Python time datetime常用時間處理方法

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常用時間轉換及處理函數：

import datetime# 擷取目前時間d1 = datetime.datetime.now()print d1# 目前時間加上半小時d2 = d1 + datetime.timedelta(hours=0.5)print d2# 格式化字串輸出d3 = d2.strftime(‘%Y-%m-%d %H:%M:%S‘)print d3# 將字串轉化為時間類型d4 = datetime.datetime.strptime(date,‘%Y-%m-%d %H:%M:%S.%f‘)print d4

 

擷取本周和本月第一天的日期：

# -*- coding:utf-8 -*-import datetimedef first_day_of_month():    ‘‘‘    擷取本月第一天    :return:    ‘‘‘    # now_date = datetime.datetime.now()    # return (now_date + datetime.timedelta(days=-now_date.day + 1)).replace(hour=0, minute=0, second=0,    # microsecond=0)    return datetime.date.today() - datetime.timedelta(days=datetime.datetime.now().day - 1)def first_day_of_week():    ‘‘‘    擷取本周第一天    :return:    ‘‘‘    return datetime.date.today() - datetime.timedelta(days=datetime.date.today().weekday())if __name__ == "__main__":    this_week = first_day_of_week()    last_week = this_week - datetime.timedelta(days=7)    this_month = first_day_of_month()    last_month = this_month - datetime.timedelta(days=(this_month - datetime.timedelta(days=1)).day)    print this_week    print last_week    print this_month    print last_month

 

Python time datetime常用時間處理方法