如何从文件夹中读取并保存在 Python 中的另一个文件夹中

Question

此代码有效，但我必须一个一个地调用所有文件，我只需要调用文件所在的文件夹并将结果保存在另一个文件夹中。我不知道 :( 谁能帮助我，我是 Python 的新人。谢谢你，我很感激 :)

import re
import string
import sys

frequency = {}
sys.stdin = open('C:/Users/Desktop/app/data/sources/books/test.txt', 'r')
sys.stdout =open('C:/Users/Desktop/app/data/fre/news/test.txt', 'w')

text_string = sys.stdin.read()

match_pattern = re.findall(r'([-][\w]+)', text_string)

for word in match_pattern:
    count = frequency.get(word,0)
    frequency[word] = count + 1

frequency_list = frequency.keys()

for word in frequency_list:
    print (word, frequency[word])

Answer 1

也许是这样的？


import glob
import os

books = glob.glob("C:/Users/Desktop/app/data/sources/books/*.txt")

# now you have a list of all .txt files in that directory.

def writer(text_string, output_file):

    """A function to write out items from an input text string"""

    frequency = {}

    match_pattern = re.findall(r'([-][\w]+)', text_string)

    for word in match_pattern:
        count = frequency.get(word,0)
        frequency[word] = count + 1

    frequency_list = frequency.keys()

    for word in frequency_list:
        print(word, frequency[word], file=open(output_file, "a"))

# now you have a function that essentially does the procedure you already know works

for book in books:

    book_name = os.path.split(book)[-1]  # get <filename>.txt from the path

    # context manager will close the stream when you're done
    with open(book, "r") as file:  
        
        text_string = file.read()

        output_file = "C:/Users/Desktop/app/data/fre/news/" + book_name

        writer(text_string, output_file)

此代码将遍历您正在读取的目录中的 .txt 个文件。

我将您的工作代码封装在一个函数中（为清楚起见，重新格式化了一些格式，您可以直接从 print 函数指定要打印到的位置），因此当您遍历文件时，您可以读取它们并通过工作代码删除它们。

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