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2025-09-23 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Development >
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This article mainly explains "what is the difference between the first one and two asterisks in the Python function". The content in the article is simple and clear, and it is easy to learn and understand. Please follow Xiaobian's train of thought to study and learn "what is the difference between the first one and two asterisks in the Python function".
It is common to see one or two asterisks preceded by input parameters in Python functions, for example:
Def foo (param1, * param2): def bar (param1, * * param2):
Both of these uses are actually used to import any number of parameters into the Python function.
Single star (*): * agrs
Import all parameters as tuples (tuple):
Example
Def foo (param1, * param2): print (param1) print (param2) foo
The output of the above code is:
1 (2, 3, 4, 5)
Double star (* *): * * kwargs
Double asterisks (*) import parameters in the form of dictionaries:
Example
Def bar (param1, * * param2): print (param1) print (param2) bar
The output of the above code is:
1 {'await: 2,' baked: 3}
In addition, another use of a single asterisk is to extract the parameter list:
Example
Def foo (runoob_1, runoob_2): print (runoob_1, runoob_2) l = [1,2] foo (* l)
The output of the above code is:
1 2
Of course, these two uses can appear in the same function at the same time:
Example
Def foo (a, baked 10, * args, * * kwargs): print (a) print (b) print (args) print (kwargs) foo (1, 2, 3, 4, eBay 5, fudge 6, Gmail 7)
The output of the above code is:
12 (3,4) {'eyed: 5,' faded: 6, 'gathers: 7} Thank you for reading, the above is the content of "what is the difference between the first one and two asterisks in the Python function?" after the study of this article, I believe you have a deeper understanding of the difference between the first one and two asterisks in the Python function, and the specific use needs to be verified by practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!
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