How Can I Access and Modify Python Object Attributes Using String Names?

Accessing Object Attributes Using String Names

In Python, accessing attributes of an object is typically done using the dot operator. However, it may be necessary to access attributes using a string corresponding to the attribute name. This can be achieved using the built-in functions getattr and setattr.

To retrieve the value of an attribute given its string name, use getattr. For example:

class Test:
    def __init__(self):
        self.attr1 = 1
        self.attr2 = 2

t = Test()
x = "attr1"
x_value = getattr(t, x)

To set the value of an attribute using its string name, use setattr. For example:

setattr(t, 'attr1', 21)

Note that this technique can also be used to call methods from string names by accessing the method and then calling it normally.

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