time

def parse_time(self, date):
    if re.match('刚刚', date):
        date = time.strftime('%Y-%m-%d %H:%M', time.localtime(time.time()))
    if re.match('d+分钟前', date):
        minute = re.match('(d+)', date).group(1)
        date = time.strftime('%Y-%m-%d %H:%M', time.localtime(time.time() - float(minute) * 60))
    if re.match('d+小时前', date):
        hour = re.match('(d+)', date).group(1)
        date = time.strftime('%Y-%m-%d %H:%M', time.localtime(time.time() - float(hour) * 60 * 60))
    if re.match('昨天.*', date):
        date = re.match('昨天(.*)', date).group(1).strip()
        date = time.strftime('%Y-%m-%d', time.localtime() - 24 * 60 * 60) + ' ' + date
    if re.match('d{2}-d{2}', date):
        date = time.strftime('%Y-', time.localtime()) + date + ' 00:00'
    return date

import time;  # 引入time模块

# 当前时间戳
ticks = time.time()
print "当前时间戳为:", ticks         #  1459994552.51

# 获取当前时间
localtime = time.localtime(time.time())
print "本地时间为 :", localtime

import time

# 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"))

# 2016-04-07 10:25:09        #  常用
# Thu Apr 07 10:25:09 2016
# 1459175064.0

import datetime
import json
 
dic = {
    'k1':123,
    'ctime':datetime.datetime.now()
}
 
class MyEncoder(json.JSONEncoder):
    def default(self, o): # o是数据类型
        if isinstance(o,datetime.datetime):
            return o.strftime('%Y-%m-%d')
        else:
            return super(MyEncoder,self).default(o)
 
v = json.dumps(dic,cls=MyEncoder)
print(v)
# {"k1": 123, "ctime": "2018-05-15"}