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    <p>What <a href="http://pythonhosted.org/Flask-Classy/" rel="nofollow">flask-classy</a> does is create a temporary cache that it stores on the method, then it uses something else (the fact that Flask will register the classes using a <code>register</code> class method) to actually wraps the method.</p> <p>You can reuse this pattern, this time using a metaclass so that you can wrap the method at import time.</p> <pre><code>def route(rule, **options): """A decorator that is used to define custom routes for methods in FlaskView subclasses. The format is exactly the same as Flask's `@app.route` decorator. """ def decorator(f): # Put the rule cache on the method itself instead of globally if not hasattr(f, '_rule_cache') or f._rule_cache is None: f._rule_cache = {f.__name__: [(rule, options)]} elif not f.__name__ in f._rule_cache: f._rule_cache[f.__name__] = [(rule, options)] else: f._rule_cache[f.__name__].append((rule, options)) return f return decorator </code></pre> <p>On the actual class (you could do the same using a metaclass):</p> <pre><code>@classmethod def register(cls, app, route_base=None, subdomain=None, route_prefix=None, trailing_slash=None): for name, value in members: proxy = cls.make_proxy_method(name) route_name = cls.build_route_name(name) try: if hasattr(value, "_rule_cache") and name in value._rule_cache: for idx, cached_rule in enumerate(value._rule_cache[name]): # wrap the method here </code></pre> <p>Source: <a href="https://github.com/apiguy/flask-classy/blob/master/flask_classy.py" rel="nofollow">https://github.com/apiguy/flask-classy/blob/master/flask_classy.py</a></p>
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