我有一个对象ID的映射：
mapping = {'id-1':'id-10', 'id-2':'id-14', 'id-3':'id-19'}
还有两个包含对象的列表，id是对象的属性，例如object_id1.id = 'id-1'。
list1 = [object_id1, object_id3, object_id4, object_id5]
list2 = [object_id19, object_id11, object_id14, object_id10]
我想要一个列表，其中包含那些相关对象。如
output = [(object_id1, object_id10), (object_id2, object_id14),(object_id3, object_id19)]
是否可以在一个for循环中完成？
您不能在单个for循环中执行此操作，但是可以在两个（非嵌套）循环中执行此操作：
>>> mapping = {'id-1': 'id-10', 'id-2': 'id-14', 'id-3': 'id-19'}
>>> list1 = [object_id1, object_id3, object_id4, object_id5]
>>> list2 = [object_id19, object_id11, object_id14, object_id10]
构造一个查找字典，用于通过idin查找项目list2：
>>> lookup_dict = {item.id: item for item in list2}
那么您可以简单地执行以下操作：
>>> output = [(item, lookup_dict[mapping[item.id]]) for item in list1 if mapping[item.id] in lookup_dict]
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