issue_comments: 1264014472

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https://github.com/pydata/xarray/issues/7111#issuecomment-1264014472 https://api.github.com/repos/pydata/xarray/issues/7111 1264014472 IC_kwDOAMm_X85LV1SI 32801740 2022-09-30T20:52:28Z 2022-09-30T20:54:25Z CONTRIBUTOR

Is there some feature that python uses to check whether a data structure is recursive when it's copying, which we're not taking advantage of? I can look more later.

yes, def __deepcopy__(self, memo=None) has the memo argument exactly for the purpose of dealing with recursion, see https://docs.python.org/3/library/copy.html. Currently, xarray's __deepcopy__ methods do not pass on the memo argument when deepcopying its components.

 
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