Develop Reference

Pycharm: ModuleNotFoundError: No module named 'distutils.cmd'

I'm trying to use opencv module with python.
I have Python3.10.
I installed the module and with the use of Python interpreter in the command line, writing "import cv2" it works fine.
Now, I want to use opencv inside PyCharm.
I went to "File->Settings->Project->Python Interpreter" and then I tried to add the module "opencv-python" but it returned:
"Error occurred when installing package 'opencv-python'. Details.."
and clicking on Details, this is the command output:
Error: Traceback (most recent call last):
File "/opt/pycharm-community-2022.3.1/plugins/python-ce/helpers/packaging_tool.py", line 73, in run_pip
runpy.run_module(module_name, run_name='__main__', alter_sys=True)
File "/usr/lib/python3.9/runpy.py", line 210, in run_module
return _run_module_code(code, init_globals, run_name, mod_spec)
File "/usr/lib/python3.9/runpy.py", line 97, in _run_module_code
_run_code(code, mod_globals, init_globals,
File "/usr/lib/python3.9/runpy.py", line 87, in _run_code
exec(code, run_globals)
File "/home/user/Progetti/SottoProgettiPython/RiconoscimentoFacciale/venv/lib/python3.9/site-packages/pip/__main__.py", line 29, in <module>
from pip._internal.cli.main import main as _main
File "/home/user/Progetti/SottoProgettiPython/RiconoscimentoFacciale/venv/lib/python3.9/site-packages/pip/_internal/cli/main.py", line 9, in <module>
from pip._internal.cli.autocompletion import autocomplete
File "/home/user/Progetti/SottoProgettiPython/RiconoscimentoFacciale/venv/lib/python3.9/site-packages/pip/_internal/cli/autocompletion.py", line 10, in <module>
from pip._internal.cli.main_parser import create_main_parser
File "/home/user/Progetti/SottoProgettiPython/RiconoscimentoFacciale/venv/lib/python3.9/site-packages/pip/_internal/cli/main_parser.py", line 9, in <module>
from pip._internal.build_env import get_runnable_pip
File "/home/user/Progetti/SottoProgettiPython/RiconoscimentoFacciale/venv/lib/python3.9/site-packages/pip/_internal/build_env.py", line 20, in <module>
from pip._internal.cli.spinners import open_spinner
File "/home/user/Progetti/SottoProgettiPython/RiconoscimentoFacciale/venv/lib/python3.9/site-packages/pip/_internal/cli/spinners.py", line 9, in <module>
from pip._internal.utils.logging import get_indentation
File "/home/user/Progetti/SottoProgettiPython/RiconoscimentoFacciale/venv/lib/python3.9/site-packages/pip/_internal/utils/logging.py", line 29, in <module>
from pip._internal.utils.misc import ensure_dir
File "/home/user/Progetti/SottoProgettiPython/RiconoscimentoFacciale/venv/lib/python3.9/site-packages/pip/_internal/utils/misc.py", line 42, in <module>
from pip._internal.locations import get_major_minor_version
File "/home/user/Progetti/SottoProgettiPython/RiconoscimentoFacciale/venv/lib/python3.9/site-packages/pip/_internal/locations/__init__.py", line 67, in <module>
from . import _distutils
File "/home/user/Progetti/SottoProgettiPython/RiconoscimentoFacciale/venv/lib/python3.9/site-packages/pip/_internal/locations/_distutils.py", line 20, in <module>
from distutils.cmd import Command as DistutilsCommand
ModuleNotFoundError: No module named 'distutils.cmd'
I didn't found any working solutions for the module distutils.
I tried to install and reinstall the module "python3.10-distutils" but it is already installed.
Someone knows how to solve the problem?
Thanks in advance,
Marco

Suddenly all virtual envs fail

I use vscode and I'm working with Jupyter in this particular example. Yesterday, I was doing my work fine. Today, my venv is broken, so I deleted and started again:
python -m venv venv
./venv/Scripts/Activate
Okay, so I have brand new venv now. So lets try updating pip:
python -m pip --upgrade pip
And I get this error:
Traceback (most recent call last):
File "C:\Users\jmarshall\AppData\Local\Programs\Python\Python38-32\lib\runpy.py", line 194, in _run_module_as_main
return _run_code(code, main_globals, None,
File "C:\Users\jmarshall\AppData\Local\Programs\Python\Python38-32\lib\runpy.py", line 87, in _run_code
exec(code, run_globals)
File "C:\Users\jmarshall\source\mdgattribution\venv\lib\site-packages\pip\__main__.py", line 16, in <module>
from pip._internal import main as _main # isort:skip # noqa
File "C:\Users\jmarshall\source\mdgattribution\venv\lib\site-packages\pip\_internal\__init__.py", line 19, in <module>
from pip._vendor.urllib3.exceptions import DependencyWarning
File "C:\Users\jmarshall\source\mdgattribution\venv\lib\site-packages\pip\_vendor\urllib3\__init__.py", line 7, in <module>
from .connectionpool import (
File "C:\Users\jmarshall\source\mdgattribution\venv\lib\site-packages\pip\_vendor\urllib3\connectionpool.py", line 11, in <module>
from .exceptions import (
File "C:\Users\jmarshall\source\mdgattribution\venv\lib\site-packages\pip\_vendor\urllib3\exceptions.py", line 2, in <module>
from .packages.six.moves.http_client import (
File "C:\Users\jmarshall\source\mdgattribution\venv\lib\site-packages\pip\_vendor\urllib3\packages\six.py", line 203, in load_module
mod = mod._resolve()
File "C:\Users\jmarshall\source\mdgattribution\venv\lib\site-packages\pip\_vendor\urllib3\packages\six.py", line 115, in _resolve
return _import_module(self.mod)
File "C:\Users\jmarshall\source\mdgattribution\venv\lib\site-packages\pip\_vendor\urllib3\packages\six.py", line 82, in _import_module
__import__(name)
File "C:\Users\jmarshall\AppData\Local\Programs\Python\Python38-32\lib\http\client.py", line 71, in <module>
import email.parser
ModuleNotFoundError: No module named 'email.parser'
Okay, lets try to ignore this an set up jupyter.
pip install wheel
pip install juypterlab
pip install ipykernel
Then when I try running a cell in that notebook in VSCode I get this error:
Kernel died (code: 1). ModuleNotFoundError: No module named 'email.parser',
Traceback (most recent call last):
File "C:\Users\jmarshall\AppData\Local\Programs\Python\Python38-32\lib\runpy.py", line 194, in _run_module_as_main
return _run_code(code, main_globals, None,
File "C:\Users\jmarshall\AppData\Local\Programs\Python\Python38-32\lib\runpy.py", line 87, in _run_code
exec(code, run_globals)
File "c:\Users\jmarshall\source\mdgattribution\venv\lib\site-packages\ipykernel_launcher.py", line 15, in <module>
from ipykernel import kernelapp as app
File "c:\Users\jmarshall\source\mdgattribution\venv\lib\site-packages\ipykernel\kernelapp.py", line 22, in <module>
from IPython.core.application import (
File "c:\Users\jmarshall\source\mdgattribution\venv\lib\site-packages\IPython\__init__.py", line 56, in <module>
from .terminal.embed import embed
File "c:\Users\jmarshall\source\mdgattribution\venv\lib\site-packages\IPython\terminal\embed.py", line 17, in <module>
from IPython.terminal.ipapp import load_default_config
File "c:\Users\jmarshall\source\mdgattribution\venv\lib\site-packages\IPython\terminal\ipapp.py", line 28, in <module>
from IPython.core.magics import (
File "c:\Users\jmarshall\source\mdgattribution\venv\lib\site-packages\IPython\core\magics\__init__.py", line 18, in <module>
from .code import CodeMagics, MacroToEdit
File "c:\Users\jmarshall\source\mdgattribution\venv\lib\site-packages\IPython\core\magics\code.py", line 23, in <module>
from urllib.request import Request, urlopen
File "C:\Users\jmarshall\AppData\Local\Programs\Python\Python38-32\lib\urllib\request.py", line 88, in <module>
import http.client
File "C:\Users\jmarshall\AppData\Local\Programs\Python\Python38-32\lib\http\client.py", line 71, in <module>
import email.parser
ModuleNotFoundError: No module named 'email.parser'
What the heck is going on here?
Edit1
I've just proven it will error on the 3.8 global interpreter instance, even though I have other notebooks working on that. I've added a screenshot of the project.

You created a package named email, you need to rename it to some other names.

Unable to access Jupyter Notebook. ImportError: DLL load failed: %1 is not a valid Win32 application

I am trying to open Jupyter Notebook in my Windows10 system.
I had python2.7 initially in my machine and I have installed python 3.8.
I have also installed Jupyter Notebook using pip install Jupyter
The installation has been successful, but when I try to access Jupyter Notebook, I get this error:
C:\Users\abhishek murahari>jupyter notebook
Traceback (most recent call last):
File "c:\python27\lib\runpy.py", line 174, in _run_module_as_main
"__main__", fname, loader, pkg_name)
File "c:\python27\lib\runpy.py", line 72, in _run_code
exec code in run_globals
File "C:\Python27\Scripts\jupyter-notebook.EXE\__main__.py", line 5, in <module>
File "c:\python27\lib\site-packages\notebook\notebookapp.py", line 47, in <module>
from zmq.eventloop import ioloop
File "c:\python27\lib\site-packages\zmq\__init__.py", line 47, in <module>
from zmq import backend
File "c:\python27\lib\site-packages\zmq\backend\__init__.py", line 40, in <module>
reraise(*exc_info)
File "c:\python27\lib\site-packages\zmq\backend\__init__.py", line 27, in <module>
_ns = select_backend(first)
File "c:\python27\lib\site-packages\zmq\backend\select.py", line 28, in select_backend
mod = __import__(name, fromlist=public_api)
File "c:\python27\lib\site-packages\zmq\backend\cython\__init__.py", line 6, in <module>
from . import (constants, error, message, context,
ImportError: DLL load failed: %1 is not a valid Win32 application.
Please help me with a solution.

Please check if the python version you are using is also 32 bit. If not then that could be the issue. You would be using a 64 bit python version.

Problems upgrading Ipython (prompt_toolkit incompatibilities)

Trying to open a jupyter notebook file (.ipynb file)
with this command ipython notebook filename.ipynb then I am getting Below Error while using ipython..
Traceback (most recent call last):
File "c:\python\lib\runpy.py", line 193, in _run_module_as_main
"__main__", mod_spec)
File "c:\python\lib\runpy.py", line 85, in _run_code
exec(code, run_globals)
File "C:\Python\Scripts\ipython.exe\__main__.py", line 5, in <module>
File "c:\python\lib\site-packages\IPython\__init__.py", line 55, in <module>
from .terminal.embed import embed
File "c:\python\lib\site-packages\IPython\terminal\embed.py", line 16, in
<module>
from IPython.terminal.interactiveshell import TerminalInteractiveShell
File "c:\python\lib\site-packages\IPython\terminal\interactiveshell.py",
line 18, in <module>
from prompt_toolkit.enums import DEFAULT_BUFFER, EditingMode
ModuleNotFoundError: No module named 'prompt_toolkit'

Just got the same problem.
The solution for me was to pip uninstall prompt-toolkit and pip install prompt-toolkit. This uninstalled v1.0.5 and installed v2.0.4.

Lost sqlite3 module from python after OSX Mavericks

After installing OS X Mavericks, I have been having issues running django's server:
(rango_tutorial)christohersmbp2:tango_with_django_project christopherspears$ python manage.py runserver
Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/site-packages/django/core/management/__init__.py", line 399, in execute_from_command_line
utility.execute()
File "/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/site-packages/django/core/management/__init__.py", line 392, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/site-packages/django/core/management/base.py", line 242, in run_from_argv
self.execute(*args, **options.__dict__)
File "/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/site-packages/django/core/management/base.py", line 280, in execute
translation.activate('en-us')
File "/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/site-packages/django/utils/translation/__init__.py", line 130, in activate
return _trans.activate(language)
File "/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/site-packages/django/utils/translation/trans_real.py", line 188, in activate
_active.value = translation(language)
File "/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/site-packages/django/utils/translation/trans_real.py", line 177, in translation
default_translation = _fetch(settings.LANGUAGE_CODE)
File "/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/site-packages/django/utils/translation/trans_real.py", line 159, in _fetch
app = import_module(appname)
File "/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/site-packages/django/utils/importlib.py", line 40, in import_module
__import__(name)
File "/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/site-packages/django/contrib/admin/__init__.py", line 6, in <module>
from django.contrib.admin.sites import AdminSite, site
File "/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/site-packages/django/contrib/admin/sites.py", line 4, in <module>
from django.contrib.admin.forms import AdminAuthenticationForm
File "/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/site-packages/django/contrib/admin/forms.py", line 6, in <module>
from django.contrib.auth.forms import AuthenticationForm
File "/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/site-packages/django/contrib/auth/forms.py", line 17, in <module>
from django.contrib.auth.models import User
File "/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/site-packages/django/contrib/auth/models.py", line 48, in <module>
class Permission(models.Model):
File "/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/site-packages/django/db/models/base.py", line 96, in __new__
new_class.add_to_class('_meta', Options(meta, **kwargs))
File "/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/site-packages/django/db/models/base.py", line 264, in add_to_class
value.contribute_to_class(cls, name)
File "/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/site-packages/django/db/models/options.py", line 124, in contribute_to_class
self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
File "/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/site-packages/django/db/__init__.py", line 34, in __getattr__
return getattr(connections[DEFAULT_DB_ALIAS], item)
File "/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/site-packages/django/db/utils.py", line 198, in __getitem__
backend = load_backend(db['ENGINE'])
File "/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/site-packages/django/db/utils.py", line 113, in load_backend
return import_module('%s.base' % backend_name)
File "/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/site-packages/django/utils/importlib.py", line 40, in import_module
__import__(name)
File "/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/site-packages/django/db/backends/sqlite3/base.py", line 35, in <module>
raise ImproperlyConfigured("Error loading either pysqlite2 or sqlite3 modules (tried in that order): %s" % exc)
django.core.exceptions.ImproperlyConfigured: Error loading either pysqlite2 or sqlite3 modules (tried in that order): dlopen(/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/lib-dynload/_sqlite3.so, 2): Symbol not found: _sqlite3_enable_load_extension
Referenced from: /Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/lib-dynload/_sqlite3.so
Expected in: /usr/lib/libsqlite3.dylib
in /Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/lib-dynload/_sqlite3.so
I think the issue is that the sqlite3 module has gone missing for some reason:
(rango_tutorial)christohersmbp2:tango_with_django_project christopherspears$ python
Python 2.7.5 (default, Dec 31 2013, 11:46:08)
[GCC 4.2.1 Compatible Apple LLVM 4.2 (clang-425.0.28)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import sqlite3
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sqlite3/__init__.py", line 24, in <module>
from dbapi2 import *
File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sqlite3/dbapi2.py", line 27, in <module>
from _sqlite3 import *
ImportError: dlopen(/Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/lib-dynload/_sqlite3.so, 2): Symbol not found: _sqlite3_enable_load_extension
Referenced from: /Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/lib-dynload/_sqlite3.so
Expected in: /usr/lib/libsqlite3.dylib
in /Users/christopherspears/.virtualenvs/rango_tutorial/lib/python2.7/lib-dynload/_sqlite3.so
I'm not sure what is causing this. Isn't the sqlite3 module normally just part of Python?

Updating OS X is notorious for messing up all sorts of Developer Tools.
What is your output when you type which sqlite3? How about other developer tools like which gcc? If they are missing you may need to reinstall Xcode. I know many users had to reinstall XCode after updating to Mavericks.
Here's the link for more information: https://developer.apple.com/xcode/

Uninstalling and reinstalling python with brew seemed to help with the earlier problem. Of course now, python is broken in that virtual environment:
(rango_tutorial)christohersmbp2:tango_with_django_project christopherspears$ python manage.py runserver
dyld: Library not loaded: #executable_path/../.Python
Referenced from: /Users/christopherspears/.virtualenvs/rango_tutorial/bin/python
Reason: image not found
Trace/BPT trap: 5
(rango_tutorial)christohersmbp2:tango_with_django_project christopherspears$ python
dyld: Library not loaded: #executable_path/../.Python
Referenced from: /Users/christopherspears/.virtualenvs/rango_tutorial/bin/python
Reason: image not found
Trace/BPT trap: 5