Can I iterate over a class in Python?

Question

I have a class that keeps track of its instances in a class variable, something like this:

class Foo:
    by_id = {}

    def __init__(self, id):
        sel         


        

Answer 1

You can create a class list and then call append in the init method as follows:

class Planet:
  planets_list = []

  def __init__(self, name):
     self.name = name
     self.planets_list.append(self)

Usage:

p1 = Planet("earth")
p2 = Planet("uranus")

for i in Planet.planets_list:
    print(i.name)