How to know if an object has an attribute in Python

Question

How can I know if an object has some attribute in Python, Is there a way to do it?

E.g.

    >>> q = SomeClass()
    >>> q.someProperty = value
    >>> q.property
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
    AttributeError: SomeClass instance has no attribute 'property'

 so, How can I know that q has the attribute property before using it in syntax?

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Answer 1

These is a very easy task to do, just try hasattr() :

if hasattr(q, 'property'):
    q.property

 This Is a very fast and elegant method and will solve your problem.

Happy Learning. 

Answer 2

You can use the getattr() function for knowing whether an object has attribute in Python or not:-

getattr(a, 'property', 'default value')

You can use the following video tutorials to clear all your doubts:-