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use some vars in current context and try rollback state when exit the context.


By default:

from use_context import use

ls = [1, 2, 3]
with use(ls):
assert ls == [1, 2, 3]

For use ref (by name):

a = 15
with use(refs=['a']) as ctx:
    assert not ctx.is_ref_changed('a')
    a = 16
    assert a == 16
    assert ctx.is_ref_changed('a')
assert a == 15


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Files for use-context, version 0.0.3
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