Python 入門之 內(nèi)置模塊 -- datetime模塊

1、datetime模塊

          
            from datetime import datetime
          
        

（1）datetime.now() 獲取當前時間和日期

          
            print(datetime.now())  # 獲取當前時間
          
        

（2）獲取指定時間和日期

          
            dt = datetime(2018,5,20,13,14)
print(dt)
          
        

（3）指定時間

          
            current_time = datetime.datetime.now()
print(current_time.replace(year=1977))  # 直接調(diào)整到1977年
print(current_time.replace(month=1))  # 直接調(diào)整到1月份
print(current_time.replace(year=1989,month=4,day=25))  # 1989-04-25 18:49:05.898601
          
        

（4）求時間差

          
            print(datetime(2018,10,1,10,11,12) - datetime(2011,11,1,20,10,10))
          
        

（5）datetime.timestamp() 將對象轉(zhuǎn)換成時間戳

          
            d = datetime.now()
print(d.timestamp())
          
        

（6）datetime.fromtimestamp() 將時間戳轉(zhuǎn)換為對象

          
            import time
f_t = time.time()
print(datetime.fromtimestamp(f_t))
          
        

（7）datetime.strftime 將對象轉(zhuǎn)換成字符串

          
            d = datetime.now()
print(d.strftime("%Y-%m-%d %H:%M:%S"))
          
        

（8）datetime.strptime 將字符串轉(zhuǎn)換成對象

          
            s = "2018-12-31 10:11:12"
print(datetime.strptime(s,"%Y-%m-%d %H:%M:%S"))

          
        

（9）可以進行加減運算

          
            from datetime import datetime,timedelta
print(datetime.now() - timedelta(days=1))
print(datetime.now() - timedelta(hours=1))