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Get a filtered list of files in a directory

...ls.py ./apps/diaries/actions.py ./apps/diaries/querysets.py ./apps/library/tests/test_forms.py ./apps/library/migrations/0001_initial.py ./apps/polls/views.py ./apps/polls/formsets.py ./apps/polls/reports.py ./apps/polls/admin.py Solution 3 - use "pathlib" # lookup in current dir path_ = pathlib....
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What is __init__.py for?

...was required under Python 2.X and is still required under Python 2.7.12 (I tested it) but it is no longer required from (allegedly) Python 3.3 onwards, and is not required under Python 3.4.3 (I tested it). See stackoverflow.com/questions/37139786 for more details. – Rob_before...
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Abort makefile if variable not set

...abs must precede these lines. Generic solution In case you're going to test many variables, it's worth defining an auxiliary function for that: # Check that given variables are set and all have non-empty values, # die with an error otherwise. # # Params: # 1. Variable name(s) to test. # 2. ...
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What does the PHP error message “Notice: Use of undefined constant” mean?

... <?php ${test}="test information"; echo $test; ?> Notice: Use of undefined constant test - assumed 'test' in D:\xampp\htdocs\sp\test\envoirnmentVariables.php on line 3 test information ...
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Unit testing private methods in C#

Visual Studio allows unit testing of private methods via an automatically generated accessor class. I have written a test of a private method that compiles successfully, but it fails at runtime. A fairly minimal version of the code and the test is: ...
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Asserting successive calls to a mock method

...ut they must all appear in mock_calls. Example: >>> from unittest.mock import call, Mock >>> mock = Mock(return_value=None) >>> mock(1) >>> mock(2) >>> mock(3) >>> mock(4) >>> calls = [call(2), call(3)] >>> mock.assert_has_...
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Adding information to an exception?

...at %s' % arg1) bar('arg1') Traceback (most recent call last): File "test.py", line 13, in <module> bar('arg1') File "test.py", line 11, in bar raise type(e)(e.message + ' happens at %s' % arg1) IOError: Stuff happens at arg1 Update 1 Here's a slight modification that preser...
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Is this object-lifetime-extending-closure a C# compiler bug?

...Program { static void Main(string[] args) { } static void Test(double arg) { } class Foo { private Action _field; public void InstanceMethod() { var capturedVariable = Math.Pow(42, 1); _field = () => Test(capture...
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What is the worst gotcha in C# or .NET? [closed]

... nasty situations like this: using System; using System.Threading; class Test { static void Main() { for (int i=0; i < 10; i++) { ThreadStart ts = delegate { Console.WriteLine(i); }; new Thread(ts).Start(); } } } What will that print...
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How to unit test a Node.js module that requires other modules and how to mock the global require fun

...ake care of overriding the global require inside your module while you are testing it. This means you need no changes to your code in order to inject mocks for required modules. Proxyquire has a very simple api which allows resolving the module you are trying to test and pass along mocks/stubs for...