Detailed Explanation of python on Multivalued Parameters

Description

1. The number of parameters that need 1 function to handle is uncertain, so multivalued parameters can be used.

2. python has two multivalued parameters, and adding 1 * before the parameter name can receive tuples. Adding two * before the parameter name can receive the dictionary.

Instances

def demo(num, *args, **kwargs):
 
    print(num)
    print(args)
    print(kwargs)
 
 
demo(1, 2, 3, 4, 5, name=" Xiao Ming ", age=18, gender=True)

Expansion of knowledge points:

Multivalued parameter

Defining a function that supports multiple parameters may sometimes require that the number of parameters that a function can handle is uncertain. At this time, multi-valued parameters can be used.
There are two kinds of multivalued parameters in python: one can be received tuple is added before the parameter name; Add two acceptable dictionaries before the parameter name; 1 When naming multivalued parameters. Usually use the following two names:

args: Stores tuple parameters; There is one in front; * kwargs holds dictionary parameters, with two in front;

Args is the abbreviation of variable arguments, which has the meaning of variable; Kw is required by keywad, and kwargs can remember key-value pair parameters;

  def demo(num,*args,**kwargs):
    print(num)
    print(args)
    print(kwargs)


demo(1,2,3,4,5,name=" Xiao Ming ",gender = " Male ")

Running result

1 (2, 3, 4, 5) {'name': 'Xiaoming', 'gender': 'Male'}

Multivalued Parameter Case-Calculating the Sum Requirements of Any Multiple Numbers:

1. Define a function sum_numbers that can accept any number of integers

2. Functional requirements: Accumulate all the numbers passed and return the accumulated results.

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