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                # 在函數中定義函數 # 在函數中定義函數 剛才那些就是函數的基本知識了。我們來讓你的知識更進一步。在Python中我們可以在一個函數中定義另一個函數: ~~~ def hi(name="yasoob"): print("now you are inside the hi() function") def greet(): return "now you are in the greet() function" def welcome(): return "now you are in the welcome() function" print(greet()) print(welcome()) print("now you are back in the hi() function") hi() #output:now you are inside the hi() function # now you are in the greet() function # now you are in the welcome() function # now you are back in the hi() function # 上面展示了無論何時你調用hi(), greet()和welcome()將會同時被調用。 # 然后greet()和welcome()函數在hi()函數之外是不能訪問的,比如: greet() #outputs: NameError: name 'greet' is not defined ~~~ 那現在我們知道了可以在函數中定義另外的函數。也就是說:我們可以創建嵌套的函數。現在你需要再多學一點,就是函數也能返回函數。
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