Question

问题我有以下代码：

def _score_sentences(tf_idf_matrix) -> dict:
      sentenceValue = {}

    for sent, f_table in tf_idf_matrix.items():
        total_score_per_sentence = 0

        count_words_in_sentence = len(f_table)
        for word, score in f_table.items():
            total_score_per_sentence += score

        sentenceValue[sent] = round(total_score_per_sentence / count_words_in_sentence, 3)

    return sentenceValue

sentence_scores = _score_sentences(tf_idf_matrix)

基本上，应该创建一个字典，并为每个句子分配一个浮点数（取自tf_idf_matrix）。它打印出看起来像字典的内容，但是当我运行以下代码时：

top_scores = {}
for sent, score in sentence_scores.items():
    if f_table >= .4:
        top_scores[sent] = score

print(top_scores)

我收到此错误报告：

AttributeError                            Traceback (most recent call last)
<ipython-input-50-2220086aa6aa> in <module>
      1 top_scores = {}
      2 
----> 3 for sent, score in sentence_scores.items():
      4     if f_table >= .4:
      5         top_scores[sent] = score

AttributeError: 'str' object has no attribute 'items'

部分解决方案

我还看到了其他一些问题，建议尝试使用ast.literal_eval()。但是，当我尝试

import ast

d = ast.literal_eval(sentence_scores)
top_scores = {}

for sent, score in d.items():
    if f_table >= .4:
        top_scores[sent] = score
print(top_scores)

我收到此错误报告：

Traceback (most recent call last):

  File "c:\users\...\interactiveshell.py", line 3331, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)

  File "<ipython-input-51-3d124b40f0bb>", line 3, in <module>
    d = ast.literal_eval(sentence_scores)

  File "c:\users\...\lib\ast.py", line 59, in literal_eval
    node_or_string = parse(node_or_string, mode='eval')

  File "c:\users\...\lib\ast.py", line 47, in parse
    return compile(source, filename, mode, flags,

  File "<unknown>", line 1
    P's grandfather
                  ^
SyntaxError: EOL while scanning string literal

很抱歉，这个问题很长；我想尝试尽可能明确地解决问题，并尝试解决它。基本上，我想知道sentence_scores是否是字符串。如果是这样，我想知道为什么ast.literal_eval()无法正常工作。如果sentence_scores是一本字典，我想知道为什么要得到这个初始的AttributeError。

谢谢！

Answer 1

类型检查应清除此问题。我没有足够的上下文信息来确定您的代码是否被正确使用，但是在其中添加了更好的类型注释：

from typing import Dict

def _score_sentences(tf_idf_matrix: Dict[str, Dict[str, float]]) -> Dict[str, float]:
    sentence_value: Dict[str, float] = {}

    for sent, f_table in tf_idf_matrix.items():
        total_score_per_sentence = 0.0

        count_words_in_sentence = len(f_table)
        for word, score in f_table.items():
            total_score_per_sentence += score

        sentence_value[sent] = round(total_score_per_sentence / count_words_in_sentence, 3)

    return sentence_value

sentence_scores = _score_sentences(tf_idf_matrix)

然后运行mypy －会告诉您问题出在哪里。我的直觉是某些东西可能会覆盖代码中其他地方的sentence_scores。

Dict问题：AttributeError：'str'对象没有属性'items'

1 个答案: