print(add()) TypeError: add() missing 2 required positional arguments: 'x' and 'y' 1. 2. 3. 4. 5. 6. 这个就是缺少x,y参数导致的异常。 所有在使用函数及自定义时要注意必选参数的设置 可变参数 可变参数这个名字比较高大上,但是实际上很简单 比如要写一个多个数字相加的函数怎么办呢? 直接写?
# define function with 4 positional parameters def add(a, b, c , d): return a + b + c + d if __name__ == '__main__': # call function with 4 arguments result1 = add(4,5,3,2) print(" 1 Result: ", result1) # call function with 6 arguments result2 = add(...
fmt::print("Hello, {}!","world");// Python-like format string syntaxfmt::printf("Hello,%s!","world");// printf format string syntax Format a string and use positional arguments: std::string s = fmt::format("I'd rather be {1} than {0}.","right","happy");// s == "I'd...