python 格式化日期

# -*- coding:utf-8 -*-
import time
#当前时间
print time.time()
#时间戳形式

print time.localtime(time.time())
#简单可读形式

print time.asctime( time.localtime(time.time()) )
##变成了 Thu May 31 16:32:18 2018

# 格式化成2016-03-20 11:45:39形式
print time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()) 
# 格式化成Sat Mar 28 22:24:24 2016形式
print time.strftime("%a %b %d %H:%M:%S %Y", time.localtime()) 

# 将格式字符串转换为时间戳
a = "Sat Mar 28 22:24:24 2016"
print time.mktime(time.strptime(a,"%a %b %d %H:%M:%S %Y"))

1481036968.19
time.struct_time(tm_year=2016, tm_mon=12, tm_mday=6, tm_hour=23, tm_min=9, tm_sec=28, tm_wday=1, tm_yday=341, tm_isdst=0)
Tue Dec 06 23:09:28 2016
2016-12-06 23:09:28
Tue Dec 06 23:09:28 2016
1459175064.0

# -*- coding:utf-8 -*-
import time
import sys
import os
#判断当前时间是否超过某个输入的时间
def Fuctime(s):
    if time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time()))>s:
        return True
    else:
        return False

while(1):
    if Fuctime('2016-12-05 00:00:00'):
        #调用某个路径下的脚本的简便方法
        os.system("python ./../day_2/Prime.py ./../day_2/inti_prime.txt ./../day_2/res_prime.txt")
        break
    else:
        time.sleep(1800)
        continue

# Filename : test.py
# author by : www.runoob.com

# 引入 datetime 模块
import datetime
def getYesterday(): 
    today=datetime.date.today() 
    oneday=datetime.timedelta(days=1) 
    yesterday=today-oneday  
    return yesterday

# 输出
print(getYesterday())