How to Access Class Property Dynamically from a String in Python?

Access Class Property from String in Python

In object-oriented programming, it may be necessary to access class properties dynamically based on a string input. Consider the following example class:

<code class="python">class User:
    def __init__(self):
        self.data = []
        self.other_data = []

    def doSomething(self, source):
        if source == 'other_data':
            # How to access self.other_data here?</code>

This example aims to access the class member with the name specified in the source string. Here's how it can be achieved:

Using getattr():

The getattr() function allows accessing attributes of an object dynamically. It takes two arguments: the object and a string representing the attribute name. In this case, source is the attribute name:

<code class="python">x = getattr(self, source)</code>

This line retrieves the value of the attribute with the name stored in source. In the example above, it would assign self.other_data to x.

Note: getattr() can work with both data attributes and methods.

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