title: How do I make this case-insensitive, in Python 3.4.3?
body: <p>When the user is asked to search for a word, I want it to be case-insensitive.</p>
  
  <pre><code>import string
  usersentence= input("Please type in a sentence without punctuation: ")
  
  usersentence = ''.join(ch for ch in usersentence if ch not in set(string.punctuation))
  print (usersentence.upper())
  for i in range(1):      # number of words you wont to search
      word= input("Please enter a word you want to search for in the sentence: ")
      words = usersentence.split(' ')
      passed = False      # Something to check if the word is found
      for (i, words) in enumerate(words):
          if (words == word): 
              print("your word appears in position(s): ")
              print(i+1)
              passed = True       # The word has been found
  
      if not passed:
          print("Sorry your word does not seem to be here")
  </code></pre>