input: Write a function to create a Python web application for a car insurance calculator using Flask. The application should have a page accessible via a POST request at the '/calculate' route where the user can input data such as age, gender, and car model. The function should return a calculated insurance price based on the input data and return it in JSON format. If the data cannot be processed, the function should return an error message in JSON format.
  
  from flask import Flask, request, jsonify
  
  def create_insurance_calculator():
      app = Flask(__name__)
  
      @app.route('/calculate', methods=['POST'])
      def calculate():
          try:
              data = request.get_json()
              age = data['age']
              gender = data['gender']
              car_model = data['car_model']
              insurance_price = 0.00  # This should be replaced with actual calculations
              return jsonify({'insurance_price': insurance_price})
          except Exception as e:
              return jsonify({'error': str(e)})
  
      return app
  
  assert create_insurance_calculator().calculate(data={'age': 25, 'gender': 'male', 'car_model': 'sedan'})==jsonify({'insurance_price': 0.00})
  assert create_insurance_calculator().calculate(data={'age': 30, 'gender': 'female', 'car_model': 'hatchback'})==jsonify({'insurance_price': 0.00})
  assert create_insurance_calculator().calculate(data={'age': 40, 'gender': 'male', 'car_model': 'suv'})==jsonify({'insurance_price': 0.00})
  assert create_insurance_calculator().calculate(data={'age': "invalid", 'gender': 'male', 'car_model': 'hatchback'})==jsonify({'error': "'str' object cannot be interpreted as an integer"})
  assert create_insurance_calculator().calculate(data={})==jsonify({'error': "'age'"})
output: def create_insurance_calculator():
      app = Flask(__name__)
  
      @app.route('/calculate', methods=['POST'])
      def calculate():
          try:
              data = request.get_json()
              age = int(data['age'])
              gender = data['gender']
              car_model = data['car_model']
              insurance_price = 0.00  # This should be replaced with actual calculations
              return jsonify({'insurance_price': insurance_price})
          except Exception as e:
              return jsonify({'error': str(e)})
  
      return app