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Problems
PCAP (Python Institute)

PCAP (Python Institute) problems

57 problems for PCAP (Python Institute) practice, in Python Programming, each with a worked solution. Try each one on paper first, then check your answer.

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1.

A pipeline has three stages. For the input "Hello, World", it should give ["hello", "world"], but…

High School (11–12), High School (9–10), Undergraduate, General · Testing and DebuggingA-Level, IB, PCAP (Python Institute)

Medium

2.

A function is_even(n) should say whether a whole number is even.

High School (11–12), High School (9–10), Undergraduate, General · Testing and DebuggingA-Level, IB, PCAP (Python Institute)

Easy

3.

Write an endless generator primes() that gives 2, 3, 5, 7, 11,...

High School (11–12), High School (9–10), Undergraduate, General · Comprehensions, Iterators and GeneratorsPCAP (Python Institute)

Hard

4.

Write an endless generator squares() that gives 1, 4, 9, 16,...

High School (11–12), High School (9–10), Undergraduate, General · Comprehensions, Iterators and GeneratorsPCAP (Python Institute)

Medium

5.

Follow the generator

High School (11–12), High School (9–10), Undergraduate, General · Comprehensions, Iterators and GeneratorsPCAP (Python Institute)

Medium

6.

High School (11–12), High School (9–10), Undergraduate, General · Comprehensions, Iterators and GeneratorsPCAP (Python Institute)

Medium

7.

For each, say whether it is an iterable that is not an iterator, or an iterator, and whether it can…

High School (11–12), High School (9–10), Undergraduate, General · Comprehensions, Iterators and GeneratorsPCAP (Python Institute)

Easy

8.

A list of pairs students = [("Asha", 72), ("Ravi", 85), ("Meera", 72), ("Kabir", 90)].

High School (11–12), High School (9–10), Undergraduate, General · Comprehensions, Iterators and GeneratorsPCAP (Python Institute)

Medium

9.

High School (11–12), High School (9–10), Undergraduate, General · Comprehensions, Iterators and GeneratorsPCAP (Python Institute)

Easy

10.

Given names = ["Asha", "Ravi", "Meera"] and marks = [72, 85, 64], use zip and a comprehension to…

High School (11–12), High School (9–10), Undergraduate, General · Comprehensions, Iterators and GeneratorsPCAP (Python Institute)

Easy

11.

The matrix is m = [[1, 2], [3, 4], [5, 6]], three rows of two.

High School (11–12), High School (9–10), Undergraduate, General · Comprehensions, Iterators and GeneratorsPCAP (Python Institute)

Medium

12.

Write this comprehension as a plain loop, and say what it gives for numbers = [1, 2, 3, 4, 5].

High School (11–12), High School (9–10), Undergraduate, General · Comprehensions, Iterators and GeneratorsPCAP (Python Institute)

Easy

13.

Write each loop as a list comprehension.

High School (11–12), High School (9–10), Undergraduate, General · Comprehensions, Iterators and GeneratorsPCAP (Python Institute)

Easy

14.

A to-do list is kept in a JSON file as a list of texts.

High School (11–12), High School (9–10), Undergraduate, General · Files and Data FormatsA-Level, IB, PCAP (Python Institute)

Medium

15.

Write load_list(name) that gives the list that is saved in a JSON file.

High School (11–12), High School (9–10), Undergraduate, General · Files and Data FormatsA-Level, IB, PCAP (Python Institute)

Medium

16.

A file marks.txt holds Asha:72, Ravi:85, Meera:64, one on each line.

High School (11–12), High School (9–10), Undergraduate, General · Files and Data FormatsBoard Exam, A-Level, IB, PCAP (Python Institute)

Medium

17.

Write a function longest_line(name) that gives the longest line of a file, without its new line.

High School (11–12), High School (9–10), Undergraduate, General · Files and Data FormatsBoard Exam, A-Level, IB, PCAP (Python Institute)

Easy

18.

Make a file poem.txt with the three lines roses are red, violets are blue and sugar is sweet.

High School (11–12), High School (9–10), Undergraduate, General · Files and Data FormatsBoard Exam, A-Level, IB, PCAP (Python Institute)

Medium

19.

A file nums.txt has one number on each line: 4, 9, 2, 7.

High School (11–12), High School (9–10), Undergraduate, General · Files and Data FormatsBoard Exam, A-Level, IB, PCAP (Python Institute)

Easy

20.

Write a function read_number(name) that reads a file with one whole number in it, and gives the…

High School (11–12), High School (9–10), Undergraduate, General · Files and Data FormatsBoard Exam, A-Level, IB, PCAP (Python Institute)

Medium

21.

A file visits.txt is made with "w", and the line Asha is written.

High School (11–12), High School (9–10), Undergraduate, General · Files and Data FormatsBoard Exam, A-Level, IB, PCAP (Python Institute)

Easy

22.

A class Note has an attribute rupees. Write __lt__ and __str__ so that sorted puts a list of notes…

High School (11–12), High School (9–10), Undergraduate, General · Inheritance and Special Methods, Classes and ObjectsPCAP (Python Institute)

Medium

23.

For each line of code, name the special method that Python calls.

High School (11–12), High School (9–10), Undergraduate, General · Inheritance and Special Methods, Classes and ObjectsPCAP (Python Institute)

Easy

24.

The loop below works for any animal. Add a class Bird that says Tweet, and a class Parrot built on…

High School (11–12), High School (9–10), Undergraduate, General · Inheritance and Special Methods, Classes and ObjectsA-Level, IB, PCAP (Python Institute)

Medium

25.

High School (11–12), High School (9–10), Undergraduate, General · Inheritance and Special Methods, Classes and ObjectsA-Level, IB, PCAP (Python Institute)

Easy

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