def greeting(name = 'Guest'):
  print(f'Hi {name}!')

greeting()
greeting('Kristine')

# Nope
def some_function(collection = []):
  collection.append(1)
  print(id(collection))
  return collection


print(some_function())
print(some_function())
print(some_function([1, 2, 3]))
print(some_function())
print(some_function())

print(id(some_function()))
print(id(some_function()))
print(id(some_function()))
print(id(some_function()))