input: Write a function to create a dictionary from a list of names and ages, with the names as keys and the ages as values. If the input list is empty, return an empty dictionary.
  assert create_people_dict("John (20), Jane (40), Alex (18), Peter (45)")=={'John': 20, 'Jane': 40, 'Alex': 18, 'Peter': 45}
  assert create_people_dict("")=={}
output: def create_people_dict(s):
      if not s:
          return {}
      people = s.split(", ")
      result = {}
      for person in people:
          name, age = person.split(" (")
          age = int(age.rstrip(")"))
          result[name] = age
      return result