错误：'builtin_function_or_method'对象不可迭代

Question

在其他一些教程中，以下python代码用于从json文件中查找适用于它们的单词。但是，不适合我。你能不能帮我摆脱这个错误。

import json
from difflib import get_close_matches

data = json.load(open("data.json"))

def translate(word):
    word = word.lower
    if word in data:
        return data[word]
    elif len(get_close_matches(word, data.keys())) > 0:
        yn=input ("did you mean %s instead? Enter Y if yes and N if no" % get_close_matches(word, data.keys())[0])
        if yn == "Y":
            return data[get_close_matches(word, data.keys())[0]]
        elif yn == "N":
            return("the word doesn't exist")
        else:
            print("we don't understand your entry")
    else:
        return("the word does't exist please crosscheck it")

word = input("enter a word: ")

output = translate(word)

if type(output) == list:
    for item in output:
        print(item)
else:
    print(output)

这是我得到的错误：

Traceback (most recent call last):
  File "pracjson.py", line 23, in <module>

    output = translate(word)
  File "pracjson.py", line 10, in translate
    elif len(get_close_matches(word, data.keys())) > 0:
  File "C:\Users\Vishnu's World\AppData\Local\Programs\Python\Python37\lib\difflib.py", line 723, in get_close_matches
    s.set_seq2(word)
  File "C:\Users\Vishnu's World\AppData\Local\Programs\Python\Python37\lib\difflib.py", line 279, in set_seq2
    self.__chain_b()
  File "C:\Users\Vishnu's World\AppData\Local\Programs\Python\Python37\lib\difflib.py", line 311, in __chain_b
    for i, elt in enumerate(b):
TypeError: 'builtin_function_or_method' object is not iterable

Answer 1

我不熟悉get_close_matches。但根据文档：https://docs.python.org/2/library/difflib.html，它似乎需要一个列表（可迭代对象）。

data.keys()返回一本字典。尝试先将其转换为列表。

    elif len(get_close_matches(word, list(data.keys()))) > 0:

Answer 2

你的错误在这一行：

word = word.lower

.lower是一种方法，所以它应该是：

word = word.lower()

https://docs.python.org/3/library/stdtypes.html?highlight=lower#str.lower