pdknsk

  >>> a = 100
  >>> b = 100
  >>> a is b
  True
  >>> a = 1000
  >>> b = 1000
  >>> a is b
  False

  >>> [*range(i) for i in range(5)]

  >>> [x for y in (range(i) for i in range(5)) for x in y]

  >>> filter(lambda x: x in 'ABC', 'ABCDEFA')
  'ABCA'

  >>> filter(lambda x: x[0] > x[1], ((1, 2), (4, 3)))
  >>> filter(lambda (x, y): x > y, ((1, 2), (4, 3))) # equivalent, error in 3

  >>>'Python'.encode('base64')
  'UHl0aG9u\n'