How to Retrieve Parameters of a Function in Python?

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To retrieve the parameters of a function in Python, you can make use of the built-in inspect module. The inspect module provides several functions for getting information about live objects, including functions. Here’s an example of how you can retrieve the parameters of a function:

import inspect

def example_function(param1, param2, *args, **kwargs):
    # Function body
    pass

# Get the function signature
signature = inspect.signature(example_function)

# Get the parameters from the signature
parameters = signature.parameters

# Iterate over the parameters and print their names
for param_name, param_obj in parameters.items():
    print("Parameter:", param_name)

In this example, we define a function called example_function() with three parameters: param1, param2, and variable-length arguments (*args and **kwargs).

We use the inspect.signature() function to retrieve the function’s signature, which includes the parameters and their order. The parameters attribute of the signature object returns an ordered dictionary of the function’s parameters, where the keys are the parameter names and the values are Parameter objects.

You can iterate over the parameters dictionary and access the parameter names (param_name) and Parameter objects (param_obj) to perform any desired processing or analysis. In the example, we simply print the parameter names.

The inspect module provides various other functions and attributes that can give you more detailed information about a function, such as default values, annotations, etc. You can explore the inspect module’s documentation for more advanced usage scenarios.

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