python 常用的函数

python timestamp和datetime之间的转换

1. 字符串日期时间转换成时间戳

   # '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.时间戳转换成字符串日期时间

# 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 ''  

原文地址：https://www.cnblogs.com/daihanlong/p/8564163.html