Web Reference: Jul 11, 2025 · The global keyword in Python allows a function to modify variables that are defined outside its scope, making them accessible globally. Without it, variables inside a function are treated as local by default. Definition and Usage The global keyword is used to create global variables from a no-global scope, e.g. inside a function. Jul 11, 2016 · If you want to refer to a global variable in a function, you can use the global keyword to declare which variables are global. You don't have to use it in all cases (as someone here incorrectly claims) - if the name referenced in an expression cannot be found in local scope or scopes in the functions in which this function is defined, it is ...
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