ctypes AttributeError on pip install

[AyanSinhaMahapatra]

Description

Please leave a brief description of the bug or feature request:

On python 3.8:

Traceback (most recent call last):
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py38/bin/scancode", line 5, in <module>
    from scancode.cli import scancode
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py38/lib/python3.8/site-packages/scancode/cli.py", line 113, in <module>
    plugin_classes, plugin_options = PluginManager.load_plugins()
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py38/lib/python3.8/site-packages/plugincode/__init__.py", line 199, in load_plugins
    mgr_setup = manager.setup()
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py38/lib/python3.8/site-packages/plugincode/__init__.py", line 223, in setup
    self.manager.load_setuptools_entrypoints(entrypoint)
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py38/lib/python3.8/site-packages/pluggy/_manager.py", line 287, in load_setuptools_entrypoints
    plugin = ep.load()
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py38/lib/python3.8/site-packages/importlib_metadata/__init__.py", line 210, in load
    module = import_module(match.group('module'))
  File "/usr/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py38/lib/python3.8/site-packages/summarycode/classify_plugin.py", line 16, in <module>
    from packagedcode import get_package_handler
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py38/lib/python3.8/site-packages/packagedcode/__init__.py", line 13, in <module>
    from packagedcode import about
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py38/lib/python3.8/site-packages/packagedcode/about.py", line 16, in <module>
    from packagedcode import models
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py38/lib/python3.8/site-packages/packagedcode/models.py", line 32, in <module>
    from typecode import contenttype
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py38/lib/python3.8/site-packages/typecode/__init__.py", line 21, in <module>
    from typecode.contenttype import get_type
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py38/lib/python3.8/site-packages/typecode/contenttype.py", line 32, in <module>
    from typecode import magic2
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py38/lib/python3.8/site-packages/typecode/magic2.py", line 378, in <module>
    libmagic = load_lib()
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py38/lib/python3.8/site-packages/typecode/magic2.py", line 193, in load_lib
    failover_lib = load_lib_failover()
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py38/lib/python3.8/site-packages/typecode/magic2.py", line 121, in load_lib_failover
    ctypes.util.find_library('magic')
AttributeError: module 'ctypes' has no attribute 'util'

On python 3.11:

Traceback (most recent call last):
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py311/bin/scancode", line 5, in <module>
    from scancode.cli import scancode
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py311/lib/python3.11/site-packages/scancode/cli.py", line 113, in <module>
    plugin_classes, plugin_options = PluginManager.load_plugins()
                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py311/lib/python3.11/site-packages/plugincode/__init__.py", line 199, in load_plugins
    mgr_setup = manager.setup()
                ^^^^^^^^^^^^^^^
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py311/lib/python3.11/site-packages/plugincode/__init__.py", line 223, in setup
    self.manager.load_setuptools_entrypoints(entrypoint)
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py311/lib/python3.11/site-packages/pluggy/_manager.py", line 287, in load_setuptools_entrypoints
    plugin = ep.load()
             ^^^^^^^^^
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py311/lib/python3.11/site-packages/importlib_metadata/__init__.py", line 210, in load
    module = import_module(match.group('module'))
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py311/lib/python3.11/site-packages/summarycode/classify_plugin.py", line 16, in <module>
    from packagedcode import get_package_handler
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py311/lib/python3.11/site-packages/packagedcode/__init__.py", line 13, in <module>
    from packagedcode import about
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py311/lib/python3.11/site-packages/packagedcode/about.py", line 16, in <module>
    from packagedcode import models
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py311/lib/python3.11/site-packages/packagedcode/models.py", line 32, in <module>
    from typecode import contenttype
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py311/lib/python3.11/site-packages/typecode/__init__.py", line 21, in <module>
    from typecode.contenttype import get_type
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py311/lib/python3.11/site-packages/typecode/contenttype.py", line 32, in <module>
    from typecode import magic2
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py311/lib/python3.11/site-packages/typecode/magic2.py", line 378, in <module>
    libmagic = load_lib()
               ^^^^^^^^^^
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py311/lib/python3.11/site-packages/typecode/magic2.py", line 193, in load_lib
    failover_lib = load_lib_failover()
                   ^^^^^^^^^^^^^^^^^^^
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py311/lib/python3.11/site-packages/typecode/magic2.py", line 121, in load_lib_failover
    ctypes.util.find_library('magic')
    ^^^^^^^^^^^
AttributeError: module 'ctypes' has no attribute 'util'

How To Reproduce

Tell us how to reproduce the issue.

python3.11 -m venv venvs/scancode-32.0.0-py311/
source venvs/scancode-32.0.0-py311/bin/activate
pip install scancode-toolkit
scancode -h

System configuration

For bug reports, it really helps us to know:

• What OS are you running on? (Windows/MacOS/Linux) ubuntu-20.04
• What version of scancode-toolkit was used to generate the scan file? v32.0.0
• What installation method was used to install/run scancode? (pip/source download/other) pip

Seems to be aboutcode-org/typecode#27 and aboutcode-org/typecode#32 is related to this, since same errors are referenced?

[AyanSinhaMahapatra]

This seems to be solved with https://github.com/nexB/typecode/releases/tag/v30.0.1 but we have a new error on running the same command.

/home/ayansinha/nexB/venvs/scancode-32.0.0-py311-new/lib/python3.11/site-packages/typecode/magic2.py:195: UserWarning: System libmagic found in typical location is used. Install instead a typecode-libmagic plugin for best support.
  warnings.warn(
Traceback (most recent call last):
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py311-new/bin/scancode", line 5, in <module>
    from scancode.cli import scancode
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py311-new/lib/python3.11/site-packages/scancode/cli.py", line 113, in <module>
    plugin_classes, plugin_options = PluginManager.load_plugins()
                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py311-new/lib/python3.11/site-packages/plugincode/__init__.py", line 199, in load_plugins
    mgr_setup = manager.setup()
                ^^^^^^^^^^^^^^^
  File "/home/ayansinha/nexB/venvs/scancode-32.0.0-py311-new/lib/python3.11/site-packages/plugincode/__init__.py", line 236, in setup
    raise PlugincodeError(
plugincode.PlugincodeError: Invalid plugin: 'pre_scan:classify': <class 'summarycode.classify_plugin.FileClassifier'> must extend <class 'plugincode.pre_scan.PreScanPlugin'>.

@jyang noticed that the setup.cfg in https://files.pythonhosted.org/packages/88/4b/79ca4c6f06c5b9ad1f5f601f1191e207fa05dcbccb2c4a46b381d3ad98af/scancode-toolkit-32.0.0.tar.gz is different from the one in the git checkout. Opened a new issue at #3408

[AyanSinhaMahapatra]

This is fixed, closing!