Elixir GenServer versus Python class

demo.exs

my_user = User.start_link("Tyler", "abcd-efgh-1234-5678")

# Prints "Hi, I'm Tyler"
User.say_hello(my_user)

# Prints a process ID
IO.inspect(my_user)

# Prints the state data:
# %{name: "Tyler", id: "abcd-efgh-1234-5678"}
IO.inspect(:sys.get_state(my_user))

# Hi, I'm Tyler Young
User.update_name(my_user, "Tyler Young")
User.say_hello(my_user)

demo.py

my_user = User("Tyler", "abcd-efgh-1234-5678")

# Prints "Hi, I'm Tyler"
my_user.say_hello()

# Prints a memory address:
# <__main__.User object at 0x103e4aeb0>
print(my_user)

# Prints the data:
# {'name': 'Tyler', 'id': 'abcd-efgh-1234-5678'}
print(my_user.__dict__)

# Hi, I'm Tyler Young
my_user.set_name("Tyler Young")
my_user.say_hello()

user.ex

defmodule User do
  use GenServer

  def start_link(user_name, user_id, opts \\ []) do
    server_name = Keyword.get(opts, :name, __MODULE__)
    GenServer.start_link(__MODULE__, %{name: user_name, id: user_id}, name: server_name)
  end

  def update_name(server, new_name), do: GenServer.call(server, {:set_name, new_name})

  def say_hello(server), do: GenServer.call(server, :say_hello)

  @impl GenServer
  def init(state), do: {:ok, state}

  @impl GenServer
  def handle_call({:set_name, new_name}, _from, state) do
    {:reply, new_name, %{state | name: new_name}}
  end

  @impl GenServer
  def handle_call(:say_hello, _from, %{name: name} = state) do
    IO.puts("Hi, I'm #{name}")
    {:reply, :ok, state}
  end
end

user.py

class User:
  def __init__(self, name, id):
    self.name = name
    self.id = id

  def say_hello(self):
    print(f"Hi, I'm {self.name}")

  def set_name(self, new_name):
    self.name = new_name