Develop Reference

Hydrogen not running python 3.8

For several months I ran anaconda, my default python interpreter, and hence Hydrogen on Python 3.7.6 via Atom. Recently I updated my anaconda to 3.8.2, and immediately, my Hydrogen began showing this error.
Python 3
Traceback (most recent call last): File "C:\ProgramData\Anaconda3\lib\runpy.py", line 193, in _run_module_as_main return _run_code(code, main_globals, None, File "C:\ProgramData\Anaconda3\lib\runpy.py", line 86, in _run_code exec(code, run_globals) File "C:\ProgramData\Anaconda3\lib\site-packages\ipykernel_launcher.py", line 15, in from ipykernel import kernelapp as app File "C:\ProgramData\Anaconda3\lib\site-packages\ipykernel__init__.py", line 2, in from .connect import File "C:\ProgramData\Anaconda3\lib\site-packages\ipykernel\connect.py", line 18, in import jupyter_client File "C:\ProgramData\Anaconda3\lib\site-packages\jupyter_client__init__.py", line 4, in from .connect import File "C:\ProgramData\Anaconda3\lib\site-packages\jupyter_client\connect.py", line 24, in import zmq File "C:\ProgramData\Anaconda3\lib\site-packages\zmq__init__.py", line 47, in from zmq import backend File "C:\ProgramData\Anaconda3\lib\site-packages\zmq\backend__init__.py", line 40, in reraise(*exc_info) File "C:\ProgramData\Anaconda3\lib\site-packages\zmq\utils\sixcerpt.py", line 34, in reraise raise value File "C:\ProgramData\Anaconda3\lib\site-packages\zmq\backend__init__.py", line 27, in _ns = select_backend(first) File "C:\ProgramData\Anaconda3\lib\site-packages\zmq\backend\select.py", line 28, in select_backend mod = import(name, fromlist=public_api) File "C:\ProgramData\Anaconda3\lib\site-packages\zmq\backend\cython__init__.py", line 6, in from . import (constants, error, message, context, ImportError: cannot import name 'constants' from partially initialized module 'zmq.backend.cython' (most likely due to a circular import) (C:\ProgramData\Anaconda3\lib\site-packages\zmq\backend\cython__init__.py)
When I run python 3.8 code without Hydrogen, it still works, proving the error is Hydrogens
import sys
print(sys.version)
outputs: 3.8.2 (default, Mar 25 2020, 08:56:29) [MSC v.1916 64 bit (AMD64)]

Nanomsg import error

I'm having problems using NanoMsg. I was using default sockets before but then someone pointed out that this was a bad idea. So I searched to get a better package and found NanoMsg. When I tried importing I got this error:
Python 3.5.2 (v3.5.2:4def2a2901a5, Jun 25 2016, 22:01:18) [MSC v.1900 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>>
================= RESTART: C:\Users\user\Desktop\Website.py =================
=============================== RESTART: Shell ===============================
>>> import nanomsg
Warning (from warnings module):
File "C:\Users\user\lib\site-packages\nanomsg_wrappers\__init__.py", line 22
"%s, performance may be affected!") % (default,))
UserWarning: Could not load the default wrapper for your platform: cpy, performance may be affected!
Traceback (most recent call last):
File "<pyshell#0>", line 1, in <module>
import nanomsg
File "C:\Users\user\lib\site-packages\nanomsg\__init__.py", line 7, in <module>
from . import wrapper
File "C:\Users\user\lib\site-packages\nanomsg\wrapper.py", line 4, in <module>
_wrapper = _load_wrapper()
File "C:\Users\user\lib\site-packages\nanomsg_wrappers\__init__.py", line 23, in load_wrapper
return importlib.import_module('_nanomsg_ctypes')
File "C:\Users\user\lib\importlib\__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "C:\Users\user\lib\site-packages\_nanomsg_ctypes\__init__.py", line 10, in <module>
_lib = ctypes.windll.nanomsg
File "C:\Users\user\lib\ctypes\__init__.py", line 417, in __getattr__
dll = self._dlltype(name)
File "C:\Users\user\lib\ctypes\__init__.py", line 347, in __init__
self._handle = _dlopen(self._name, mode)
OSError: [WinError 126] The specified module could not be found
>>>
Any solutions?

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

py2exe cannot find a module

I have a Python app that works fine. Now I use py2exe to create a windows executable of this app, however the resulting exe fails with complain that it lacks the configobj module
Traceback (most recent call last):
File "file1.py", line 1, in <module>
File "file2.pyc", line 10, in <module>
ImportError: No module named configobj
Line 10 in file2.py is merely from configobj import ConfigObj
I tried to explicitly add configobj to the list of packed modules by specifying -i configobj argument, but then the py2exe run fails with the similar error:
running py2exe
creating C:\path\to\proj\dist
*** generate typelib stubs ***
collected 0 stubs from 1 type libraries
*** searching for required modules ***
Traceback (most recent call last):
File " C:\path\to\proj\py2exe_setup.py", line 18, in <module>
options = {"py2exe": {"typelibs": [('{00020813-0000-0000-C000-000000000046}', 0, 1, 5)]}},
File "C:\Python26\lib\distutils\core.py", line 152, in setup
dist.run_commands()
File "C:\Python26\lib\distutils\dist.py", line 975, in run_commands
self.run_command(cmd)
File "C:\Python26\lib\distutils\dist.py", line 995, in run_command
cmd_obj.run()
File "C:\Python26\lib\site-packages\py2exe\build_exe.py", line 243, in run
self._run()
File "C:\Python26\lib\site-packages\py2exe\build_exe.py", line 296, in _run
self.find_needed_modules(mf, required_files, required_modules)
File "C:\Python26\lib\site-packages\py2exe\build_exe.py", line 1297, in find_needed_modules
mf.import_hook(mod)
File "C:\Python26\lib\site-packages\py2exe\mf.py", line 719, in import_hook
return Base.import_hook(self,name,caller,fromlist,level)
File "C:\Python26\lib\site-packages\py2exe\mf.py", line 136, in import_hook
q, tail = self.find_head_package(parent, name)
File "C:\Python26\lib\site-packages\py2exe\mf.py", line 204, in find_head_package
raise ImportError, "No module named " + qname
ImportError: No module named configobj
The configobj module is installed on my computer in its default location
Python 2.6.5 (r265:79096, Mar 19 2010, 21:48:26) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import configobj
>>> print configobj.__version__
4.7.2
>>> import py2exe
C:\Python26\lib\site-packages\py2exe\build_exe.py:16: DeprecationWarning: the sets module is deprecated
import sets
>>> print py2exe.__version__
0.6.9
What am I doing wrong ?

Reinstalling configobj from source fixed the problem. Damn me if I know why

When running Celery with Django's manage.py command, it returns a strange error

When I run the following command, it produces the following error:
% python manage.py celeryd -l INFO ~/Workspace/django-projects/project/src
Traceback (most recent call last):
File "manage.py", line 11, in <module>
execute_manager(settings)
File "/home/damon/Workspace/django-projects/project/env/lib/python2.6/site-packages/django/core/management/__init__.py", line 438, in execute_manager
utility.execute()
File "/home/damon/Workspace/django-projects/project/env/lib/python2.6/site-packages/django/core/management/__init__.py", line 379, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/damon/Workspace/django-projects/project/env/lib/python2.6/site-packages/django/core/management/__init__.py", line 261, in fetch_command
klass = load_command_class(app_name, subcommand)
File "/home/damon/Workspace/django-projects/project/env/lib/python2.6/site-packages/django/core/management/__init__.py", line 67, in load_command_class
module = import_module('%s.management.commands.%s' % (app_name, name))
File "/home/damon/Workspace/django-projects/project/env/lib/python2.6/site-packages/django/utils/importlib.py", line 35, in import_module
__import__(name)
File "/home/damon/Workspace/django-projects/project/env/lib/python2.6/site-packages/djcelery/management/commands/celeryd.py", line 13, in <module>
class Command(CeleryCommand):
File "/home/damon/Workspace/django-projects/project/env/lib/python2.6/site-packages/djcelery/management/commands/celeryd.py", line 17, in Command
option_list = CeleryCommand.option_list + worker.get_options()
File "/home/damon/Workspace/django-projects/project/env/lib/python2.6/site-packages/celery/bin/celeryd.py", line 89, in get_options
conf = self.app.conf
AttributeError: 'NoneType' object has no attribute 'conf'
Here's the version information:
% python ~/Workspace/django-projects/project/src
Python 2.6.5 (r265:79063, Apr 16 2010, 13:57:41)
[GCC 4.4.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import celery
>>> print celery.VERSION
(2, 2, 0, 'a1')
>>> import djcelery
>>> print djcelery.VERSION
(2, 2, 0, 'a1')

Should be easy to fix: just upgrade your install of django-celery.