Python中实现对Timestamp与DateTime及UTC时间之间的转换

Python项目中很多时候会需要将时间在Datetime格式和TimeStamp格式之间转化，又或者你需要将UTC时间转化为本地时间，本文总结了这几个时间之间转化的函数，供大家参考。

一、Datetime转化为TimeStamp
 

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def datetime2timestamp(dt, convert_to_utc=False):   ''' Converts a datetime object to UNIX timestamp in milliseconds. '''   if isinstance(dt, datetime.datetime):     if convert_to_utc: # 是否转化为UTC时间       dt = dt + datetime.timedelta(hours=-8) # 中国默认时区     timestamp = total_seconds(dt - EPOCH)     return long(timestamp)   return dt

 

 

二、TimeStamp转化为Datetime
 

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def timestamp2datetime(timestamp, convert_to_local=False):   ''' Converts UNIX timestamp to a datetime object. '''   if isinstance(timestamp, (int, long, float)):     dt = datetime.datetime.utcfromtimestamp(timestamp)     if convert_to_local: # 是否转化为本地时间       dt = dt + datetime.timedelta(hours=8) # 中国默认时区     return dt   return timestamp

 

 

三、当前UTC时间的TimeStamp
 

1 2	def timestamp_utc_now():   return datetime2timestamp(datetime.datetime.utcnow())

 

 

四、当前本地时间的TimeStamp
 

1 2	def timestamp_now():   return datetime2timestamp(datetime.datetime.now())

 

 

五、UTC时间转化为本地时间
 

 

 

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# 需要安装python-dateutil # Ubuntu下：sudo apt-get install python-dateutil # 或者使用PIP：sudo pip install python-dateutil from dateutil import tz from dateutil.tz import tzlocal from datetime import datetime    # get local time zone name print datetime.now(tzlocal()).tzname()    # UTC Zone from_zone = tz.gettz('UTC') # China Zone to_zone = tz.gettz('CST')    utc = datetime.utcnow()    # Tell the datetime object that it's in UTC time zone utc = utc.replace(tzinfo=from_zone)    # Convert time zone local = utc.astimezone(to_zone) print datetime.strftime(local, "%Y-%m-%d %H:%M:%S")