Question

我必须编写一个脚本来读取文件并设置标记<p></p>和<w></w>。然后，如果文本的单词与stopwords.txt中的单词匹配，则必须添加属性type =“ stopword”。但是我在for循环中遇到了上述错误，而且我似乎无法理解问题所在以及如何解决。

import re
from pathlib import Path

STOPWORD_FILE_PATH = Path("stopwords.txt")

def main():
    while True:
        user_input = input("Enter input file name or 'exit': ")
        if user_input == "exit":
            break
        elif user_input:
            input_file_path = Path(user_input)
            if input_file_path.exists():
                convert_file(input_file_path)
            else:
                print("File %s doesn't exist." % user_input)

def convert_file(input_file_path):

    try:
        with input_file_path.open(mode="r", encoding="utf-8") as input_file:

            stopwords = import_stopwords()

            converted_string = ""

            for line in input_file:
                converted_line = convert_line(line, stopwords)
                if converted_line:
                    converted_string += converted_line

        export_to_file(converted_string)

    except IOError:
        print("Couldn't open file.")

def convert_line(line, stopwords):
    if len(line.strip()) == 0:
        global converted_line
        return converted_line
    else : 
        marked_words = re.sub(r'(\w+)', r'<w>\1<w>', line)
        marked_lines = print ('<p>'+ str(marked_words) + '<\p>')
        for word in stopwords : #ERROR Here
            if word == marked_lines:
                set_attribute = re.sub(r'<w>', r'<w type="stopword">', stopwords)
    return converted_line


       pass

def import_stopwords():
    try:
        with STOPWORD_FILE_PATH.open(mode="r") as input_file:
            content = input_file.read()
            print(content)
    except IOError:
        empty_list=list()
        print(empty_list)
        return

    pass

def export_to_file(converted_string):
    while True:
        user_input = input("Enter output file name or 'cancel': ")
        if user_input == "cancel":
            print("File export cancelled.")
            break
        elif user_input:

            try:
                output_file_path = Path(user_input)
                with output_file_path.open(
                        mode="w", encoding="utf-8",
                ) as output_file:
                    output_file.write(converted_string)
                print("File correctly exported.")
            except IOError:
                print("Couldn't save file %s." % user_input)


if __name__ == "__main__":
    main()

这是完整的错误消息：

Traceback (most recent call last):
  File "tp0312.py", line 120, in <module>
    main()
  File "tp0312.py", line 24, in main
    convert_file(input_file_path)
  File "tp0312.py", line 45, in convert_file
    converted_line = convert_line(line, stopwords)
  File "tp0312.py", line 69, in convert_line
    for word in stopwords :
TypeError: 'NoneType' object is not iterable

为什么“ TypeError：'NoneType'对象不可迭代”？

0 个答案: