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bpo-29506: Clarify deep copy note in copy module

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The reference to administrative data was confusing to readers,
so this simplifies the note to explain that deep copying may copy
more then you intended, such as data that you expected to be
shared between copies.
(cherry picked from commit 19e0494256)
This commit is contained in:
Nick Coghlan 2017-04-09 20:57:04 +10:00 • committed by GitHub
parent 4c116cb3b3
commit a524d63072
2 changed files with 3 additions and 2 deletions
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4
Doc/library/copy.rst
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@ -47,8 +47,8 @@ copy operations:
* Recursive objects (compound objects that, directly or indirectly, contain a * Recursive objects (compound objects that, directly or indirectly, contain a
reference to themselves) may cause a recursive loop. reference to themselves) may cause a recursive loop.
* Because deep copy copies *everything* it may copy too much, e.g., * Because deep copy copies everything it may copy too much, such as data
even administrative data structures that should be shared even between copies. which is intended to be shared between copies.
The :func:`deepcopy` function avoids these problems by: The :func:`deepcopy` function avoids these problems by:

1
Misc/ACKS
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@ -770,6 +770,7 @@ Lawrence Kesteloot
Vivek Khera Vivek Khera
Dhiru Kholia Dhiru Kholia
Akshit Khurana Akshit Khurana
Sanyam Khurana
Mads Kiilerich Mads Kiilerich
Jason Killen Jason Killen
Jan Kim Jan Kim