Application Factories

Flask recommends using application factories for flexibility and testability. Flask-JSONRPC integrates naturally with this pattern.

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Creating an Application Factory

from flask import Flask
from flask_jsonrpc import JSONRPC

def create_app(config=None):
    app = Flask(__name__)
    if config:
        app.config.update(config)

    # JSON-RPC endpoint
    jsonrpc = JSONRPC(app, "/api", enable_web_browsable_api=True)

    # Example method
    @jsonrpc.method("ping")
    def ping():
        return "pong"

    return app

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Benefits

• Easy testing (create multiple app instances)

• Clean separation between app and extensions

• Works with blueprints and modular JSON-RPC endpoints