WordCount

Save all functions into the same file named words.py.

1. Write the function word_count() that takes a string with a text and returns the number of words in that text. The function must pass the following doctest:

   >>> word_count("He's five feet two and he's six feet four...")
   9
   >>> word_count("He fights with missiles and with spears...")
   7
   >>> word_count("He's been a soldier for a thousand years...")
   8
   

   Note

   You can download a file with tests words.txt

2. Write the function initials() that takes a non-empty string with a text and another string with a single character that is a lowercase letter and returns the percentage of words in that text beginning with the given letter. The function must pass the following doctest:

   >>> round(initials('This land is your land, this land is my land...', 'l'), 2)
   40.0
   >>> round(initials('This land is your land, this land is my land...', 't'), 2)
   20.0
   >>> round(initials("Hello darkness, my old friend, I come to talk with you again...", 't'), 2)
   16.67
   >>> round(initials('Hey mister Tambourine man, play a song for me...', 'm'), 2)
   33.33
   
   

   Note

   You can download a file with tests initials.txt

3. Write the function suffix() that takes a string s with a text and another string suf with a shorter text and returns a list with the words in s that finish with suf in alphabetical order and without repetitions. We can assume that there are no punctuation marks in the text. Examples:

   >>> suffix('So you think you can tell heaven from hell', 'ell')
   ['hell', 'tell']
   >>> suffix('But they sent me away to teach me how to be sensible logical responsible practical and they showed me a world where I could be so dependable clinical intellectual cynical', 'al')
   ['clinical', 'cynical', 'intellectual', 'logical', 'practical']
   >>> suffix('But they sent me away to teach me how to be sensible logical responsible practical and they showed me a world where I could be so dependable clinical intellectual cynical', 'ble')
   ['dependable', 'responsible', 'sensible']
   >>> suffix('The answer my friend is blowing in the wind', 'ing')
   ['blowing']
   
   

   Note

   You can download a file with tests suffix.txt

   Solution

   You have some solutions in the file words.py.