readable(): checks if a file object allows read operations

readable()

In file read mode ( r )

fob=open('data1.txt','r')
print(fob.readable()) # True

Using write mode

fob=open('data1.txt','w')
print(fob.readable()) # False

Using append mode

fob=open('data1.txt','a')
print(fob.readable()) # False

Using read and write

fob=open('data1.txt','+a')
print(fob.readable()) # True

Handling Non-Existent Files

When trying to open a file that doesn't exist, Python will raise an error. We can handle this with a try-except block:

try:
    fob = open('non_existent.txt', 'r')
    print(fob.readable())
except FileNotFoundError:
    print("File not found.")

Use Case: Checking Read Permissions

This can be useful in scenarios where a program needs to ensure read access before processing the file:

fob = open('data.txt', 'r')
if fob.readable():
    print("File is readable, proceeding with operations.")
else:
    print("File is not readable.")