Can a function be used as an argument for another function?

Yes, in Python functions are first-class objects, so they can be passed as arguments to other functions.

Example:

def greet(name):
    return f"Hello, {name}!"

def call_function(func, arg):
    return func(arg)

result = call_function(greet, "Alice")
print(result)  # Outputs: Hello, Alice!

In this example, the greet function is passed as an argument to the call_function and called inside it.