input: Write a python function to parse a JSON string into a Python dictionary.
  assert parse_json('{"id":1,"name":"Testing","description":"This is a test"}') == {"id":1,"name":"Testing","description":"This is a test"}
  assert parse_json('{"key":"value"}') == {"key":"value"}
  assert parse_json('{"a":1,"b":2,"c":3}') == {"a":1,"b":2,"c":3}
output: import json
  
  def parse_json(json_string):
      return json.loads(json_string)