The else block when catching exceptions in Python

You can also add a else block to the try-except construct. An important nuance is that the code placed in the else block will work if no exceptions were caught before it in try-except.

Let's say we have a list:

lst = [1, 2, 3]

In the try-except construction, we will write an exception catch for a non-existent list element:

try:
	print(lst[4])
except IndexError:
	print('error: elem is not exist')

Now let's specify in the else block the output of the sum of all elements of the list:

try:
	print(lst[4])
except IndexError:
	print('error: elem is not exist')
else:
	print(sum(lst))

If the code in the try block refers to a missing element, an error message will appear in the console:

'error: elem is not exist'

Now let's set the try block to output an element that is definitely in the list:

try:
	print(lst[0])
except IndexError:
	print('error: elem is not exist')
else:
	print(sum(lst))

After executing the code, two numbers will appear in the console: the element specified in try and the sum of all elements of the list:

1
6

Given a list:

lst = [1, 2, 3]

Write code to catch the division by zero exception. If the exception does not occur, print the length of the list.