Python項(xiàng)目中很多時(shí)候會(huì)需要將時(shí)間在Datetime格式和TimeStamp格式之間轉(zhuǎn)化，又或者你需要將UTC時(shí)間轉(zhuǎn)化為本地時(shí)間，本文總結(jié)了這幾個(gè)時(shí)間之間轉(zhuǎn)化的函數(shù)，供大家參考。
一、Datetime轉(zhuǎn)化為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: # 是否轉(zhuǎn)化為UTC時(shí)間
dt = dt + datetime.timedelta(hours=-8) # 中國默認(rèn)時(shí)區(qū)
timestamp = total_seconds(dt - EPOCH)
return long(timestamp)
return dt
二、TimeStamp轉(zhuǎn)化為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: # 是否轉(zhuǎn)化為本地時(shí)間
dt = dt + datetime.timedelta(hours=8) # 中國默認(rèn)時(shí)區(qū)
return dt
return timestamp
三、當(dāng)前UTC時(shí)間的TimeStamp
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def timestamp_utc_now():
return datetime2timestamp(datetime.datetime.utcnow())
四、當(dāng)前本地時(shí)間的TimeStamp
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def timestamp_now():
return datetime2timestamp(datetime.datetime.now())
五、UTC時(shí)間轉(zhuǎn)化為本地時(shí)間
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# 需要安裝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")
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