try and except: Catching an Exception Instead of Crashing

Why does Python abandon the rest of a try block the instant a line raises — and where exactly does execution land?

Finger exercises

Short drills on what this video just taught. Write the code, run the checks, and reveal the answer only if you are stuck.

0 / 5 passed

Exercise 1 of 5

Four snippets, four exceptions

Each of these snippets raises an exception the moment it runs:

nums = [10, 20, 30], then nums[7]
'total: ' + 5
int('hello')
print(subtotal), where subtotal was never defined

Assign to exception_names a list of four strings naming the exception each snippet raises, in that same order. Spell each name the way Python spells it (the way KeyboardInterrupt is spelled — capitals and no spaces).

# Name the exception each snippet above raises, in order.
exception_names = [...]  # your code here

# Name the exception each snippet above raises, in order.
exception_names = [...]  # your code here

Python runs in your browser

⌘/Ctrl + Enter runs

is a list

has one name per snippet

names the exception each snippet raises

←Previous Debugging by Bisection: Print Statements as Evidence Next Named Exception Handlers, else, finally, and raise →