How to Pass Functions with Arguments as Parameters in Python?

Passing Functions with Arguments to Other Functions in Python

For enhanced flexibility and code reusability, Python offers the capability to pass functions with arguments as a parameter to other functions. This technique expands the functionality of a function by incorporating the behavior of another function.

Consider the following scenario where you want to create a function named 'perform' that operates on different function calls. However, these function calls, such as 'action1()', 'action2(p)', and 'action3(p,r)', have their own arguments.

To accomplish this, you can utilize the Python syntax for passing functions with arguments:

<code class="python">def perform(fun, *args):
    fun(*args)</code>

In this code, the 'perform' function expects two parameters: 'fun' (the function to be called) and '*args' (the variable-length argument list). This structure allows 'perform' to accept any number of arguments passed to the 'fun' function when it's called.

Here's an example of how you can use the 'perform' function:

<code class="python">def action1(args):
    # Perform some action

def action2(args):
    # Perform a different action

perform(action1)
perform(action2, p)
perform(action3, p, r)</code>

In this example, the 'perform' function is called with different functions ('action1', 'action2', and 'action3') and corresponding arguments. The 'fun' parameter refers to the function being called, while the '*args' parameter contains the arguments passed to that function.

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