input: Write a python function to parse a JSON string into a Python dictionary.
  assert parseJSON('{"name": "John", "age": 32}') == {"name": "John", "age": 32}
  assert parseJSON('{"city": "New York", "population": 8398748}') == {"city": "New York", "population": 8398748}
  assert parseJSON('{"key": "value"}') == {"key": "value"}
output: import json
  
  def parseJSON(json_string):
      return json.loads(json_string)