chobits

>>> class A():
...     val = 0
...
>>> a = A()
>>> a.val, a = 1, a.val                 # right
>>> a = A()
>>> a, a.val = a.val, 1                 # wrong
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'int' object has no attribute 'val'

chobits

>>> def test(a, b):
...  print a, b
... 
>>> test('hello', 'world')
hello world
>>> test(*('hello', 'world'))                     # tuple
hello world
>>> test(*iter(['hello', 'world']))               # iter
hello world
>>> test(*['hello', 'world'])                     # list

chobits

numbers:
:%s/[0-9]\+/<something>/gc

strings:
:%s/[a-zA-Z]\+/<something>/gc

parentheses:
:%s/[\[\]{}()<>]\+/<something>/gc

special characters: