[Python] *args and **kwargs (differences between cpp argc argv)

[Python] *args and **kwargs (differences between cpp argc argv)

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*args

*args refers to those arguments without keywords. What's more, it means that the number of arguments is unknown. The arguments would be stored as a tuple.

**kwargs

**kwargs refers to those keywords arguments, which also means that the number of arguments is unknown. The keywords-arguments would be saved as a dictionary.

It depends on the input arguments when the function is called on.

argc

argument count=len(args)+1

char* args[] or char** args

It's easy to know char* refers to a string.

In this part, each element is stored as a string to store the arguments, the file name is the first argument

#include <iostream>

int main(int argc, char** argv) {
    std::cout << "Have " << argc << " arguments:" << std::endl;
    for (int i = 0; i < argc; ++i) {
        std::cout << argv[i] << std::endl;
    }
}

Running it with ./test a1 b2 c3 will output

Have 4 arguments:
./test
a1
b2
c3