input: Write a function to create a web server using the Flask framework in Python that serves a JSON object containing the current temperature for a city based on the city name given in the request.
  import requests
  import json
  from flask import Flask, request
  
  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()=={'temperature': weather['main']['temp']}
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']}
  