input: Write a function to remove all punctuations from a given string of sentences. If the given string is empty then return the empty string. If the input string contains no punctuations then return the same string.
  import 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("NoPunctuation")=="NoPunctuation"
  assert remove_punctuations("")==""
  assert remove_punctuations("!@#$%^&*()_+")==""
output: import string
  
  def remove_punctuations(s):
      return s.translate(str.maketrans('', '', string.punctuation))