Python Try Except

The try statement lets code to be executed without making a running program stop even if errors are occurred.

The except statement is where exceptions errors are handled when errors are occurred.

Errors are faults or mistakes in the program which can make a program behave abnormally when it is run. Errors in the code are also called bugs in the programming world.

Types of Errors

There are two types of errors:

1. Syntax errors
2. Exceptions

Syntax Errors

Syntax errors are also called parsing errors. This type of error occurs due to mistakes in code syntax.

Example

The following code shows Indent expected error on line 3:

x = 1
while x < 5:
x += 1
print(x)

The only solution to handle syntax errors is to write the code syntax correctly. The correct form of above code is:

x = 1
while x < 5:
    x += 1
print(x)

Exceptions

Exceptions are errors which are occurred during execution of a program.

Example

This code will generate error because a value is not divisible by 0.

result = 5/0
print(result)

Handling Exceptions

Exceptions can be handled using the try expect statements.

Example

try:
    result = 5/0
    print(result)
except Exception as ex:
    print("Exception occurred")
    print(ex)

Handling Multiple Exceptions

A try statement may have multiple except clause for handling different exceptions.

Example

try:
    result = 5 / 0
    print(result)
except ZeroDivisionError:
    print("Divide by zero error occurred")
except NameError:
    print("Name Error occurred")

Built-in Exceptions

List of built-in exceptions in Python: