[Biopython-dev] [Biopython - Bug #3349] (New) Bio.PDB.Entity.copy child handling errors.

[redmine at redmine.open-bio.org]

Issue #3349 has been reported by Alexander Ford.

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Bug #3349: Bio.PDB.Entity.copy child handling errors.
https://redmine.open-bio.org/issues/3349

Author: Alexander Ford
Status: New
Priority: Normal
Assignee: 
Category: 
Target version: 
URL: https://github.com/asford/biopython/tree/entity_copy_fix


The Bio.PDB.Entity.copy function, introduced in revision 0d8299a9, does not properly handle the entity child list. Iteration over the child_dict results in a loss of child ordering and the explicit call to detach_child results in a destructive modification of the copied entity's child elements' parent reference.

The copy function should instead instantiate empty child_list and child_dict elements in the copy object and then add copies of each element in the source object's child_list via the Entity.add function. This will appropriately update the copy's child_dict and the child's parent reference while preserving child ordering.


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