python 常用的函數

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python timestamp和datetime之間的轉換

1. 字串日期時間轉換成時間戳記

   # '2015-08-28 16:43:37.283' --> 1440751417.283  # 或者 '2015-08-28 16:43:37' --> 1440751417.0  def string2timestamp(strValue):  try:              d = datetime.datetime.strptime(strValue, "%Y-%m-%d %H:%M:%S.%f")      t = d.timetuple()      timeStamp = int(time.mktime(t))      timeStamp = float(str(timeStamp) + str("%06d" % d.microsecond))/1000000      print timeStamp      return timeStamp  except ValueError as e:      print e      d = datetime.datetime.strptime(str2, "%Y-%m-%d %H:%M:%S")      t = d.timetuple()      timeStamp = int(time.mktime(t))      timeStamp = float(str(timeStamp) + str("%06d" % d.microsecond))/1000000      print timeStamp      return timeStamp  

2.時間戳記轉換成字串日期時間

# 1440751417.283 --> '2015-08-28 16:43:37.283'  def timestamp2string(timeStamp):      try:          d = datetime.datetime.fromtimestamp(timeStamp)          str1 = d.strftime("%Y-%m-%d %H:%M:%S.%f")          # 2015-08-28 16:43:37.283000'          return str1      except Exception as e:          print e          return ''  

python 常用的函數