Question

1|>try:

2|>>some_function()
3|>[fill in this blank]
Q: In the code above, we are attempting to call some_function(). If it fails, we want to print "An error occurred." If it succeeded, we want to print "No errors occurred!". Either way, we want to print "Execution has ended."
Which of the following will accomplish this if used to fill in the blank?

Answer 1

To handle both successful execution and exceptions in Python, a try-except-finally block is used. The code provided uses this structure to print respective messages whether 'some_function()' executes successfully or an error occurs, and to print 'Execution has ended.' either way.

Step-by-step explanation:

To achieve the desired functionality in Python, you would need to use a try-except-finally block. The try block allows you to test a block of code for errors. The except block lets you handle the error. The finally block lets you execute code, regardless of the result of the try- and except blocks. Here is how you can write your code:

1|>try:
2|>>some_function()
3|>except:
4|>>print("An error occurred.")
5|>finally:
6|>>print("Execution has ended.")

If some_function() does not raise an error, the except block will be skipped, and the finally block will be executed, printing "Execution has ended." On the other hand, if an error occurs, "An error occurred." will be printed by the except block before the finally block prints "Execution has ended."

To indicate success when no errors occurred, you can add another print statement in the try block after the function call:

1|>try:
2|>>some_function()
3|>>print("No errors occurred!")
4|>except:
5|>>print("An error occurred.")
6|>finally:
7|>>print("Execution has ended.")