nosetests is capturing the output of my print statements. How to circumvent this?

Question

When I type

$ nosetests -v mytest.py

all my print outputs are captured when all tests pass. I want to see print outputs even everything passes.

So what I'm doing is to force an assertion error to see the output, like this.

class MyTest(TestCase):

    def setUp(self):
        self.debug = False

    def test_0(self):
        a = .... # construct an instance of something
        # ... some tests statements
        print a.dump()
        if self.debug:
            eq_(0,1)

It feels so hackish, there must be a better way. Enlighten me please.

Dottydoty

Any idea how to do it programatically? – Doralynn

Answer 1

Either:

$ nosetests --nocapture mytest.py

Or:

$ NOSE_NOCAPTURE=1 nosetests mytests.py

(it can also be specified in the nose.cfg file, see nosetests --help)

Dentilabial

Thanks for the useful answer. I also found it helpful to know I could pass this argument into nose.main() as described in the post: #7071001 – Fachan

In case anyone want to see the source: nose.readthedocs.org/en/latest/plugins/capture.html – Campos

The short version of this command is nosetests -s. For other standard options, see either the -h help or the basic usage help page. – Elaterite

python3.5 -m "nose" --nocapture – Antiperistalsis

doesn't work for me, even with this option my print statements aren't printed when the tests pass – Tetragram

Answer 2

Use

--nologcapture 

it worked for me

Strachan

Answer 3

This was added recently to nose instead of --nocapture do this:

nosetests -s

Mota

This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post. – Whoredom

@BhargavRao "do this nosetests -s" answers the question (albeit, without the littlest regard for grammar). i'm not sure why you're objecting. – Forestaysail

Note that -s is the single letter abbreviation of the --nocapture flag as per the documentation. – Creedon

Answer 4

In order to integrate with http://travis-ci.org I have put this into .travis.yml:

script:  "python setup.py nosetests -s"

---

where setup.py contains:

setup(
    ...
    tests_require=['nose>=1.0'],
    test_suite='nose.collector',
)

Doralynn

Answer 5

Try this,

nosetests -v 2 -s yourtest

Flags expect order.

Reinert