CODEWITHSUNDEEP
pythonpython-typingattributeerror
Sohil
Sohil

Reputation: 562

Python AttributeError: module has no attribute

I have a python module file which has a bunch of class definition along with its method.

# sample.py
def abc():
    ...

class Sampler(object):
    def foo(self):
       ...

class Sampler2(object):
     def bar(self):
         ...

Now I want to import this file into another python file and use type annotations while defining a function like below:

# samplers.py

import sample

class Xyz(object):
    def foobar(self, sample: sample.Sampler)-> int :
        ...

The above is throwing AttributeError: module 'sample' has no attribute 'Sampler'. Is the above implementation incorrect ?

Upvotes: 1

Views: 3807

Answers (1)

J_H
J_H

Reputation: 20425

  def foobar(self, sample:sample.Sampler)-> int :

AttributeError: module 'sample' has no attribute 'Sampler'.

The formal parameter is named sample, yet you imported sample. Rename the formal parameter (perhaps to sample_), or use this syntax:

from sample import Sampler
...
    def foobar(self, sample: Sampler) -> int:

Cf https://www.python.org/dev/peps/pep-0484/#forward-references, which explains that the use of string literals is also supported. Here, using symbols would be the most appropriate approach.

Upvotes: 1

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