How to check if an object has an attribute in Python?
To check if an object has an attribute in Python, you can use the
hasattr function. This function takes two arguments: the object and the attribute name as a string. It returns
True if the object has the attribute, and
False if it does not.
class MyClass: def __init__(self): self.attribute = 'attribute' obj = MyClass() hasattr(obj, 'attribute') # returns True hasattr(obj, 'other_attribute') # returns False
You can also use the
getattr function to check if an object has an attribute, but
hasattr is generally more convenient.
class MyClass: def __init__(self): self.attribute = 'attribute' obj = MyClass() getattr(obj, 'attribute', None) # returns 'attribute' getattr(obj, 'other_attribute', None) # returns None
getattr will only work for attributes that are defined on the object itself, or on its class or any of its superclasses. They will not work for attributes that are stored in the object's
__dict__ attribute, unless the attribute is defined in the class's
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