如何用Python结合libSBML移除SBML文件中Group的ListOfMembers成员

尝试删除SBML文件中的部分物种，并将这些物种ID存入removed_species集合后，运行以下代码移除Group内对应的成员：

plugin = model.getPlugin("groups")
if plugin is not None:
    for group in plugin.getListOfGroups():
        num = group.getNumMembers()
        for member in group.getListOfMembers():
            if member.getIdRef() in removed_species:
                print("Member removed from group", group.getId(), member.getIdRef())
                group.removeMember(member.getIdRef())
        if group.getNumMembers() == num:
            print("No member removed from group", group.getId())

程序运行时，循环内重复输出“已移除成员”的提示，但最终Group的成员数量并未减少，输出如下：

Member removed from group Sos_471_0_ Sos_dot_Ras_GEF_cplx_486_0_
Member removed from group Sos_471_0_ Sos_dot_Ras_GEF_cplx_486_0_
No member removed from group Sos_471_0_
No member removed from group Ras_548_0_
Member removed from group EGFR_560_0_ phosph_Shc_cplx_575_0_
Member removed from group EGFR_560_0_ phosph_Shc_cplx_575_0_
No member removed from group EGFR_560_0_

问题根源是在遍历getListOfMembers()返回的集合时直接修改原集合，迭代器会因为集合元素的删除出现异常，导致删除操作没有实际生效，甚至重复处理同一个元素。

解决方法是先将成员集合转换为一个独立的列表副本，再遍历这个副本进行删除操作：

plugin = model.getPlugin("groups")
if plugin is not None:
    for group in plugin.getListOfGroups():
        num = group.getNumMembers()
        # 转换为列表副本，避免遍历原集合时修改导致的问题
        for member in list(group.getListOfMembers()):
            member_id = member.getIdRef()
            if member_id in removed_species:
                print("Member removed from group", group.getId(), member_id)
                group.removeMember(member_id)
        if group.getNumMembers() == num:
            print("No member removed from group", group.getId())

这样遍历的是原成员集合的快照，删除操作不会影响迭代过程，能确保符合条件的成员被正确移除。

内容的提问来源于stack exchange，提问作者Clément Raspail