>> d = {'a': 1, 'b': 2, 'c': 3} >>> with preserve_keys(d, 'b', 'c', 'd'): ... del d['a'] ... del d['b'] # will be reset to 2 ... d['c'] = None # will be reset to 3 ... d['d'] = 4 # will be deleted ... d['e'] = 5 ... print(sorted(d.items())) ... [('c', None), ('d', 4), ('e', 5)] >>> print(sorted(d.items())) [('b', 2), ('c', 3), ('e', 5)] cXlX lgN) dictionarykeys)selfrr s iC:\Users\julio\OneDrive\Documentos\Trabajo\Ideas Frescas\venv\Lib\site-packages\IPython/utils/contexts.py__init__preserve_keys.__init__$s $ c/n0nURnURH!nXC;aX4X$'MURU5 M# XlX lgr)rr append to_delete to_update)r rrdks r __enter__preserve_keys.__enter__(sK  OOAv t   #  #"rcURnURHnURUS5 M URUR5 gr)rrpopupdater)r exc_inforrs r __exit__preserve_keys.__exit__7s6 OOA EE!TN   r)rr rrN) __name__ __module__ __qualname____firstlineno____doc__r rr__static_attributes__rr rr s2 #!rr)r!warningsrr#rr r%s% 2!2!r