How to Reverse a singly-linked list in Python
The challenge
Implement a function reverse_list that takes a singly-linked list of nodes and returns a matching list in the reverse order.
Assume the …
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330 articles about python development, tools, and best practices
Calculating Simple Time Difference in Python
The challenge
In this challenge, you will be given a series of times at which an alarm goes off. Your task will be to determine the maximum time …
Read Article →Calculating Odd/Even number of divisors in Python
The challenge
Given an integer n return "odd" if the number of its divisors is odd. Otherwise, return "even".
Note: big inputs …
Read Article →Calculate possibilities of throwing a coin N times in Python
The challenge
In this challenge, you will be given an integer n, which is the number of times that is thrown a coin. You will have to return an array …
Read Article →How to Convert Integer to Whitespace format in Python
The challenge
Hereinafter, [space] refers to " ", [tab] refers to "\t", and [LF] refers to "\n" for illustrative …
How to Perform Frog Jumping in Python
The challenge
You have an array of integers and have a frog at the first position
[Frog, int, int, int, ..., int]
The integer itself may tell you the …
Read Article →How to Calculate the area of a regular N sides polygon inside a circle of radius R in Python
The challenge
Write the following function:
def area_of_polygon_inside_circle(circle_radius, number_of_sides):
It should calculate the area of a …
Read Article →How to create an Image Host Filename Generator in Python
The challenge
You are developing an image hosting website.
You have to create a function for generating random and unique image filenames.
Create a …
Read Article →How to Find the Missing Alphabets in Python
The challenge
Task
Given string s, which contains only letters from a to z in lowercase.
A set of the alphabet is given by abcdefghijklmnopqrstuvwxyz. …
Longest Alphabetical Substring (Python)
The challenge
Find the longest substring in alphabetical order. If there are multiple substrings of the same maximum length, return the one that …
Read Article →How to Binary to Text (ASCII) Conversion in Python
The challenge
Write a function that takes in a binary string and returns the equivalent decoded text (the text is ASCII encoded).
Each 8 bits on the …
Read Article →How to Find the Row of the Odd Triangle in Python
The challenge
Given a triangle of consecutive odd numbers:
1
3 5
7 9 11
13 15 17 19
21 23 …Solving Number Zoo Patrol in Python
The challenge
Write a function that takes a shuffled list of unique numbers from 1 to n with one element missing (which can be any number including n …
How to Round up to the Next Multiple of 5 in Python
The challenge
Given an integer as input, can you round it to the next (meaning, “higher”) multiple of 5?
Examples:
input: output:
0 …How to satisfy Wilson Primes in Python
The challenge
Wilson primes satisfy the following condition. Let P represent a prime number.
Then ((P-1)! + 1) / (P * P) should give a whole number. …
Writing a Sleigh Authentication in Python
The challenge
Christmas is coming and many people dreamed of having a ride with Santa’s sleigh. But, of course, only Santa himself is allowed to …
Read Article →Solving for Multiple of Index in Python
The challenge
Return a new array consisting of elements which are multiple of their own index in input array (length > 1).
Examples:
[22, -6, 32, …
Read Article →How to Find an item’s Alphabet Position in Python
The challenge
When provided with a letter, return its position in the alphabet.
Input :: “a”
Ouput :: “Position of alphabet: …
Read Article →How to write a Lazy Repeater Helper in Python
The challenge
The make_looper() function takes a string (of non-zero length) as an argument. It returns a function. The function it returns will …
How to write a String Case Conversion Helper in Python
The challenge
In this challenge, you will make a function that converts between camelCase, snake_case, and kebab-case.
You must write a function that …
Read Article →How to create Interleaving Arrays in Python
The challenge
Create a function, that accepts an arbitrary number of arrays and returns a single array generated by alternately appending elements …
Read Article →How to Find the Largest product in a Series in Python
The challenge
Complete the greatestProduct method so that it’ll find the greatest product of five consecutive digits in the given string of …
How to Calculate the Least Common Multiple in Python
The challenge
Write a function that calculates the least common multiple of its arguments; each argument is assumed to be a non-negative integer. In …
Read Article →How to Solve Caesar Cipher Helper in Python
The challenge
Write a class that, when given a string, will return an uppercase string with each letter shifted forward in the alphabet by however …
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