Question

Two Powershells showing running the scan function and running nosetests

在更新的学习python 3中，我很难让ex48代码工作。在本练习中，我们给出了测试脚本（我将6个案例缩减为1，因为它们都返回了相同的错误）并告诉他们编写一个lexicon.py文件，使得测试（通过nosetests）不会返回任何错误：

from nose.tools import *
from ex48 import lexicon


def test_directions():
    assert_equal(lexicon.scan("north"), [('direction', 'north')])
    result = lexicon.scan("north south east")
    assert_equal(result, [('direction', 'north'),
                          ('direction', 'south'),
                          ('direction', 'east')])

我的代码lexicon.py脚本如下：

directions = ('north', 'south', 'east')
verbs = ('go', 'kill', 'eat')
stops = ('the', 'in', 'of')
nouns = ('bear', 'princess')

def get_tuple(word):
    lowercased = word.lower()

    if lowercased in directions:
        return('direction', lowercased)
    elif lowercased in verbs:
        return('verb', lowercased)
    elif lowercased in stops:
        return('stop', lowercased)
    elif lowercased in nouns:
        return('noun', lowercased)
    elif lowercased.isdigit():
        return('number', int(lowercased))
    else:
        return('error', word)

def scan(sentence):
    pairs = []
    text = str(sentence)
    words = text.split()

    for item in words:
        try:
            tup = get_tuple(item)
            pairs.append(tup)
        except:
            pass
    print(pairs)

这是我的错误代码：

File , line 6, in test_directions
    assert_equal(lexicon.scan("north"), [('direction', 'north')])
AssertionError: None != [('direction', 'north')]
-------------------- >> begin captured stdout << ---------------------
[('direction', 'north')]

当我直接在powershell中运行python中的程序时，扫描函数似乎总是得到正确的输出。如果我输入任何字符串，如“北方记得”，我会得到以下输出：

[('stop', 'the'), ('direction', 'north'), ('error', 'remembers)]

有人能看出为什么nosetests会抛出这个错误吗？

编辑 - 删除'return'命令时出现问题，但基础错误不是返回打印。 Nosetests仍然具有与以下代码相同的错误：

我现在修改了代码，如下所示：

def scan(sentence):
    pairs = []
    text = str(sentence)
    words = text.split()

    for item in words:
        tup = get_tuple(item)
        pairs.append(tup)
    return pairs

学习Python艰难的方式ex48 nosetests

0 个答案: