I am trying to get the usb.find command to work properly in a python script I'm writing on Angstrom for the Beagleboard.
Here is my code:
#!/usr/bin/env python
import usb.core
import usb.util
import usb.backend.libusb01 as libusb
PYUSB_DEBUG_LEVEL = 'debug'
# find our device
# Bus 002 Device 006: ID 1208:0815
# idVendor 0x1208
# idProduct 0x0815
# dev = usb.core.find(idVendor=0xfffe, idProduct=0x0001)
# iManufacturer 1 TOROBOT.com
dev = usb.core.find(idVendor=0x1208, idProduct=0x0815,
backend=libusb.get_backend() )
I don't know what's missing, but here is what I do know.
When I don't specify the backend, no backend is found. When I do specify the backend usb.backend.libusb01 I get the following error:
root#beagleboard:~/servo# ./pyServo.py
Traceback (most recent call last):
File "./pyServo.py", line 17, in <module>
dev = usb.core.find(idVendor=0x1208, idProduct=0x0815, backend=libusb.get_backend() )
File "/usr/lib/python2.6/site-packages/usb/core.py", line 854, in find
return _interop._next(device_iter(k, v))
File "/usr/lib/python2.6/site-packages/usb/_interop.py", line 60, in _next
return next(iter)
File "/usr/lib/python2.6/site-packages/usb/core.py", line 821, in device_iter
for dev in backend.enumerate_devices():
File "/usr/lib/python2.6/site-packages/usb/backend/libusb01.py", line 390, in enumerate_devices
_check(_lib.usb_find_busses())
File "/usr/lib/python2.6/ctypes/__init__.py", line 366, in __getattr__
func = self.__getitem__(name)
File "/usr/lib/python2.6/ctypes/__init__.py", line 371, in __getitem__
func = self._FuncPtr((name_or_ordinal, self))
AttributeError: python: undefined symbol: usb_find_busses
What am I missing so that this will work properly?
Try installing python-pyusb through opkg, that should install the native dependencies.
Related
I am using an Anaconda environment with Python 3.6.8, created with conda create -n temp pandas pytables h5py python=3.6.8. When I try to read a .h5 file like:
f = pd.read_hdf(filename, key)
I get an ValueError exception:
Traceback (most recent call last):
File "read_data.py", line 6, in <module>
f = pd.read_hdf(filename, key)
File "/home/fauzanzaid/anaconda3/envs/temp/lib/python3.6/site-packages/pandas/io/pytables.py", line 394, in read_hdf
return store.select(key, auto_close=auto_close, **kwargs)
File "/home/fauzanzaid/anaconda3/envs/temp/lib/python3.6/site-packages/pandas/io/pytables.py", line 741, in select
return it.get_result()
File "/home/fauzanzaid/anaconda3/envs/temp/lib/python3.6/site-packages/pandas/io/pytables.py", line 1483, in get_result
results = self.func(self.start, self.stop, where)
File "/home/fauzanzaid/anaconda3/envs/temp/lib/python3.6/site-packages/pandas/io/pytables.py", line 734, in func
columns=columns)
File "/home/fauzanzaid/anaconda3/envs/temp/lib/python3.6/site-packages/pandas/io/pytables.py", line 2928, in read
ax = self.read_index('axis%d' % i, start=_start, stop=_stop)
File "/home/fauzanzaid/anaconda3/envs/temp/lib/python3.6/site-packages/pandas/io/pytables.py", line 2523, in read_index
_, index = self.read_index_node(getattr(self.group, key), **kwargs)
File "/home/fauzanzaid/anaconda3/envs/temp/lib/python3.6/site-packages/pandas/io/pytables.py", line 2621, in read_index_node
data = node[start:stop]
File "/home/fauzanzaid/anaconda3/envs/temp/lib/python3.6/site-packages/tables/vlarray.py", line 685, in __getitem__
return self.read(start, stop, step)
File "/home/fauzanzaid/anaconda3/envs/temp/lib/python3.6/site-packages/tables/vlarray.py", line 821, in read
listarr = self._read_array(start, stop, step)
File "tables/hdf5extension.pyx", line 2155, in tables.hdf5extension.VLArray._read_array
ValueError: cannot set WRITEABLE flag to True of this array
This problem goes away if I use an environment with python 3.7, or 3.5. However, I need to use python 3.6.
How can I resolve this error?
I downgraded numpy to 1.14.3 with below command, and it worked for me:
pip3 install numpy==1.14.3
I've got an python application that generates charts using BOKEH (0.12), the charts are all standalone (i.e BOKEHJS gets inlined) so that there's no need for the browser to go onto the web to find the CDN or make any external connections.
It all works fine when I am running it from Eclipse, chart displays no problem. But when I try to package it with py2exe, the html file is created but no chart is shown when I open it in browser. This is what my setup.py looks like
from distutils.core import setup
import py2exe
import os
import psutil
import pkg_resources
import inspect
import matplotlib
import sys
import bokeh.core
import zipfile
sys.setrecursionlimit(5000)
includes=["sqlite3","PyQt4","decimal","bokeh.core","jinja2","matplotlib","mpl_toolkits","matplotlib.backends.backend_wx","bokeh"]
excludes=[]
packages=["pkg_resources"]
dll_excludes=['libgdk-win32-1.0-0.dll', 'libgobject-2.0-0.dll', 'tcl84.dll', 'tk84.dll', 'msvcp90.dll','msvcr71.dll', 'IPHLPAPI.DLL', 'NSI.dll', 'WINNSI.DLL', 'WTSAPI32.dll']
dir_name = os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe()))) # script directory
parent_dir_name=os.path.abspath(os.path.join(dir_name,os.pardir))
iconfile_config_location = "my_icon.ico"
configuration_location = "my_configuration.ini"
database_location = "localDB"
datafiles = [('', [configuration_location,database_location])]
datafiles.extend(matplotlib.get_py2exe_datafiles())
current_dir = os.path.dirname(os.path.realpath(__file__))
dist_dir = os.path.join(current_dir, "release")
setup(
options={"py2exe": {"compressed": 2,
"optimize": 0,#string or int of optimization level (0, 1, or 2) 0 = do not optimize (generate .pyc) 1 = normal optimization (like python -O) 2 = extra optimization (like python -OO)
"includes": includes,
"excludes": excludes,
"packages": packages,
"dll_excludes": dll_excludes,
"bundle_files": 2,
"dist_dir": "release",
"xref": False,
"skip_archive": False,
"ascii": False,
"custom_boot_script": '',
}
},
windows=[{"script":"main.py","icon_resources": [(1, iconfile_config_location)],}],
data_files= datafiles
)
# Add boke/core/_templates files to the library.zip file
bokeh_path = sys.modules['bokeh.core'].__path__[0]
zipfile_path = os.path.join(dist_dir, "library.zip")
z = zipfile.ZipFile(zipfile_path, 'a')
for dirpath,dirs,files in os.walk(os.path.join(bokeh_path, '_templates')):
for f in files:
fn = os.path.join(dirpath, f)
z.write(fn, os.path.join(dirpath[dirpath.index('bokeh'):], f))
z.close()
Can anyone guide me on how to package Bokeh so that the resulting executable can make use of it. (i.e everything gets bundled in together) is it possible?
I also noticed that when I set the optimize option to 2, it doesn't work, I get the error
File "zipextimporter.pyo", line 82, in load_module
File "bokeh\plotting\__init__.pyo", line 2, in <module>
File "zipextimporter.pyo", line 82, in load_module
File "bokeh\document.pyo", line 36, in <module>
File "zipextimporter.pyo", line 82, in load_module
File "bokeh\model.pyo", line 12, in <module>
File "zipextimporter.pyo", line 82, in load_module
File "bokeh\core\properties.pyo", line 73, in <module>
File "zipextimporter.pyo", line 82, in load_module
File "bokeh\core\enums.pyo", line 25, in <module>
File "zipextimporter.pyo", line 82, in load_module
File "bokeh\icons.pyo", line 78, in <module>
TypeError: unsupported operand type(s) for +=: 'NoneType' and 'str'
Any ideas
i installed google-cloud-sdk in ubuntu 14.04 and when tried to login,it is showing this error.
krish#jarvis:~$ gcloud auth login
Traceback (most recent call last):
File "/usr/bin/../lib/google-cloud-sdk/./lib/googlecloudsdk/gcloud/gcloud.py", line 87, in
from googlecloudsdk.calliope import base
File "/usr/bin/../lib/google-cloud-sdk/./lib/googlecloudsdk/calliope/base.py", line 8, in
from googlecloudsdk.core import log
File "/usr/bin/../lib/google-cloud-sdk/./lib/googlecloudsdk/core/log.py", line 413, in
_log_manager = _LogManager()
File "/usr/bin/../lib/google-cloud-sdk/./lib/googlecloudsdk/core/log.py", line 195, in init
self.console_formatter = _ConsoleFormatter(sys.stderr)
File "/usr/bin/../lib/google-cloud-sdk/./lib/googlecloudsdk/core/log.py", line 172, in init
use_color = not properties.VALUES.core.disable_color.GetBool()
File "/usr/bin/../lib/google-cloud-sdk/./lib/googlecloudsdk/core/properties.py", line 782, in GetBool
value = _GetBoolProperty(self, PropertiesFile.Load(), required)
File "/usr/bin/../lib/google-cloud-sdk/./lib/googlecloudsdk/core/properties.py", line 1141, in Load
PropertiesFile._PROPERTIES = PropertiesFile(paths)
File "/usr/bin/../lib/google-cloud-sdk/./lib/googlecloudsdk/core/properties.py", line 1160, in init
self.__Load(properties_path)
File "/usr/bin/../lib/google-cloud-sdk/./lib/googlecloudsdk/core/properties.py", line 1174, in __Load
raise PropertiesParseError(e.message)
googlecloudsdk.core.properties.PropertiesParseError: File contains no section headers.
file: /home/krish/.config/gcloud/properties, line: 1
'h4\xaf\xe3\xda^\xa6\xe8\xb2\xdb`$?\x11\x7f\xce\xc1\x1f\x88\xcd"\x82c\x13Bj\x07\xc3\xe3\x9ds\xdd d\xe1\n'
This does look like you have a corruppted gcloud config file /home/krish/.config/gcloud/properties. Check what's the context, may be it's just one line and you can fix it, or just move/remove it (you will need to set all configurations once again if you did any).
Im trying to install GSUTIL, after installation it gives the following output for every command,
Traceback (most recent call last):
File "/usr/local/bin/gsutil", line 5, in <module>
from pkg_resources import load_entry_point
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2749, in <module>
working_set = WorkingSet._build_master()
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 446, in _build_master
return cls._build_from_requirements(__requires__)
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 459, in _build_from_requirements
dists = ws.resolve(reqs, Environment())
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 632, in resolve
raise VersionConflict(dist,req) # XXX put more info here
pkg_resources.VersionConflict: (httplib2 0.8 (/usr/lib/python2.7/dist-packages), Requirement.parse('httplib2>=0.9.1'))
That means you need to update the version of httplib2 installed on your system to at least v 0.9.1.
i have added djcelery and kombu.transport.django to django apps.
settings.py:
import djcelery
djcelery.setup_loader()
from .celery import app as celery_app
BROKER_URL = "redis://abc:abc#localhost:6379/0"
CELERYBEAT_SCHEDULER = "djcelery.schedulers.DatabaseScheduler"
CELERY_TIMEZONE = "Europe/London"
CELERY_ENABLE_UTC = True
# store AsyncResult in redis
CELERY_RESULT_BACKEND = "redis"
REDIS_HOST = "localhost"
REDIS_PORT = 6379
REDIS_DB = 0
REDIS_VHOST = 0
REDIS_USER="xyz"
REDIS_PASSWORD="xyz"
REDIS_CONNECT_RETRY = True
celery.py
from __future__ import absolute_import
import os
from celery import Celery
from django.conf import settings
from . import celeryconfig
# set the default Django settings module for the 'celery' program.
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'config.settings')
app = Celery('apps')
# Using a string here means the worker will not have to
# pickle the object when using Windows.
app.config_from_object('django.conf:settings')
app.autodiscover_tasks(lambda: settings.INSTALLED_APPS)
#app.task(bind=True)
def debug_task(self):
print('Request: {0!r}'.format(self.request))
celery supervisor configuration:
[program:celeryd]
command=/home/vagrant/.virtualenvs/project/bin/python /vagrant/project/manage.py celeryd -B -E -c 1 --settings=config.settings
directory=/vagrant/project
user=vagrant
autostart=true
autorestart=true
stdout_logfile=/var/log/supervisor/celeryd.log
stderr_logfile=/var/log/supervisor/celeryd_err.log
when a task is scheduled using django-celery interface which supposed to download some files, following errors are thrown:
Traceback (most recent call last):
File "/home/vagrant/.virtualenvs/project/local/lib/python2.7/site-packages/celery/beat.py", line 203, in maybe_due
result = self.apply_async(entry, publisher=publisher)
File "/home/vagrant/.virtualenvs/project/local/lib/python2.7/site-packages/celery/beat.py", line 259, in apply_async
entry, exc=exc)), sys.exc_info()[2])
File "/home/vagrant/.virtualenvs/project/local/lib/python2.7/site-packages/celery/beat.py", line 251, in apply_async
**entry.options)
File "/home/vagrant/.virtualenvs/project/local/lib/python2.7/site-packages/celery/app/task.py", line 555, in apply_async
**dict(self._get_exec_options(), **options)
File "/home/vagrant/.virtualenvs/project/local/lib/python2.7/site-packages/celery/app/base.py", line 323, in send_task
reply_to=reply_to or self.oid, **options
File "/home/vagrant/.virtualenvs/project/local/lib/python2.7/site-packages/celery/app/amqp.py", line 302, in publish_task
**kwargs
File "/home/vagrant/.virtualenvs/project/local/lib/python2.7/site-packages/kombu/messaging.py", line 168, in publish
routing_key, mandatory, immediate, exchange, declare)
File "/home/vagrant/.virtualenvs/project/local/lib/python2.7/site-packages/kombu/connection.py", line 440, in _ensured
return fun(*args, **kwargs)
File "/home/vagrant/.virtualenvs/project/local/lib/python2.7/site-packages/kombu/messaging.py", line 180, in _publish
[maybe_declare(entity) for entity in declare]
File "/home/vagrant/.virtualenvs/project/local/lib/python2.7/site-packages/kombu/messaging.py", line 111, in maybe_declare
return maybe_declare(entity, self.channel, retry, **retry_policy)
File "/home/vagrant/.virtualenvs/project/local/lib/python2.7/site-packages/kombu/common.py", line 99, in maybe_declare
return _maybe_declare(entity)
File "/home/vagrant/.virtualenvs/project/local/lib/python2.7/site-packages/kombu/common.py", line 110, in _maybe_declare
entity.declare()
File "/home/vagrant/.virtualenvs/project/local/lib/python2.7/site-packages/kombu/entity.py", line 505, in declare
self.queue_declare(nowait, passive=False)
File "/home/vagrant/.virtualenvs/project/local/lib/python2.7/site-packages/kombu/entity.py", line 531, in queue_declare
nowait=nowait)
File "/home/vagrant/.virtualenvs/project/local/lib/python2.7/site-packages/kombu/transport/virtual/__init__.py", line 447, in queue_declare
return queue_declare_ok_t(queue, self._size(queue), 0)
File "/home/vagrant/.virtualenvs/project/local/lib/python2.7/site-packages/kombu/transport/redis.py", line 651, in _size
sizes = cmds.execute()
File "/home/vagrant/.virtualenvs/project/local/lib/python2.7/site-packages/redis/client.py", line 2157, in execute
conn.disconnect()
File "/home/vagrant/.virtualenvs/project/local/lib/python2.7/site-packages/kombu/transport/redis.py", line 800, in disconnect
channel._on_connection_disconnect(self)
File "/home/vagrant/.virtualenvs/project/local/lib/python2.7/site-packages/kombu/transport/redis.py", line 461, in _on_connection_disconnect
self.connection.cycle._on_connection_disconnect(connection)
File "/home/vagrant/.virtualenvs/project/local/lib/python2.7/site-packages/kombu/transport/redis.py", line 259, in _on_connection_disconnect
self.poller.unregister(connection._sock)
File "/home/vagrant/.virtualenvs/project/local/lib/python2.7/site-packages/kombu/utils/eventio.py", line 85, in unregister
self._epoll.unregister(fd)
SchedulingError: Couldn't apply scheduled task downloader: argument must be an int, or have a fileno() method.
and i'm not getting any clue where from these errors are coming...
any suggestions will be greatly appreciated.
Update 1:
i use django-celery admin interface to schedule a task and task is defined inside an app registered in INSTALLED_APP as follows:
#shared_task
def downloader():
# execute static/shell_scripts/feed_downloader.sh
import subprocess
PROJECT_PATH = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
subprocess.call(PROJECT_PATH+"/static/shell_scripts/feed_downloader.sh", shell=True)
the feed_downloader.sh file calls a django management command which if i execute independetly works fine like:
python manage.py feed_downloader
if i add a print statement just before line no. 85 to check fd parameter in file
/home/vagrant/.virtualenvs/project/local/lib/python2.7/site-packages/kombu/utils/eventio.py
then following messages get printed:
see this <socket._socketobject object at 0x131b750>
see this None
see this <socket._socketobject object at 0x131bc90>
see this None