How Can I Dynamically Call a Function in Python Using a String?

Calling a Function Dynamically Using a String

Calling a function using a string that contains the function's name can be useful in certain scenarios. Here's how you can achieve this:

Utilizing getattr()

The getattr() function allows you to retrieve attributes dynamically. To call a function using a string, you can use the following approach:

import foo
func_name = "bar"
bar = getattr(foo, func_name)
result = bar()

In this example, we import the foo module, and then we use func_name to retrieve the reference to the bar function using getattr(). Finally, we can call the function and store the result in result.

Understanding getattr()

getattr() takes two arguments:

• The first argument is the object instance the attribute is being retrieved from (here, the foo module).
• The second argument is the string name of the attribute you want to retrieve (here, "bar").

getattr() can be used to access not only functions but also class instance bound methods, module-level methods, and even class methods.

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