python 时间感觉能用到的

datetime, string, timestamp 互转

  import time
  import datetime

  print datetime.datetime.now()
  print datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')                     # datetime into string
  print datetime.datetime.strptime("2017-03-02 20:17:05", '%Y-%m-%d %H:%M:%S')    # string into datetime
  print time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(1488457347.51))         # timestamp to string  
  print date.fromtimestamp(time.time())

date

  import date
  from datetime import date, timedelta

  #今天的日期(yyyy-MM-dd)
  now = date.today()
  #本月7号
  seven_day = now.replace(day=7)
  
  # 7号和今天的时间间隔(5days, 0:00:00)
  delta = seven_day - now

  #date 加时间间隔
  print now + delta

  # 'get the seven days after today'
  for i in range(0, 9):
    print now + timedelta(days=i)

  now = datetime.datetime(2017, 1, 1, 0, 0, 0)
  for i in range(9):
    print (now + timedelta(days=1)).strftime('%Y-%m-%d %H:%M:%S')
  print  date(2017, 2, 1) - date(2017, 1, 1)
  print  date(2017, 3, 1) - date(2017, 2, 1)

  #python 不能用timedelta在月上加1，可以这么获取下个月的今天
  dt = date.today()
  print date(dt.year, dt.month + 1, dt.day)
  
  print "*" * 100, 'time'
  tm = datetime.time(23, 30, 0)
  print tm
  print tm.hour, tm.minute, tm.second, tm.microsecond