How to do Base64 Encoding in Python
The challenge
Create a function that converts the value of the String to and from Base64 using the ASCII character set.
Do not use built-in functions. …
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329 articles about python development, tools, and best practices
How to Find the Unique String in Python
The challenge
There is an array of strings. All strings contain similar letters except one. Try to find it!
find_uniq([ 'Aa', 'aaa', …How to convert a PascalCase string into snake_case in Python
The challenge
Complete the function/method so that it takes a PascalCase string and returns the string in snake_case notation. Lowercase characters …
How to Convert a Hex String to RGB in Python
The challenge
When working with color values it can sometimes be useful to extract the individual red, green, and blue (RGB) component values for a …
Read Article →How to Create a Hashtag Generator in Python
The challenge
Write a hashtag generator function that takes a string and returns a #HashCodeString of it.
The hashtag generator should perform the …
Read Article →How to Move Zeros to the End in Python
The challenge
Write an algorithm that takes an array and moves all of the zeros to the end, preserving the order of the other elements.
move_zeros([1, …Regex for Gregorian Date Validation in Python
The challenge
Write a regular expression that validates the gregorian date in the format “DD.MM.YYYY”
Correct date examples: …
Read Article →How to Create Your Own Python Split Function
The challenge
Write your own implementation of the built-in split function in Python.
The following rules must be adhered to:
- the function cannot …
How to create a Domain Name Validator in Python
The challenge
Create a domain name validator mostly compliant with RFC 1035, RFC 1123, and RFC 2181
The following rules apply:
- Domain name may …
How to write a validDate Regex in Python
The challenge
Your task is to write a regular expression (regex) that will match a string only if it contains at least one valid date, in the format …
Read Article →How to Validate Passwords with Regex in Python
The challenge
You need to write regex that will validate a password to make sure it meets the following criteria:
- At least six characters long …
How to Count the Characters in Python
The challenge
The goal of this challenge is to write a function that takes two inputs: a string and a character. The function will count the number of …
Read Article →How to create a Nickname Generator in Python
The challenge
Write a nickname generator function, nicknameGenerator that takes a string name as an argument and returns the first 3 or 4 letters as a …
How to Check for Factor in Python
The challenge
This function should test if the factor is a factor of base.
Return true if it is a factor or false if it is not.
About factors …
Read Article →Understanding Bitwise Operators in Python
There are 6 binary/bitwise operators in Python:
- Complement/Not (
~) - And (
&) - Or (
|) - XOR (
^) - Left Shift (
<<) - Right Shift (
>>)
A …
Read Article →How to Check if String is a Palindrome in Python
The challenge
Write a function that checks if a given string (case insensitive) is a palindrome.
The solution in Python
Option 1:
def …Find the Maximum Length Difference between Lists/Arrays in Python
The challenge
You are given two arrays a1 and a2 of strings. Each string is composed of letters from a to z. Let x be any string in the first array …
Largest Number Groupings in String in Python
The challenge
You are be given a string that has lowercase letters and numbers. Your task is to compare the number groupings and return the largest …
Read Article →How to Sort a List of Numbers in Python
The challenge
Finish the solution so that it sorts the passed-in array/list of numbers. If the function passes in an empty array/list or null/None …
Read Article →Ordered Count of Characters in Python
The challenge
Count the number of occurrences of each character and return it as a list of tuples in order of appearance. For empty output return an …
Read Article →Largest Pair Sum in Array in Python
The challenge
Given a sequence of numbers, find the largest pair sum in the sequence.
For example
[10, 14, 2, 23, 19] --> 42 (= 23 + 19)
[99, 2, …Alphabet Symmetry in Python
The challenge
Consider the word "abode". We can see that the letter a is in position 1 and b is in position 2. In the alphabet, a and b are …
Sum of Odd Cubed Numbers in Python
The challenge
Find the sum of the odd numbers within an array, after cubing the initial integers. The function should return None if any of the values …
Halving Sum in Python
The challenge
Given a positive integer n, calculate the following sum:
n + n/2 + n/4 + n/8 + ...
All elements of the sum are the results of integer …
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