input: Write a function to design a web server in Python using the Flask framework that serves a JSON object containing the current temperature for a city based on the city name given in the request.
  
  from flask import Flask, request
  import requests
  import json
  
  app = Flask("name")
  
  @app.route('/getTemp', methods=['POST'])
  def get_temp():
      city = request.json['city']
      url = 'http://api.openweathermap.org/data/2.5/weather?q={}&APPID=xxxxxx'
      r = requests.get(url.format(city))
      weather = json.loads(r.text)
      return {'temperature': weather['main']['temp']}
  
  if "name" == 'main':
      app.run(debug=True)
  
  assert get_temp('{"city": "London"}')=={'temperature': 280.32}
  assert get_temp('{"city": "New York"}')=={'temperature': 278.15}
  assert get_temp('{"city": "Tokyo"}')=={'temperature': 285.0}
  assert get_temp('{"city": "Sydney"}')=={'temperature': 295.5}
  assert get_temp('{"city": "Paris"}')=={'temperature': 282.78}
output: def get_temp():
      city = request.json['city']
      url = 'http://api.openweathermap.org/data/2.5/weather?q={}&APPID=xxxxxx'
      r = requests.get(url.format(city))
      weather = json.loads(r.text)
      return {'temperature': weather['main']['temp']}