660724
<class 'str'> 2020-02-25
<class 'time.struct_time'> time.struct_time(tm_year=2020, tm_mon=2, tm_mday=25, tm_hour=10, tm_min=55, tm_sec=49, tm_wday=1, tm_yday=56, tm_isdst=0)
<class 'datetime.datetime'> 2020-02-25 10:55:49.666072

图解

time.struct_time

time.struct_time ⇌ str

import time
t = time.localtime()
print(t)
t = time.strftime('%Y-%m-%d %H:%M:%S', t)
print(t)
t = time.strptime(t, '%Y-%m-%d %H:%M:%S')
print(t)

打印结果

time.struct_time(tm_year=2020, tm_mon=2, tm_mday=25, tm_hour=12, tm_min=31, tm_sec=4, tm_wday=1, tm_yday=56, tm_isdst=0)
2020-02-25 12:31:04
time.struct_time(tm_year=2020, tm_mon=2, tm_mday=25, tm_hour=12, tm_min=31, tm_sec=4, tm_wday=1, tm_yday=56, tm_isdst=-1)

time.struct_time ⇌ float

import time
t = time.time()  # 秒数
print(t)
t = time.localtime(t)
print(t)
t = time.mktime(t)
print(t)

打印结果

1582609210.184097
time.struct_time(tm_year=2020, tm_mon=2, tm_mday=25, tm_hour=13, tm_min=40, tm_sec=10, tm_wday=1, tm_yday=56, tm_isdst=0)
1582609210.0

datetime.datetime

datetime.datetime ⇌ str

import datetime
t = datetime.datetime.now()
print(t, type(t))
t = t.strftime('%Y-%m-%d %H:%M:%S')
print(t, type(t))
t = datetime.datetime.strptime(t, '%Y-%m-%d %H:%M:%S')
print(t, type(t))

打印结果

2020-02-25 14:13:55.824529 <class 'datetime.datetime'>
2020-02-25 14:13:55 <class 'str'>
2020-02-25 14:13:55 <class 'datetime.datetime'>

datetime.datetime ⇌ float

import datetime
_print = lambda x: print('\033[033m%s\033[0m' % type(x), x)
t = datetime.datetime.now()
_print(t)
t = t.timestamp()  # 秒数
_print(t)
t = datetime.datetime.fromtimestamp(t)
_print(t)

打印结果

<class 'datetime.datetime'> 2020-02-26 23:28:08.531932
<class 'float'> 1582730888.531932
<class 'datetime.datetime'> 2020-02-26 23:28:08.531932

datetime.datetime ⇌ time.struct_time

import datetime, time
_print = lambda x: print('\033[033m%s\033[0m' % type(x), x)
t = datetime.datetime.now()
_print(t)
t = t.timetuple()
_print(t)
t = datetime.datetime(*t[:6])
_print(t)

打印结果

<class 'datetime.datetime'> 2020-02-26 23:43:48.377120
<class 'time.struct_time'> time.struct_time(tm_year=2020, tm_mon=2, tm_mday=26, tm_hour=23, tm_min=43, tm_sec=48, tm_wday=2, tm_yday=57, tm_isdst=-1)
<class 'datetime.datetime'> 2020-02-26 23:43:48

Appendix

en	cn
struct	结构
stamp	邮票；印记
timestamp	n. 时间戳
DST（daylight saving time）	夏令时