title: Finding the position of a word in a string
body: <p>With:</p>
  
  <pre><code>sentence= input("Enter a sentence")
  keyword= input("Input a keyword from the sentence")
  </code></pre>
  
  <p>I want to find the position of the keyword in the sentence. So far, I have this code which gets rid of the punctuation and makes all letters lowercase:</p>
  
  <pre><code>punctuations = '''!()-[]{};:'"\,&lt;&gt;./?@#$%^&amp;*_~'''#This code defines punctuation
  #This code removes the punctuation
  no_punct = "" 
  for char in sentence:
     if char not in punctuations:
         no_punct = no_punct + char
  
  no_punct1 =(str.lower (no_punct)
  </code></pre>
  
  <p>I know need a piece of code which actually finds the position of the word.</p>