删除两个列表之间的交集 [英] Delete intersection between two lists

问题描述

我有两个对象列表：

m2m_links = mymodel._meta.many_to_many
o2m_links = mymodel._meta.get_all_related_objects()

o2m_links中有一个对象我想忽略/删除。可以通过以下方式进行标识：

There is an object in o2m_links that I wish to omit/delete. It can be identified in the following way:

for r in m2m_links:
    if not r.rel.through._meta.auto_created:
        # Delete o2m_links object that has the same name as r.rel.through._meta.object_name

如何删除符合此循环命中条件的o2m_links对象？

推荐答案

您可以使用集合和列表理解来过滤列表：

You can use a set and a list comprehension to filter the list:

names_to_remove = set([r.rel.through._meta.object_name for r in m2m_links if not r.rel.through._meta.auto_created])
filtered_list = [r for r in o2m_links if r.rel.through._meta.object_name in names_to_remove]

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