🔒 testing for broken imports

[signal pike]

is there a reasonable python checker that checks imports - a broken import passes
py_compile, pyflakes, and pylance checks ...
this code has no warnings in visual studio, but crashes at runtime:

async def foo():
    from os import thing_that_doesnt_exist as dothing
    result = dothing()
    return result 
foo()

how could i check this code for correctness?

[arctic abyss]

@signal pike

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[surreal mural]

i'm pretty sure python itself would be able to report if that thing doesnt exist

!e

async def f():
from os import abc as d

[arctic abyss]

:warning: Your 3.12 eval job has completed with return code 0.

[No output]

[surreal mural]

what

ohhh

[signal pike]

yeah, this is the issue i'm dealing with ...

[surreal mural]

it's because the function isn't run

move the imports to the top of the file

[signal pike]

i want a compile time / code lint check, rather than exploding at runtime ...

[surreal mural]

ruff makes you do this by default fyi

[surreal mural]

move it to the top of the file and then pylance should report the issue

[signal pike]

!e

from os import abc as d

[arctic abyss]

:warning: Your 3.12 eval job has completed with return code 0.

[No output]

[surreal mural]

what

!e from sys import abracadabra as abc

[arctic abyss]

:x: Your 3.12 eval job has completed with return code 1.

001 | Traceback (most recent call last):
002 |   File "/home/main.py", line 1, in <module>
003 |     from sys import abracadabra as abc
004 | ImportError: cannot import name 'abracadabra' from 'sys' (unknown location)

[surreal mural]

weird how that doesnt do anything for os

!e from os import abracadabra

[arctic abyss]

:x: Your 3.12 eval job has completed with return code 1.

001 | Traceback (most recent call last):
002 |   File "/home/main.py", line 1, in <module>
003 |     from os import abracadabra
004 | ImportError: cannot import name 'abracadabra' from 'os' (/snekbin/python/3.12/lib/python3.12/os.py)

[surreal mural]

no it still does

!e from os import abc

[arctic abyss]

:warning: Your 3.12 eval job has completed with return code 0.

[No output]

[surreal mural]

!e from os import abc

print(abc)

[arctic abyss]

:white_check_mark: Your 3.12 eval job has completed with return code 0.

<module 'abc' (frozen)>

[surreal mural]

ohhh

thats this

!d abc

[arctic abyss]

abc

Source code: Lib/abc.py

This module provides the infrastructure for defining abstract base classes (ABCs) in Python, as outlined in PEP 3119; see the PEP for why this was added to Python. (See also PEP 3141 and the numbers module regarding a type hierarchy for numbers based on ABCs.)

The collections module has some concrete classes that derive from ABCs; these can, of course, be further derived. In addition, the collections.abc submodule has some ABCs that can be used to test whether a class or instance provides a particular interface, for example, if it is hashable or if it is a mapping...

Similar names: aiohttp.doc.abc

[signal pike]

!e from os import thing_that_doesnt_exist as theThing

print(theThing)

[arctic abyss]

:x: Your 3.12 eval job has completed with return code 1.

001 | Traceback (most recent call last):
002 |   File "/home/main.py", line 1, in <module>
003 |     from os import thing_that_doesnt_exist as theThing
004 | ImportError: cannot import name 'thing_that_doesnt_exist' from 'os' (/snekbin/python/3.12/lib/python3.12/os.py)

[surreal mural]

!e

def f():
from os import thing_that_doesnt_exist

f()

[signal pike]

fails at runtime, but how do you lint that?

[arctic abyss]

:x: Your 3.12 eval job has completed with return code 1.

001 | Traceback (most recent call last):
002 |   File "/home/main.py", line 4, in <module>
003 |     f()
004 |   File "/home/main.py", line 2, in f
005 |     from os import thing_that_doesnt_exist
006 | ImportError: cannot import name 'thing_that_doesnt_exist' from 'os' (/snekbin/python/3.12/lib/python3.12/os.py)

[surreal mural]

im not sure. im not currently at my laptop since it's 12:30, i should be asleep and i have an exam tomorrow

but this is quite strange

[signal pike]

no warnings in vscode

[surreal mural]

like i said earlier, does it lint at the top?

well clearly not

[surreal mural]

that is really strange

what's your pylance set to?

should be like off, basic, normal and strict

[signal pike]

not sure - how do i check in vscode?

aha - yes, that needed to be turned up 🙂

[arctic abyss]

Python help channel closed for inactivity

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