input: from typing import List
  
  def remove_punctuations(s: str) -> str:
      """Remove all punctuations from a given string of sentences.
      >>> remove_punctuations("This is a sample string!")
      'This is a sample string'
      """
output:     punctuations = '''!()-[]{};:'"\,<>./?@#$%^&*_~'''
      result = ""
      for char in s:
          if char not in punctuations:
              result += char
      return result