python日期与时间戳的各种转换示例

# coding: utf-8
from datetime import datetime
import time

s = '2019-06-07 16:30:10'
f = '%Y-%m-%d %H:%M:%S'
s2 = 'Fri Jun 7 16:30:10 2019'
f2 = '%c'

// 时间字符串转时间戳, 时间字串 s和format 对应
// int(t) 转为整型
t = datetime.strptime(s, f).timestamp() # 1559856210.0
t2 = time.mktime(time.strptime(s, f)) # 1559856210.0
t3 = time.mktime(time.strptime(s2, f2)) # 1559856210.0
t4 = datetime.strptime(s2, f2).timestamp() # 1559856210.0
t5 = datetime.strptime('2019-06-07', '%Y-%m-%d').timestamp() # 1559836800.0
t6 = datetime.strptime('06/07/19', '%x').timestamp() # 1559836800.0 (06/07/2019, '%m/%d/%Y')
print(t, t2, t3, t4, t5, t6, "\n")

ut = 1559896210
# 时间戳转为时间字符串
d = datetime.fromtimestamp(ut) # 2019-06-07 16:30:10
d2 = time.strftime(f, time.localtime(ut)) # 2019-06-07 16:30:10
d3 = time.ctime(ut) # Fri Jun 7 16:30:10 2019
d4 = datetime.fromtimestamp(ut).ctime() # Fri Jun 7 16:30:10 2019
d5 = time.strftime('%Y-%m-%d', time.localtime(ut)) # 2019-06-07 (05:23:30, %H:%M:%S)
d6 = datetime.fromtimestamp(ut).date() # 2019-06-07
d7 = datetime.fromtimestamp(ut).time() # 16:30:10
d8 = time.strftime('%x', time.localtime(ut)) # 06/07/19
d9 = time.strftime('%X', time.localtime(ut)) # 16:30:10
dd = datetime.fromtimestamp(ut).strftime('%x') # 06/07/19 [(16:30:10, %X), (Fri Jun 7 16:30:10 2019, %c)]
print(d, d2, d3, d4, d5, d6, d7, d8, d9, dd, "\n")

# 格式转换
# 将 2019-06-07 16:30:10 转为 Fri Jun 7 16:30:10 2019
# (16:30:10, %X)
transf = datetime.strptime(s, f).strftime(f2)
# 将 Fri Jun 7 16:30:10 2019 转为 2019-06-07
# (2019-06-07 16:30:10, %Y-%m-%d %H:%M:%S)
transf2 = datetime.strptime(s2, f2).strftime('%Y-%m-%d')
# 将 2019-06-07 16:30:10 转为 Fri Jun 7 16:30:10 2019
# (2019-06-07 16:30:10, %Y-%m-%d %H:%M:%S)
transf3 = time.strftime('%c', time.strptime(s, f))
# 将 Fri Jun 7 16:30:10 2019 转为 2019-06-07 16:30:10
transf4 = time.strftime(f, time.strptime(s2, f2))
print(transf, transf2, transf3, transf4)