Mailman 3 February 2012 - Twisted

[Twisted-Python] Running Twisted tests with testtools
by Jonathan Lange 10 Feb '12

10 Feb '12

Hello, I'm the nominal maintainer of Trial. I'm also an active maintainer of testtools[1]. testtools is, roughly speaking, a base TestCase that works across a bunch of Pythons and has a few nice features[2]. I started to prefer it over Twisted's TestCase some time ago, and now use it pretty consistently, even for my Twisted code. testtools has a way of letting you run tests within the Twisted reactor, without needing to use a particular base class. For example:: class MyTests(TestCase): run_tests_with = AsynchronousDeferredRunTest def test_foo(self): ... return some_deferred Or:: class MyTests(TestCase): def test_ordinary_thing(self): ... @run_test_with(AsynchronousDeferredRunTest) def test_twisted_thing(self): ... return some_deferred It doesn't behave exactly the way Trial does. Freed from backwards compatibility constraints, I tightened up the implementation quite a bit. There are options to make it emulate Trial's behaviour[3]. The documentation says that it's "highly experimental". This is not strictly true any more, as it has been used in numerous projects and has been found to be quite robust. The key source code is at:: http://bazaar.launchpad.net/~testtools-committers/testtools/trunk/view/head… http://bazaar.launchpad.net/~testtools-committers/testtools/trunk/view/head… And you can get the code from PyPI or Launchpad[4]. testtools has had this feature for some time now. It's past time that I officially informed the Twisted community about it. That's the main reason for this email. In my ideal world, Twisted's TestCase would inherit from testtools's TestCase and would continue to provide the same API it does today. This might not be everyone else's ideal though, and the path from here to there is unclear to me. I welcome your thoughts. cheers, jml [1] http://testtools.rtfd.org ; http://pypi.python.org/pypi/testtools [2] http://testtools.readthedocs.org/en/latest/overview.html [3] http://testtools.readthedocs.org/en/latest/for-test-authors.html#twisted-su… [4] bzr branch lp:testtools

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[Twisted-Python] Twisted in the Google Summer of Code?
by Itamar Turner-Trauring 10 Feb '12

10 Feb '12

Sign up is sometime soon, and before considering this it'd be good to know we'd be able to find mentors to help the students with their projects. Would any developers working on Twisted be interested in being mentors for a student over the summer? -Itamar

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[Twisted-Python] How to Control Twisted Program through CLI
by Peng Xiao -X (penxiao - Digital China at Cisco) 08 Feb '12

08 Feb '12

Hi experts, I have one twisted program, and it used to connected some servers through reactor.connectTCP(), And now, when the program is running, I want to add another connection or disconnect one connection already has through reactor.connectTCP(), how can I do that? Best Regards, Xiao Peng(肖鹏)

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[Twisted-Python] safe_str is not safe
by Wolfgang Rohdewald 06 Feb '12

06 Feb '12

after patching CopyableFailure as written, the stack trace now ends with the following lines. The correct exception message is still not shown. It contains unicode chars which reflect.py/safe_str cannot handle. File "/hdd/pub/src/gitgames/kajongg/src/scoringengine.py", line 170, in initRuleset raise Exception(m18n('ruleset "%1" not found', self.name)) exceptions.Exception: <Exception instance at 0x30e8b48 with str error: 'Traceback (most recent call last):\n File "/usr/local/lib/python2.7/dist- packages/Twisted-11.0.0-py2.7-linux-x86_64.egg/twisted/python/reflect.py", line 546, in _safeFormat\n return formatter(o)\nUnicodeEncodeError: \'ascii\' codec can\'t encode character u\'\\u201e\' in position 10: ordinal not in range(128)\n'> Unhandled error in Deferred: after replacing safe_str by safe_repr in twisted/python/failure.py, I finally get a meaningful printout: File "/hdd/pub/src/gitgames/kajongg/src/scoringengine.py", line 170, in initRuleset raise Exception(m18n('ruleset "%1" not found', self.name)) exceptions.Exception: Exception(u'Regelsatz \u201e55a8a17e29a1a087cc8df9cedb5590cd\u201c nicht gefunden',) Unhandled error in Deferred: of course a correct encoding would be even better... my patch: --- failure.org 2012-02-06 22:22:46.395065076 +0100 +++ failure.py 2012-02-06 22:22:51.259064816 +0100 @@ -472,7 +472,7 @@ """Get a string of the exception which caused this Failure.""" if isinstance(self.value, Failure): return self.value.getErrorMessage() - return reflect.safe_str(self.value) + return reflect.safe_repr(self.value) def getBriefTraceback(self): io = StringIO() @@ -517,7 +517,7 @@ w("%s: %s: %s\n" % ( hasFrames, reflect.safe_str(self.type), - reflect.safe_str(self.value))) + reflect.safe_repr(self.value))) else: w( 'Traceback (most recent call last):\n') @@ -542,7 +542,7 @@ w(self.type + "\n") else: w("%s: %s\n" % (reflect.qual(self.type), - reflect.safe_str(self.value))) + reflect.safe_repr(self.value))) # chaining if isinstance(self.value, Failure): # TODO: indentation for chained failures? -- Wolfgang

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[Twisted-Python] Weekly Bug Summary
by exarkun＠twistedmatrix.com 05 Feb '12

05 Feb '12

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[Twisted-Python] regarding #5412
by moses dsouza 04 Feb '12

04 Feb '12

Hi Is this #5412 valid ? I ask because there aren't any comments against this bug. I'll provide a patch on confirmation. regards moijes12

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[Twisted-Python] help me on startService ( service.Service )
by 月忧茗 04 Feb '12

04 Feb '12

Hi, all I'm a new guy for twisted, I just study the example of finger14.tac at this page : http://twistedmatrix.com/documents/current/core/howto/tutorial/protocol.html But, *startService* not called when program running. Please help, thanks. Code like bellow: class FingerService(service.Service): ... def startService(self): print 'start service' self.test_call() service.Service.startService(self) Noting output ,and test_call() not called.

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[Twisted-Python] February Twisted Sprint
by Tenth 01 Feb '12

01 Feb '12

Itamar has generously offered to host this month's Boston Twisted Sprint! Thus it will be happening at his place, near Porter Square, on Saturday, February 11th, from 1:00 PM to 9:00 PM. An evite has gone out to the usual suspects, but if you'd like to be added (or removed from) that list, or would like more information about this or other Boston Sprints, let me know! Thanks, - Dave

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