Python項目中很多時候會需要將時間在Datetime格式和TimeStamp格式之間轉化，又或者你需要將UTC時間轉化為本地時間，本文總結了這幾個時間之間轉化的函數，供大家參考。

一、Datetime轉化為TimeStamp
 

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: # 是否轉化為UTC時間      dt = dt + datetime.timedelta(hours=-8) # 中國默認時區    timestamp = total_seconds(dt - EPOCH)    return long(timestamp)  return dt

二、TimeStamp轉化為Datetime
 

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: # 是否轉化為本地時間      dt = dt + datetime.timedelta(hours=8) # 中國默認時區    return dt  return timestamp

三、當前UTC時間的TimeStamp
 

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

四、當前本地時間的TimeStamp
 

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

五、UTC時間轉化為本地時間
 

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