Python error message io.UnsupportedOperation: not readable

Question

I made a simple program but It shows the following error when I run it:

line1 = [] line1.append("xyz ") line1.append("abc") line1.append("mno")  file = open("File.txt","w") for i in range(3):     file.write(line1[i])     file.write("\n")  for line in file:     print(line) file.close() 

It shows this error message:

File "C:/Users/Sachin Patil/fourth,py.py", line 18, in
for line in file:

UnsupportedOperation: not readable

Answer 1

You are opening the file as "w", which stands for writable.

Using "w" you won't be able to read the file. Use the following instead:

file = open("File.txt", "r") 

Additionally, here are the other options:

"r"   Opens a file for reading only. "r+"  Opens a file for both reading and writing. "rb"  Opens a file for reading only in binary format. "rb+" Opens a file for both reading and writing in binary format. "w"   Opens a file for writing only. "a"   Open for writing. The file is created if it does not exist. "a+"  Open for reading and writing.  The file is created if it does not exist.