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Where did you put <code>pdb.set_trace()</code>...? This works for me: <pre><code>#!/usr/bin/python # -*- coding: utf-8 -*- import tornado.httpserver import tornado.ioloop import tornado.options import tornado.web import pdb from tornado.options import define, options define("port", default=8000, help="run on the given port", type=int) class IndexHandler(tornado.web.RequestHandler): def get(self): greeting = self.get_argument('greeting', 'Hello') reself.write(greeting + ', friendly user!') if __name__ == "__main__": tornado.options.parse_command_line() app = tornado.web.Application(handlers=[(r"/", IndexHandler)]) http_server = tornado.httpserver.HTTPServer(app) http_server.listen(options.port) pdb.set_trace() tornado.ioloop.IOLoop.instance().start() </code></pre> Session: <pre><code>$ python test.py > /home/mariusz/Dokumenty/Projekty/Testy/test.py(24)<module>() -> tornado.ioloop.IOLoop.instance().start() (Pdb) break 16 Breakpoint 1 at /home/mariusz/Dokumenty/Projekty/Testy/test.py:16 (Pdb) continue > /home/mariusz/Dokumenty/Projekty/Testy/test.py(16)get() -> self.write(greeting + ', friendly user!') (Pdb) step --Call-- > /usr/local/lib/python2.7/dist-packages/tornado/web.py(497)write() -> def write(self, chunk): (Pdb) step > /usr/local/lib/python2.7/dist-packages/tornado/web.py(512)write() -> if self._finished: (Pdb) step > /usr/local/lib/python2.7/dist-packages/tornado/web.py(516)write() -> if isinstance(chunk, dict): (Pdb) </code></pre> After putting <code>continue</code> in above code debugger stopped, because I had to poll <code>http://localhost:8000/</code> in browser to have <code>RequestHandler</code> function actually called.
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1. POSet break points in Tornado app
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1. USNykakin
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1. COI am actually using Foreman to run my Tornado app. I guess its Foreman which ignore the break points.
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Querying!

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