python - How to refer to the class from within it (like a recursive function)

Question

For a recursive function we can do:

def f(i):
  if i<0: return
  print i
  f(i-1)

f(10)

However is there a way to do the following thing?

class A:
  # do something
  some_func(A)
  # ...

question from:https://stackoverflow.com/questions/2035423/how-to-refer-to-the-class-from-within-it-like-a-recursive-function

Answer 1

If I understand your question correctly, you should be able to reference class A within class A by putting the type annotation in quotes. This is called forward reference.

class A:
  # do something
  def some_func(self, a: 'A')
  # ...

See ref below

1. https://github.com/python/mypy/issues/3661
2. https://www.youtube.com/watch?v=AJsrxBkV3kc