filter list compiled regular expression map function over list

def double( number )
   return 2 * number

number_list = [ 1, 4, -2 ]

# easier than list comprehension
new_double_list = map( double , number_list )

def odd(n)
  return n % 2

...

>>> li = [1, 2, 3, 5, 9, 10, 256, −3]

>>> filter(odd, li)

[1, 3, 5, 9, −3]

>>> [e for e in li if odd(e)]

>>> filteredList = []

>>> for n in li:

... if odd(n):

... filteredList.append(n)

...

>>> filteredList

[1, 3, 5, 9, −3]


 files = os.listdir(path)

 test = re.compile("test\.py$", re.IGNORECASE)

 files = filter(test.search, files)