Issue reading file in Python

Question

I had some problems with my Python code. My code:

import os
logininfo = list()
with open(os.getcwd() + '/login/info.txt', 'r') as f:
     logininfo = f.readlines()

But my code isn't work, so how do I fix that?

Edit: I changed the quote and changed the ' to '

Problem 2: After I fix all that look like my computer is freeze now and I can't even move my mouse. After freeze for a while, the code make my computer ran to BSOD. What happened?

Okay, I think I see what the problem in problem 2 that my file was too big with 50 GB of login information of my server. Thanks you guy for helping me solve the problem 1.

Answer 1

Your problem is likely that your / (forward slashes) are supposed to be \ (backslashes). It is also a good practice to use os.path.join() when concatenating file paths. Make sure login\info.txt does not have a backslash in front of it. I printed the list afterwards to make sure it was working. Windows file paths use \\ .

import os
with open(os.path.join(os.getcwd(), 'login\info.txt'), 'r') as f:
    logininfo = f.readlines()
print(logininfo)

Answer 2

I believe the wrong thing is that you're using double slashs, when it should be:

import os

with open(os.getcwd() + ‘/login/info.txt’, 'r') as f:
     logininfo = f.readlines()

I reproduced the error here, created a file with the same folder structure as yours, and this definitely should work:

In [3]: with open(os.getcwd() + '/login/info.txt', 'r') as f:
   ...:     lines = f.readlines()
   ...:     for line in lines:
   ...:         print(line)
   ...: 
Olá,



deixa eu ver esse erro aqui

Answer 3

Regardless of OS, I would recommend using pathlib module to deal with system paths and to decrease ambiguity in OS path handling. So, regardless of OS, an API would be (including your code):

from pathlib import Path

file_path = Path.cwd() / 'login' / 'info.txt'

with open(file_path, 'r') as f:
    login_info = f.readlines()

Get familiar with that module (it's out of the box:) here: https://docs.python.org/3/library/pathlib.html