56 lines
1.2 KiB
Python
56 lines
1.2 KiB
Python
"""collections_extended contains a few extra basic data structures."""
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from ._compat import Collection
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from .bags import bag, frozenbag
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from .setlists import setlist, frozensetlist
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from .bijection import bijection
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from .range_map import RangeMap, MappedRange
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__version__ = '1.0.2'
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__all__ = (
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'collection',
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'setlist',
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'frozensetlist',
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'bag',
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'frozenbag',
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'bijection',
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'RangeMap',
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'MappedRange',
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'Collection',
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)
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def collection(iterable=None, mutable=True, ordered=False, unique=False):
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"""Return a Collection with the specified properties.
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Args:
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iterable (Iterable): collection to instantiate new collection from.
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mutable (bool): Whether or not the new collection is mutable.
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ordered (bool): Whether or not the new collection is ordered.
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unique (bool): Whether or not the new collection contains only unique values.
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"""
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if iterable is None:
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iterable = tuple()
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if unique:
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if ordered:
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if mutable:
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return setlist(iterable)
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else:
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return frozensetlist(iterable)
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else:
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if mutable:
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return set(iterable)
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else:
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return frozenset(iterable)
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else:
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if ordered:
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if mutable:
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return list(iterable)
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else:
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return tuple(iterable)
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else:
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if mutable:
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return bag(iterable)
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else:
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return frozenbag(iterable)
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