PyPro: Challenge 2

PyPro: Challenge 2#

This challenge is due on Saturday, October 5th, 2024, at 8pm.#

These exercises offer a diverse array of tasks that assess your comprehension of fundamental Python concepts such as loops, data types, string manipulations, list comprehensions, and higher-order functions.

Levels

Level Description

Estimated Completion Time per Exercise

L1

Beginner. The solutions can typically be found in standard textbooks.

5 - 10 minutes

L2

Intermediate. Requires problem-solving skills. Solutions are not directly found in textbooks.

10 - 20 minutes

L3

Advanced. You should be capable of using Python to solve more intricate problems involving libraries, data structures, and algorithms.

20 - 30 minutes

Question 1#

Level 1

Task:
Develop a program to find all numbers between 2000 and 3200 (inclusive) that are divisible by 7 but not multiples of 5. Display these numbers as a single line of output, separated by commas.

Question 2#

Level 1

Task:
Create a function that computes the factorial of a specified integer. Display the result in a single line of output. For example, if the input is:
8
Then, the output should be:
40320

Question 3#

Level 1

Task:
Given an integer n, generate a dictionary with entries (i, i*i) for all integers from 1 to n (inclusive). Print the resulting dictionary. For example, if the input is:
8
Then, the output should be:
{1: 1, 2: 4, 3: 9, 4: 16, 5: 25, 6: 36, 7: 49, 8: 64}

Question 4#

Level 1

Task:
Create a program that reads a series of comma-separated numbers from the console, then generates and prints both a list and a tuple containing those numbers. For example, if the input is:
34,67,55,33,12,98
The output should be:
['34', '67', '55', '33', '12', '98']
('34', '67', '55', '33', '12', '98')

Question 5#

Level 1

Task:
Create a class that has two methods:

  • getString: To accept a string input from the console.

  • printString: To display the string in uppercase.
    Include a simple test function to demonstrate the class methods.

Question 6#

Level 2

Task:
Write a program that calculates and prints values based on the formula:
[ Q = \sqrt{\frac{2 \times C \times D}{H}} ]
Here, C and H are fixed constants with values 50 and 30, respectively. D is a variable whose values are input to the program as a comma-separated sequence. For example, if the input is:
100,150,180
Then, the output should be:
18,22,24

Question 7#

Level 2

Task:
Write a program that accepts two numbers, X and Y, as input and generates a 2-dimensional list. The value at the i-th row and j-th column should be the product of i and j. For example, if the input is:
3,5
The output should be:
[[0, 0, 0, 0, 0], [0, 1, 2, 3, 4], [0, 2, 4, 6, 8]]

Question 8#

Level 2

Task:
Write a program that accepts a comma-separated list of words, sorts them alphabetically, and then prints them in a single line, separated by commas. For example, if the input is:
without,hello,bag,world
The output should be:
bag,hello,without,world

Question 9#

Level 2

Task:
Create a program that reads multiple lines of input and outputs each line with all characters converted to uppercase. For example, if the input is:
Hello world
Practice makes perfect
The output should be:
HELLO WORLD
PRACTICE MAKES PERFECT

Question 10#

Level 2

Task:
Write a program that reads a sequence of whitespace-separated words, removes all duplicate words, sorts them alphanumerically, and then prints the resulting words. For example, if the input is:
hello world and practice makes perfect and hello world again
The output should be:
again and hello makes perfect practice world

Question 11#

Level 2

Task:
Create a program that takes a sequence of 4-digit binary numbers, checks which ones are divisible by 5, and prints them as a comma-separated sequence. For example, if the input is:
0100,0011,1010,1001
The output should be:
1010
Note: Assume the input is provided through the console.

Question 12#

Level 2

Task:
Develop a program that finds all numbers between 1000 and 3000 (inclusive) where each digit is an even number. Print the results as a comma-separated sequence in a single line.

Question 13#

Level 2

Task:
Write a program that counts the number of letters and digits in a given sentence. For example, if the input is:
hello world! 123
The output should be:
LETTERS 10
DIGITS 3

Question 14#

Level 2

Task:
Create a program that counts and prints the number of uppercase and lowercase letters in a given sentence. For example, if the input is:
Hello world!
The output should be:
UPPER CASE 1
LOWER CASE 9

Question 15#

Level 2

Task:
Write a program that calculates the value of a + aa + aaa + aaaa given a digit as the value of a. For example, if the input is:
9
The output should be:
11106

Question 16#

Level 2

Task:
Use a list comprehension to generate a list of squares for each odd number in a given sequence of comma-separated values. For example, if the input is:
1,2,3,4,5,6,7,8,9
The output should be:
1,3,5,7,9

Question 17#

Level 2

Task:
Create a program that calculates the net amount in a bank account based on a transaction log input. The log format is:
D 100 (Deposit 100)
W 200 (Withdraw 200)
Suppose the following input is provided:
D 300
D 300
W 200
D 100
The output should be:
500

Question 18#

Level 3

Task:
Write a program that checks the validity of passwords based on the following criteria:

  1. At least one lowercase letter [a-z]

  2. At least one digit [0-9]

  3. At least one uppercase letter [A-Z]

  4. At least one character from [$#@]

  5. Minimum length of 6 characters

  6. Maximum length of 12 characters
    Input is provided as a sequence of comma-separated passwords. Valid passwords should be printed, separated by commas. For example, if the input is:
    ABd1234@1,a F1#,2w3E*,2We3345
    The output should be:
    ABd1234@1

Question 19#

Level 3

Task:
Create a program that sorts a list of (name, age, height) tuples based on the following priority:

  1. Name (alphabetically)

  2. Age (numerically)

  3. Height (numerically)
    For example, if the input is:
    Tom,19,80
    John,20,90
    Jony,17,91
    Jony,17,93
    Json,21,85
    The output should be:
    [('John', '20', '90'), ('Jony', '17', '91'), ('Jony', '17', '93'), ('Json', '21', '85'), ('Tom', '19', '80')]

Question 20#

Level 3

Task:
Define a class that includes a generator to yield numbers divisible by 7 within a given range from 0 to n.

Question 21#

Level 3

Task:
A robot moves on a grid starting from the origin

point (0,0). It can move UP, DOWN, LEFT, or RIGHT by a specified number of steps. Write a program to calculate the distance from the current position to the origin after a series of movements. If the distance is a float, print the nearest integer. For example, if the input is:
UP 5
DOWN 3
LEFT 3
RIGHT 2
The output should be:
2

Question 22#

Level 3

Task:
Create a program to calculate the frequency of words from the input. Display the output with the keys sorted alphabetically. For example, if the input is:
New to Python or choosing between Python 2 and Python 3? Read Python 2 or Python 3.
The output should be:
2:2
3.:1
3?:1
New:1
Python:5
Read:1
and:1
between:1
choosing:1
or:2
to:1

Question 23#

Level 1

Task:
Create a function that calculates and returns the square of a given number.

Question 24#

Level 1

Task:
Python provides built-in documentation for each built-in function. Create a program that displays the documentation for abs(), int(), and raw_input(). Also, add documentation for a user-defined function.

Question 25#

Level 1

Task:
Define a class with both a class attribute and an instance attribute of the same name. Show the difference between the two by printing the class attribute and the instance attribute separately.

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