時間戳(timestamp)、時間字串(datetimestr)、時間(datetime)之間的相互轉換
阿新 • • 發佈:2018-12-18
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# 時間戳轉時間字串(timestamp to datetimeStr)
def timestampToDateStr(stamps, frmt='%Y-%m-%d %H:%M:%S'):
# return time.strftime(frmt, time.localtime(stamps))
return datetime.fromtimestamp(stamps).strftime(frmt)
# 時間字串轉時間戳(datetimeStr to timestamp)
def dateStrToTimestamp(str_, frmt='%Y-%m-%d %H:%M:%S' ):
# return time.mktime(datetime.strptime(str_, frmt).timetuple())
return time.mktime(time.strptime(str_, frmt))
# 時間字串轉時間(datetimeStr to datetime)
def dateStrToDate(str_, frmt='%Y-%m-%d %H:%M:%S'):
return datetime.strptime(str_, frmt)
# 時間轉時間字串(datetime to datetimeStr)
def dateToDateStr (date_, frmt='%Y-%m-%d %H:%M:%S'):
return date_.strftime(frmt)
# 時間戳轉時間(datetime to timestamp)
def timestampToDate(stamps):
return datetime.fromtimestamp(stamps)
# 時間轉時間戳(timestamp to datetime)
def dateToTimestamp(date_):
return time.mktime(date_.timetuple())
# 測試用例
dateStr = '2018-06-02 12:12:12'
stamps = 1527912732.0
lenth = 10
print(timestampToDateStr(stamps), type(timestampToDateStr(stamps)))
print(dateStrToTimestamp(dateStr), type(dateStrToTimestamp(dateStr)))
print(dateStrToDate(dateStr), type(dateStrToDate(dateStr)))
print(dateToDateStr(dateStrToDate(dateStr)), type(dateToDateStr(dateStrToDate(dateStr))))
print(timestampToDate(stamps), type(timestampToDate(stamps)))
print(dateToTimestamp(dateStrToDate(dateStr)), type(dateToTimestamp(dateStrToDate(dateStr))))
效率分析
dateStr轉時間戳
def dateStrToTimestamp(str_, frmt='%Y-%m-%d %H:%M:%S'):
# return time.mktime(datetime.strptime(str_, frmt).timetuple())
return time.mktime(time.strptime(str_, frmt))
# test
%timeit time.mktime(datetime.strptime("2014:06:28 11:53:21", "%Y:%m:%d %H:%M:%S").timetuple())
%timeit time.mktime(time.strptime("2014:06:28 11:53:21", "%Y:%m:%d %H:%M:%S"))
時間戳轉dateStr
def timestampToDateStr(stamps, frmt='%Y-%m-%d %H:%M:%S'):
# return datetime.fromtimestamp(stamps).strftime(frmt)
return time.strftime(frmt, time.localtime(stamps))
# test
%timeit datetime.fromtimestamp(1527912732.0).strftime('%Y-%m-%d %H:%M:%S')
%timeit time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(1527912732.0))