input: Write a function to remove all punctuations from a given string. The function should return the string with all punctuation marks removed.
  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("Python-is-fun!")=="Pythonisfun"
  assert remove_punctuations("")==""
  assert remove_punctuations("?!#")==""
output: def remove_punctuations(s):
      return s.translate(str.maketrans('', '', string.punctuation))