Here are some Python programming challenges for practice:

1. Reverse a String: Write a function to reverse a given string.
2. Palindrome Check: Write a function to check if a given string is a palindrome.
3. Anagram Check: Write a function to check if two given strings are anagrams of each other.
4. Factorial: Write a function to compute the factorial of a given number.
5. Fibonacci Sequence: Write a function to generate the Fibonacci sequence up to a specified number of terms.
6. Check Prime: Write a function to check if a given number is prime.
7. Armstrong Number: Write a function to check if a given number is an Armstrong number.
8. String Reversal in Place: Write a function to reverse a string in place without using any built-in functions or slicing.
9. Count Vowels and Consonants: Write a function to count the number of vowels and consonants in a given string.
10. Binary to Decimal Conversion: Write a function to convert a binary number to its decimal equivalent.
11. Decimal to Binary Conversion: Write a function to convert a decimal number to its binary equivalent.
12. Find Missing Number: Given an array containing n distinct numbers taken from 0, 1, 2, ..., n, write a function to find the one missing from the sequence.
13. Merge Sort: Write a function to implement the merge sort algorithm to sort an array of integers.