text: # string to number float int integer
  string = "333.11231"
  float(string)
  int(float(string))
  
  # check type
  # instance of str or any subclass of str
  vaar = "I'm a string"
  if isinstance(vaar, str):
  		print("Truly a string")
  
  # check if the type of vaar is exactly str:
  if type(vaar) is str:
     print("Only a String")
  
  # dict keys to list
  some_dict = {"dog": "woof", "cat": "meow"}
  key_list = list(some_dict.keys())
  print(key_list)
  
  
  