python調用帶參函數

There are following types of function calls in python:

python中有以下類型的函數調用：

Call by value

按價值致電

Call by reference

通過參考電話

1)按價值致電 (1) Call by value )

When, we call a function with the values i.e. pass the variables (not their references), the values of the passing arguments cannot be changes inside the function.

當我們調用帶有值的函數時，即傳遞變量(而不是它們的引用)時，傳遞的參數的值不能在函數內部更改。

# call by value def change(data):data=45print("Inside Function :",data)def main():data=20print("Before Calling :",data)change(data)print("After Calling :", data)if __name__=="__main__":main()

Output

輸出量

Before Calling : 20 Inside Function : 45 After Calling : 20

2)致電查詢 (2) Call by reference)

When, we call a function with the reference/object, the values of the passing arguments can be changes inside the function.

當我們調用帶有引用/對象的函數時，可以在函數內部更改傳遞參數的值。

Example 1: Calling function by passing the object to the class

示例1：通過將對象傳遞給類來調用函數

class mydata:def __init__(self):self.__data=0def setdata(self,value):self.__data=valuedef getdata(self):return self.__datadef change(data):data.setdata(45)print("Inside Function :",data.getdata())def main():data=mydata()data.setdata(20)print("Before Calling :",data.getdata())change(data)print("After Calling :", data.getdata())if __name__=="__main__":main()

Output

輸出量

Before Calling : 20 Inside Function : 45 After Calling : 45

Example 2: Calling function by passing the reference to the list

示例2：通過將引用傳遞給列表來調用函數

def change(data):data[1]=25print("Inside Function :",data)def main():data=[10,20,30,40,50]print("Before Calling :",data)change(data)print("After Calling :", data)if __name__=="__main__":main()

Output

輸出量

Before Calling : [10, 20, 30, 40, 50] Inside Function : [10, 25, 30, 40, 50] After Calling : [10, 25, 30, 40, 50]

翻譯自: https://www.includehelp.com/python/types-of-function-calling-with-examples.aspx

python調用帶參函數

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