How to Access Class Properties from Strings in Python?

Accessing Class Properties from Strings in Python

Accessing class properties from strings can be a useful technique in various programming scenarios. Consider the following class definition:

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

    def doSomething(self, source):
        # Access class property based on string value</code>

Solution:

To access a class property dynamically based on a string value, you can use the getattr() function. Here's how:

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

In this example, self represents the instance of the User class, and source is a string that holds the name of the property you want to access. For instance, if source is 'other_data', the code will retrieve the self.other_data property.

Implementation:

Within the doSomething() method, you can implement the property access as follows:

<code class="python">def doSomething(self, source):
    if hasattr(self, source):
        x = getattr(self, source)</code>

This checks if the source property exists in the class before accessing it.

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