text: i = 5  # not str
  
  print(isinstance(i, str))
  
  s = 'abc'  # string
  
  print(isinstance(s, str))
  
  # without validation
  def process_string(input_str):
      print('Processing', input_str)
  
  process_string('abc')
  
  process_string(100)
  
  # validating input is string
  def process_string(input_str):
      if (isinstance(input_str, str)):
          print('Processing', input_str)
      else:
          print('Input Must be String')
  
  
  process_string('abc')
  
  process_string(100)
  