Incompatibility with newest "importlib_resources" backport of "importlib.resources"

Description

First off, thank you for all your hard work 😃

I have found that a --onefile / --standalone application using the package jsonschema no longer works, since jsonschema v4.x.x.

I have narrowed it down to the jsonschema._utils.load_schema function, which appears to have changed from using pkgutil to importlib.resources / importlib_resources in its v3 -> v4 update. This seems to have broken its functionality with Nuitka.

In jsonschema 3.2.0 (working), the load_schema function used pkgutil

def load_schema(name):
    """
    Load a schema from ./schemas/``name``.json and return it.
    """

    data = pkgutil.get_data("jsonschema", "schemas/{0}.json".format(name))
    return json.loads(data.decode("utf-8"))

In jsonschema 4.2.1 (no longer working), it appears the load_schema function now uses importlib_resources

if sys.version_info >= (3, 9):  # pragma: no cover
    import importlib.resources as resources
else:  # pragma: no cover
    import importlib_resources as resources

...

def load_schema(name):
    """
    Load a schema from ./schemas/``name``.json and return it.
    """

    path = resources.files(__package__).joinpath(f"schemas/{name}.json")
    data = path.read_text(encoding="utf-8")
    return json.loads(data)

Error Logs

$ ./example

Traceback (most recent call last):
  File "/tmp/.mount_examplWYktsX/example.py", line 1, in <module>
    import jsonschema
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "/tmp/.mount_examplWYktsX/jsonschema/__init__.py", line 29, in <module jsonschema>
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "/tmp/.mount_examplWYktsX/jsonschema/validators.py", line 349, in <module jsonschema.validators>
  File "/tmp/.mount_examplWYktsX/jsonschema/_utils.py", line 61, in load_schema
  File "/tmp/.mount_examplWYktsX/importlib_resources/abc.py", line 73, in read_text
  File "/tmp/.mount_examplWYktsX/importlib_resources/_adapters.py", line 141, in open
FileNotFoundError: Can't open orphan path

Nuitka Version:

Tried on both latest version, and development branch version.

• v0.6.17.6
• develop branch (v0.6.18rc7)

Operating System

• Ubuntu 20.04
• x86_64
• Linux 5.8.0-59-generic

Installation Method:

• pip (poetry with virtual environment and pyproject.toml

Example

example.py

import jsonschema
print(jsonschema)

pyproject.toml

[tool.poetry]
name = "example"
version = "0.1.0"
description = ""
authors = ["..."]

[tool.poetry.dependencies]
python = "^3.8"
jsonschema = "^4.2.1"
Nuitka = "^0.6.17"

[tool.poetry.dev-dependencies]

[build-system]
requires = ["poetry-core>=1.0.0"]
build-backend = "poetry.core.masonry.api"

nuitka.sh

#!/bin/bash
python3 -m nuitka  \
    example.py     \
    -o example     \
    --onefile

[kayhayen]

Part of the hotfix indeed. Thanks for your report.

[kayhayen]

It seems importlib_resources is supposed to be working as of 0.6.1 which is a long time away, but maybe it is the one that changed. And I also couldn’t reproduce this with 3.9 and only with 3.8, which is using that backport.