Python readable method:
The readable is a method of IOBase class in Python. This method returns True if a file stream is readable. However, if the file stream is not readable, it will return False. If we call a read function with the file object that is not readable, it will raise an exception. The file is readable in only r mode, w+ mode and a+ mode.
Method Signature
The signature for the readable() method is as shown below.
fileObject.readable()Method parameters and return type
- Here, the readable method doesn’t take any parameters.
- However, it returns a boolean value True or False.
Python readable method Examples:
Example 1: In this case, we will open a file in write mode and check if it is readable or not.
# creating a file
f1 = open("test.txt", "w")
# Writing
f1.write("Hello World")
f1.write("\nPython Programming")
print("Is file readable ?",f1.readable())
#Trying to read
print(f1.read())
# closing
f1.close()
Output
Is file readable ? False
Traceback (most recent call last):
File "main.py", line 7, in
print(f1.read())
io.UnsupportedOperation: not readable
Example 2: In this case, we will open a file in w+ mode and check if it is readable or not.
# creating a file
f1 = open("test.txt", "w+")
# Writing
f1.write("Hello World")
f1.write("\nPython Programming")
print("Is file readable ?",f1.readable())
# closing
f1.close()
Output
Is file readable ? True
Example 3: In this case, we will open a file in append mode and check if it is readable or not.
# creating a file
f1 = open("test.txt", "a")
# Writing
f1.write("Its fun to learn Programming")
print("Is file readable ?",f1.readable())
# closing
f1.close()
Output
Is file readable ? False
Conclusion
Hence, the readable() method return a true value if the file is open for reading, false otherwise.
References
Happy Learning 🙂
