input: Write a function to remove all punctuations from a string of sentences and return the modified string. 
  
  def remove_punctuations(s):
      return s.translate(str.maketrans('', '', string.punctuation))
  
  assert remove_punctuations("This is a sample string!") == "This is a sample string"
  assert remove_punctuations("Hello, world!") == "Hello world"
  assert remove_punctuations("No punctuations here.") == "No punctuations here"
  assert remove_punctuations("This is a test: Success!") == "This is a test Success"
  assert remove_punctuations("") == ""
output: def remove_punctuations(s):
      return s.translate(str.maketrans('', '', string.punctuation))