无法在 Python 中写入 .txt 文件

Question

This is my code:

import os
os.chdir("C:\\Users\\satvi_000\\Downloads")

if os.path.exists('new_file.txt')==False:  
    create_file= open("new_file.txt",'w')  #This is just to  create the file 
                                                  #in case it doesn't exist
    create_file.close()
file= open('new_file.txt','r+')

data= file.read()

file.write("blah blah blah ")

I want to create a file( if it doesn't already exist) and write some data to it. I'm doing this as a part of a larger program and tested it separately to see what the problem was and I can't quite figure it out yet. I will be writing to this file again and again in the larger program, and the file will also be modified everytime the program is run. What's going wrong here?

Answer 1

May be this can help you

Python Print String To Text File

Try to use with open("new_file.txt", "w") as text_file:

Answer 2

Try closing the file in the end. file.close()

Answer 3

import os
os.chdir("C:\\Users\\satvi_000\\Downloads")

if os.path.exists('new_file.txt')==False:  
    create_file= open("new_file.txt",'w')  #This is just to  create the file 
                                                  #in case it doesn't exist
    create_file.close()
file= open('new_file.txt','r+')

data= file.read()

file.write("blah blah blah ")
file.close()

Answer 4

As you are writing the file again and again, so it will keep modifying the file, erasing earlier data present in the same file. If you want to update the file, open the file with append (a) permission and not with write operation.

And in your code, the moment you open a file with 'w' permission, it will create the file by default if the file does not exist. And you can directly write into the file. You dont need to reopen it, it is already open.

Thanks.