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This article mainly introduces "how to use python partial function partial". In daily operation, I believe many people have doubts about how to use python partial function partial. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the doubts about "how to use python partial function partial". Next, please follow the editor to study!

Catalogue

1. What is the partial function partial

2. The function of partial function

3. The syntax of partial function

4. Case

Case 1

Case 2

1. What is the partial function partial

A function with fixed attributes is provided in python.

2. The function of partial function

Fix some parameters of a function (that is, set the default value) and return a new function

3. The syntax of partial function

To use partial functions, you must first import from functools import partial

Function format: partial (func, * args, * * kwargs)

Func: stands for function name

* variable length parameters of args:func function

* * keyword parameters of the kwargs:func function

4. Case case 1from functools import partialbin2dec = partial (int, base=2) # sets the conversion of int to binary, where base is the argument represented by the int function. Print (bin2dec ('0b10001') # 17print (bin2dec (' 10001')) # 17hex2dec = partial (int, base=16) # set the conversion of int to hexadecimal print (hex2dec ('0x67')) # 103print (hex2dec (' 67')) # 103 case 2partial_max = partial (max, 100) print (partial_max (1,2,99)) # 100

Above, we set a default parameter 100 for the max () function and return a new function. When we pass in the parameter (1, 2, 99), there is actually a default value of 100 in the parameter, which is equivalent to (100,1,2,99), so the maximum value is 100.

These applications of partial functions seem simple, but they are of great use. They can well implement the DRY principle and save programming costs.

At this point, the study on "how to use the python partial function partial" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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