如何使用 Python 将文件夹中的 all.txt 文件和 append 其内容读取到 one.txt 文件中？

Question

I have a folder with multiple.txt files. for every.txt file in the folder, I want to take one line of the content and append them in a new.txt file. How to do this in Python? I'm new to this, also new to publicly asking questions. this is all I got.

import os    
Folder = os.listdir('E:\\Project\\tests')   
f = open('outputFile.txt', 'a')   

for file in Folder:   
    file.read()   
    for i in file:   
        f.write(i[1] + '\n')   
f.close()

Answer 1

The problem in your code that you don't open the files to read.

Try this one:

from os import listdir
from os.path import isfile, join 

folder_path = 'E:\\Project\\tests'

# get the full names of all the txt files in your folder   
files = [join(folder_path, f) for f in listdir(folder_path) if isfile(join(folder_path, f)) and f.endswith(".txt")] 

f = open('outputFile.txt', 'a')   

for file in files:   
    line = open(file,"r").readlines()[1] # line will be equal to the second line of the file
    f.write(line + '\n')   
f.close()