This Python module provides a simple function to count the occurrences of each letter in a given string. It can be useful for text analysis or any situation where you need to analyze letter ...

As an FYI, nosferatu-man's and my solutions are better than S. Carton's, but require Python 2.4. The "key" parameter to sort/sorted does a "Decorate-Sort-Undecorate"[1] automatically, whereas the ...

while the string "nono" does not have two identical letters in a row. Define a function named double_letters that takes a single parameter. The parameter is a string. Your function must return True if ...