Home » Python

finally keyword with example in Python

Python finally keyword: Here, we are going to learn about the finally keyword with example.
Submitted by IncludeHelp, on April 15, 2019

Python finally keyword

finally is a keyword (case-sensitive) in python, it is a part of "try...except...finally" block, it is used to define a block (of coding statements) to execute finally i.e. no matter there is an exception or not in the "try" block. The finally block executes in any case.

Syntax of finally keyword

    try:
        statement(s)-1
    except:
        statement(s)-2
    finally:
        statement(s)-3

While executing the statement(s)-1, if there is any exception raises, control jumps to except block and statement(s)-2 executes, in case of finally block – no matter there is an exception in try block or not, statement(s)-3 executes in any case.

Example:

    Input:
    a = 10
    b = 0

    try:
        # no error
        result = a%b
        print(result)
    
    except:
        print("There is an error")
    finally:
        print("Finally block, Bye Bye")

    Output:
    There is an error
    Finally block, Bye Bye

Python examples of finally keyword

Example 1: Find modulus of two number and handle exception, if divisor is 0.

# python code to demonstrate example of 
# try, except, finally keyword 

# Find modulus of two number and 
# handle exception, if divisor is 0

a = 10
b = 3

try:
    # no error
    result = a%b
    print(result)
    
    # assign 0 to b
    # an error will occur
    b = 0
    result = a%b
    print(result)
    
except:
    print("There is an error")
finally:
    print("Finally block, Bye Bye")

Output

1
There is an error
Finally block, Bye Bye