import os

from flask import Flask, request
from flask_jsonschema import JsonSchema, ValidationError

app = Flask(__name__)
app.config['JSONSCHEMA_DIR'] = os.path.join(app.root_path, 'schemas')

jsonschema = JsonSchema(app)

@app.errorhandler(ValidationError)
def on_validation_error(e):
    return "error"

@app.route('/books', methods=['POST'])
@jsonschema.validate('books', 'create')
def create_book():
    # create the book
    return 'success'

{
  "create": {
    "type": "object",
    "properties": {
      "title": {},
      "author": {}
    },
    "required": ["title", "author"]
  },
  "update": {
    "type": "object",
    "properties": {
      "title": {},
      "author": {}
    }
  }
}