import os
import sys
from pathlib import Path
from typing import List, Optional
def simple_function(x, y):
return x + y
def complex_function(data: List[int], threshold: int = 10) -> Optional[int]:
result = None
for item in data:
if item > threshold:
result = item
break
elif item == threshold:
result = item
return result
class Animal:
def __init__(self, name: str, sound: str):
self.name = name
self.sound = sound
self.listeners = []
def speak(self) -> str:
return f"{self.name} says {self.sound}"
def add_listener(self, listener):
self.listeners.append(listener)
def notify(self):
for listener in self.listeners:
listener(self)
class Dog(Animal):
def __init__(self, name: str):
super().__init__(name, "Woof")
def speak(self) -> str:
return f"{self.name} barks!"
def fetch(self, item: str) -> str:
return f"{self.name} fetches {item}"
class EmptyInterface:
def do_something(self):
...
def do_other(self):
pass
def long_chain_example(obj):
return obj.a.b.c.d.e
def delegating(service):
return service.handler.process()