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l=['fita', 'Adenilton', 'armario', 'gaveta', 'Bruna', 'adentro', 'folga', 'impressora']
Z = filter(lambda x: x[0] != 'a' and x[0] != 'A', l)
#['fita', 'gaveta', 'Bruna', 'folga', 'impressora']


>>> range(0, 11)
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>> map(lambda x: x*x, range(0, 11))
[0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 100]
>>> map(lambda x: x*x, range(0, 11, 2))
[0, 4, 16, 36, 64, 100]
>>> map(lambda x: x*x, filter(lambda a: a%2==0, range(0, 11)))
[0, 4, 16, 36, 64, 100]
#equivalente a:
>>> K = filter(lambda a: a%2==0, range(0, 11))
>>> map(lambda x: x*x, K)
[0, 4, 16, 36, 64, 100]