[Tutor] import issues

[dn]

On 10/01/24 12:01, Mats Wichmann wrote:
> On 1/9/24 15:29, dn via Tutor wrote:
>> On 10/01/24 07:06, James Hartley wrote:
>>>   I admit that I have not internalized how Python's import system 
>>> works yet.
>>> Given the following directory structure:
>>>
>>> +-project
>>>      |
>>>      +-src
>>>      |   |
>>>      |   +-__init__.py
>>>      |   +-foo.py
>>>      |
>>>      +-tests
>>>          |
>>>          +-test_foo.py
>>>
>>> Currently, __init__.py is empty.  What needs to be placed in __init__.py
>>
>> Nothing - it's not relevant to this discussion.
>>
>>
>>> and test_foo.py in order for pytest to execute all tests in test_foo.py?
>>> pytest is being executed while in the project directory.  With:
>>>
>>> from foo import Foo
>>>
>>> --or--
>>>
>>> from src.foo import Foo
>>>
>>> defined in test_foo.py, pytest reports "ModuleNotFoundError: No module
>>> named 'src'".
>>>
>>> Any and all comments would be appreciated.  Any links to online sources
>>> would also be appreciated. Thanks!
>>
>> I use the latter, except:
>>
>> - using PyCharm's auto-testing feature. However, 'translating' those 
>> commands back to manual-typing, would be something like:
>>
>> python -m pytest /path/project/tests/test_test_foo.py --no-header 
>> --no-summary -q
>>
>> - prepending "python -m"
>> which configures the sys.path to include current/project directory 
>> (and hence the "src.foo" relative-addressing) which likely accounts 
>> for the issues outlined (above)
>>
>>
>> Web.Refs:
>> Specifics: 
>> https://docs.pytest.org/en/7.4.x/explanation/pythonpath.html#pytest-vs-python-m-pytest
>> and the rest of the online-manual (although I have to say, even after 
>> years of use, I find it somewhat overwhelming)
>>
>> Somewhat easier is the 'book of words', Brian Okken's: 
>> https://www.amazon.com.au/Python-Testing-pytest-Effective-Scalable/dp/1680508601/ref=sr_1_1?keywords=brian+okken&qid=1704838720&sr=8-1
>> (disclaimer: there are other book-sellers. No commission claimed)
>>
>> Coursera on-line training: (amongst many 'Python' courses)
>> Testing and Debugging Python 
>> https://www.coursera.org/projects/testing-and-debugging-python
>> - is a $paid project approach
>> Possibly slightly off (your) topic is LearnQuest's 'TDD 
>> Specialisation': 
>> https://www.coursera.org/learn/test-driven-development-overview
>> (which I think can be "audited" for $free)
>> NB have not completed either, and thus can't comment on quality, nor 
>> degree of pytest-content.
> 
> Lotsa good stuff here, too:
> 
> https://www.obeythetestinggoat.com/


OK, now you've made me feel bad!

Having broadened the OP's scope, this book/web-site should indeed have 
been mentioned!

I met Harry at a London-PUG meeting. Wow, must be a solid 15 years back 
- started playing with pythonanywhere.com when they were still setting 
it up/converting from the idea of a Python-based 'better Excel'... 
(Harry has since moved-on to work on other things)

The testing-goat has a lot of grey in his beard these days. However, 
what other tome covers Python+testing+pytest?
[have a 'gathering' on Friday*, to talk about 'testing'. Thus, will be 
interested in any and all comments, advice, sources...]

IIRC the main project-example was web/Django, which some Python-folk may 
find unnecessarily complicated/unfamiliar.


* 1500 NZDT so not a particularly-friendly hour for folk in EUR/UK
https://www.meetup.com/nzpug-auckland/events/298338908/
part of our Vacation Exception Handlers gatherings (cf formal PUG-meetings)
NB it is summer, as well as the festive/holiday-period down-under.
https://danceswithmice.info/Python/2024/VacExcHndlrs.html.

-- 
Regards,
=dn