root/lib/lists.py @ 4067
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# Lists
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def is_seq(value): |
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return (isinstance(value, list) or isinstance(value, tuple) |
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or isinstance(value, set)) |
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def mk_seq(value): |
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if not is_seq(value): value = [value] |
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return value |
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def clear(list_): |
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while True: |
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try: list_.pop() |
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except IndexError: break |
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def uniqify(list_): |
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'''Removes duplicates from an iterable. Preserves order.'''
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existing = set() |
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new_list = [] |
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for value in list_: |
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if value not in existing: |
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existing.add(value) |
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new_list.append(value) |
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return new_list |