How to Access Class Property Dynamically Using String in Python?

Accessing Class Property from String in Python

When working with Python, you may encounter situations where you need to access a class property dynamically based on a string. One such use case is accessing different class members based on a user-provided string value.

In such scenarios, you can utilize the getattr function. Consider the following class as an example:

<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</code>

Within the doSomething method, you can access the class property dynamically using getattr:

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

In this case, x will be assigned the value of the class property other_data if source equals 'other_data'. This is because getattr takes an object and a string that represents the property name, and returns the value of the property.

Using getattr provides a convenient and dynamic way to access class properties based on a string. It allows you to avoid using hardcoded property names, making your code more flexible and reusable.

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