45 lines
1.1 KiB
Python
45 lines
1.1 KiB
Python
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#!/usr/bin/env python
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# encoding: utf-8
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from functools import wraps
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def no_repetition(equals=lambda x,y: x == y):
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""" Remove yield values which has already been yield
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:param fun: a generator
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:returns: same generator with no repetitions
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>>> norep = no_repetition()
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>>> def str_gene(string):
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... for i in string:
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... yield i
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>>> norep_str_gene = norep(str_gene)
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>>> [i for i in norep_str_gene("aaabraabbbere")]
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['a', 'b', 'r', 'a', 'b', 'e', 'r', 'e']
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"""
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def wrapper(fun):
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@wraps(fun)
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def dont_repeat(*args, **kwrds):
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gen = fun(*args, **kwrds)
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old_s = ""
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while True:
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try:
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new_s = next(gen)
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except StopIteration:
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break
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else:
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if not equals(new_s, old_s):
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old_s = new_s
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yield new_s
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return dont_repeat
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return wrapper
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# -----------------------------
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# Reglages pour 'vim'
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# vim:set autoindent expandtab tabstop=4 shiftwidth=4:
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# cursor: 16 del
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