input: Write a python function to get the current temperature in Manhattan.
  assert isinstance(get_temperature_in_manhattan(), (int, float))
output: import requests
  
  def get_temperature_in_manhattan():
      api_key = 'your_api_key_here'
      url = f'http://api.openweathermap.org/data/2.5/weather?q=Manhattan&appid={api_key}&units=imperial'
      response = requests.get(url)
      data = response.json()
      temperature = data['main']['temp']
      return temperature