How to Solve Python\'s UnboundLocalError: Global vs. Local Variables?

UnboundLocalError in Python: Resolving Variable Scope Issues

The error message "UnboundLocalError: local variable 'Var1' referenced before assignment" indicates that a local variable within a function is accessed before it is assigned a value. In the provided code, the "Var1" variable is not defined within the scope of the "function()", but it is used in the conditional statements and assignment statement inside the function.

To resolve this issue, it is necessary to declare the "Var1" and "Var2" variables as global variables within the function. Global variables are defined at the module level and can be accessed from within functions. To declare these variables as global, add the following line to the top of the function:

global Var1, Var2

By declaring the variables as global, the Python interpreter will understand that they should be resolved from the module level scope instead of creating local copies within the function. This will allow the function to reference and modify the "Var1" and "Var2" variables as intended.

Note: Using global variables within functions should be avoided when possible, as it can lead to confusing and error-prone code. A better practice is to explicitly pass variables from the caller to the callee as parameters or return them as results.

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