DJANGO - FileNotFoundError: [Errno 2] No such file or directory: '' when trying to acess a file

I'm accessing a function from a script that basically reads a JSON file and returns some value.

• main/randomgenerator/generatorran.py

def getName():
    with open('names.json','r') as names:
             ....

• The function works normally when executing it manually (python generatorran.py)

I'm currently importing that function and calling it when creating a model.

• main/models.py

from main.randomgenerator import generatorran


class myModel:
    ...
    model_name = models.CharField(max_length=100,default=generatorran.getName())

• When applying migrations it throws an error

  FileNotFoundError: [Errno 2] No such file or directory: '' when trying to acess a file

The same happens when I move the function inside of the models.py

Is there another way to read data from external files,am I missing something?