使用之前import:
import time,datetime
下面的函式在python2.7裡可以正常執行,但python2.4可能不支援某些方法。比如python2.4.3中報錯:
attributeerror: type object 'datetime.datetime' has no attribute 'strptime'
格式化當前時間則為:
首選:time.strftime('%y-%m-%d %h:%m:%s')
其次:datetime.datetime.strftime(datetime.d atetime.now(), '%y-%m-%d %h:%m:%s')
最後:str(datetime.datetime.now())[:19]
獲取日期差:
oneday = datetime.timedelta(days=1)
today = datetime.date.today()
yesterday = datetime.date.today() - oneday
tomorrow = datetime.date.today() + oneday
today_zero_time = datetime.datetime.strftime(today, '%y-%m-%d %h:%m:%s')
print today_zero_time
2013-05-21 00:00:00
獲取時間差:
oneday = datetime.timedelta(days=1)
today_time = datetime.datetime.now()
yesterday_time = datetime.datetime.now() - oneday
tomorrow_time = datetime.datetime.now() + oneday
注意時間是浮點數,帶毫秒。如下:
print tomorrow_time
2013-05-22 10:34:43.873844
那麼要獲取當前時間,需要格式化一下:
oneday = datetime.timedelta(days=1)
today_time = datetime.datetime.now()
yesterday_time = datetime.datetime.now() - oneday
tomorrow_time = datetime.datetime.now() + oneday
tomorrow_time = datetime.datetime.strftime(today_time, '%y-%m-%d %h:%m:%s')
執行結果如下所示:
print tomorrow_time
2013-05-21 10:34:43
獲取上個月最後一天:
last_month_last_day = datetime.date(datetime.date.today().year,datetime.date.today().month,1)-datetime.timedelta(1)
字串格式轉秒數:
expire_time = "2013-05-21 09:50:35"
d = datetime.datetime.strptime(expire_time,"%y-%m-%d %h:%m:%s")
time_sec_float = time.mktime(d.timetuple())
print time_sec_float
1369101035.0
注意python裡獲取到的是float型別的秒數,而不是整形。如果要獲得整數,可以用int(time_sec_float)
秒數轉字串:
time_sec = time.time()
time.strftime("%y-%m-%d %h:%m:%s", time.localtime(time_sec))
python的時間轉換函式搞得太抽象複雜,因此我包裝了乙個函式,傳入字串可以獲取到時間的各種格式,傳入秒數可以獲取字串格式時間(這個是很簡單的),還傳入兩個字串格式的時間,以計算他們的時間差。
#coding=gbk
import time, datetime
# 傳入乙個字串格式的時間2013-05-21 14:31:23,可以得到各種格式的時間
class timeformat:
def __init__(self, time_string="1970-1-1 00:00:00"):
self.time_string = self._format_time_string(time_string)
def _format_time_string(self, time_string):
return time.strftime("%y-%m-%d %h:%m:%s", self.get_struct(time_string))
@property
def time_struct(self):
return self.get_struct(self.time_string)
def get_struct(self, time_string):
return time.localtime(self.get_seconds(time_string))
@property
def seconds(self):
return self.get_seconds(self.time_string)
def get_seconds(self, time_string):
d = datetime.datetime.strptime(time_string, "%y-%m-%d %h:%m:%s")
return time.mktime(d.timetuple())
def get_string(self, time_sec):
return time.strftime("%y-%m-%d %h:%m:%s", time.localtime(time_sec))
# 對於中國的時間,是1970-01-01 08:00:00
def check_diff_time(self, t1, t2):
sec1 = int(self.get_seconds(t1))
sec2 = int(self.get_seconds(t2))
if sec1 > sec2:
secdiff = sec1 - sec2
else:
secdiff = sec2 - sec1
d = self.get_struct(self.get_string(secdiff))
day = d.tm_mday
hour = d.tm_hour
if d.tm_hour < 8:
day -= 1
hour = 24 + (d.tm_hour - 8)
else:
hour = d.tm_hour - 8
return
if __name__ == "__main__":
t1 = timeformat("2015-04-01 12:23:23")
t2 = timeformat("2014-03-10 22:23:23")
print t1.seconds
print t2.seconds
d = t1.check_diff_time(t1.time_string, t2.time_string)
print "%s 和 %s 時間差為:%s年%s月%s天%s小時%s分%s秒" %(t1.time_string, t2.time_string, d["year"], d["month"], d["day"], d["hour"], d["min"], d["sec"])
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