模塊是指將相關(guān)的功能和數(shù)據(jù)封裝在一起的一個(gè)單元。在編程中，模塊可以用來(lái)組織代碼，提高代碼的可讀性和可維護(hù)性。一個(gè)模塊可以包含函數(shù)、類、變量、常量等。 使用模塊的好處： 1. 提高代碼的復(fù)用性：可以將一些常用的功能封裝在模塊中，需要時(shí)直接引用即可。 2. 提高代碼的可維護(hù)性：將相關(guān)的功能和數(shù)據(jù)歸類到不同的模塊中，便于管理和維護(hù)。 3. 提高代碼的可讀性：通過(guò)模塊化的設(shè)計(jì)，代碼結(jié)構(gòu)更加清晰，易于理解和閱讀。 在Python中，一個(gè)模塊可以是一個(gè).py文件，文件名即為模塊名。可以使用import關(guān)鍵字來(lái)引入一個(gè)模塊，然后就可以使用該模塊中定義的函數(shù)、類、變量等。 例如，有一個(gè)名為math的模塊，可以使用以下方式引入并使用該模塊中的函數(shù)： ``` import math result = math.sqrt(16) print(result) # 輸出4.0 ``` 除了使用import關(guān)鍵字引入整個(gè)模塊之外，還可以使用from...import...語(yǔ)句來(lái)引入模塊中的具體函數(shù)、類、變量等。 例如，只需要使用math模塊中的sqrt函數(shù)，可以使用以下方式引入并使用： ``` from math import sqrt result = sqrt(16) print(result) # 輸出4.0 ``` 使用模塊可以提高代碼的效率和可維護(hù)性，是編程中常用的技術(shù)之一。
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