python - multithreaded urllib2 freezes on nose framework -

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i have python code uses nose_parameterized below:

from nose_parameterized import parameterized multiprocessing.pool import threadpool import urllib2  def make_http_call(url, req_type):     opener = urllib2.build_opener() # <=== line causes freeze     return 1  pool = threadpool(processes=4) results = [] urls = ['a', 'b', 'c', 'd'] url in urls:     results.append(pool.apply_async(make_http_call, (url, 'html'))) d = {'add': []} ind, res in enumerate(results):     d['add'].append((res.get(), 2+ind, 3+ind))  @parameterized(d['add']) def test_add(a, b, c):     assert a+b == c

this dummy version of code. basically, need load test parameters http request responses , since there lots of urls, want multithread them. add urllib2.build_opener, freezes using nose (but still works fine python) also, i've tried urllib2.urlopen; same problem. ideas whether there 'proper' (debuggable) way work around this?

you can use nose multiprocess built in plugin that, like:

from nose_parameterized import parameterized import urllib2  urls = ['http://www.google.com', 'http://www.yahoo.com']  @parameterized(urls) def test_add(url):     = urllib2.urlopen(url).read()      b = 2 + urls.index(url)     c = 3 + urls.index(url)     assert a+str(b) == str(c)

and run nosetests --processes=2. enables distribute test run among set of worker processes run tests in parallel intended. behind scenes, multiprocessing module used.


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