Module 5

>Errors, Files and OOP

Handle problems safely, save data in files, and organize programs with classes.

// Lessons

// Quiz questions

// Reading time

51 min

// Exam length

15 Q

// Coding exercises

Coding practice: write it yourself

Real Python, real checks: write your answer, press Run checks, and keep going until it passes. (0/4 passed this visit)

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Not passed yet

Divide 900 by people = 0 inside try/except so that instead of a crash it prints People must be more than zero.

total = 900
people = 0
# try the division, catch ZeroDivisionError

Not passed yet

The text "abc" should become a number. Convert it inside try/except ValueError; on failure print not a number.

text = "abc"
# int(text) will raise — handle it

Not passed yet

Create class Dog whose __init__ takes name, with method bark() returning " says Woof". Print Dog("Rex").bark().

class Dog:
    def __init__(self, name):
        # store name

    def bark(self):
        # return the sentence

print(Dog("Rex").bark())

Not passed yet

Animal.speak() returns "...". Make Cat(Animal) override it to return "Meow", then print Cat().speak().

class Animal:
    def speak(self):
        return "..."

class Cat(Animal):
    # override speak

print(Cat().speak())

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