Python:当我的模块返回“省略号”时,它意味着什么?

时间:2013-07-05 18:28:53

标签: python debugging ellipsis

好的,我在这里有这段代码:

def andSearch(inverseIndex, query):
    pepp = set()

    for y in [inverseIndex[x] for x in query]:
        if pepp == set():
            pepp.update(y)
        else:
            pepp & y 

    return pepp

我正在尝试输入一个字典,例如:

L =  {'Cats':{1},'Dogs':{2},'Cat':{0,4},'Dog':{0,4},'Pigs':{3},'Animal':{4}}

作为输出,我希望有一个显示字典值的集合,如果值连接并包含所有输入查询,如下所示:

query =  [ 'Dog', 'Cat','Animal']     ---->    {4}
query =  [ 'Dog', 'Cat']      --->  {0,4}
query = ['Dog', 'Dogs']   ----  {}      (or set())
query = []  ----->  {}

但问题是当我尝试运行模块时,我得到了这个奇怪的输出:

>>> andSearch(L,Query)
Ellipsis

可能导致什么?无论输入是什么,它都是一样的,它不会给我一个错误或什么都没有,你们这些聪明的家伙和女孩能帮助我吗?

1 个答案:

答案 0 :(得分:1)

我无法使用以下略微更新和优化的代码在Python 2或3中重现您的问题:

def andSearch(inverseIndex, query):
    pepp = set()

    for y in (inverseIndex[x] for x in query):
        if not pepp:
            pepp.update(y)
        else:
            pepp &= y

    return pepp

L =  {'Cats':{1}, 'Dogs':{2}, 'Cat':{0,4}, 'Dog':{0,4}, 'Pigs':{3}, 'Animal':{4}}

for query in [['Dog', 'Cat', 'Animal'],
              ['Dog', 'Cat'],
              ['Dog', 'Dogs'],
              [],]:

    print('query = {} ----> {}'.format(query, andSearch(L, query)))

使用Python 2.7.5输出:

query = ['Dog', 'Cat', 'Animal'] ----> set([4])
query = ['Dog', 'Cat'] ----> set([0, 4])
query = ['Dog', 'Dogs'] ----> set([])
query = [] ----> set([])

使用Python 3.3.2输出:

query = ['Dog', 'Cat', 'Animal'] ----> {4}
query = ['Dog', 'Cat'] ----> {0, 4}
query = ['Dog', 'Dogs'] ----> set()
query = [] ----> set()

...所以我只能假设你的系统出现了错误配置或搞砸的事情 (我没有安装'numpy'或scipy,顺便说一下。)