I'm trying:
pip install atari-py
on Python 3.5 and I am getting:
failed building wheel for atari-py
I'm using conda on Mac OS to build a python3.6 environment and I meet the same
failed building wheel for atari-py
Then I tried to find atari-py on here:
https://github.com/openai/atari-py
On this page it says:
Make sure you have cmake installed. On OSX, you probably want
brew install cmake.
Then after I install cmake and rebuild environment on my mac, there is no such fail anymore and the environment built success. Hope this will give you some hints!
Regarding " Populate wheelhouse with wheels you need " section in the
link: How to get into and adjust pip.conf ? How to activate virtualenv
?
Per-user:
On Unix the default configuration file is: $HOME/.config/pip/pip.conf
which respects the XDG_CONFIG_HOME environment variable.
On macOS the configuration file is $HOME/Library/Application Support/pip/pip.conf.
On Windows the configuration file is %APPDATA%\pip\pip.ini.
Inside a virtualenv:
On Unix and macOS the file is `$VIRTUAL_ENV/pip.conf`
On Windows the file is: `%VIRTUAL_ENV%\pip.ini`
To edit it you could use your favorite text editor. You could find more info in: https://pip.pypa.io/en/stable/user_guide/?highlight=pip.conf
Here another answer that could help you guiding (there is a complete faq to install some packages): Build wheel for a package (like scipy) lacking dependency declaration
And to understand & work with virtualenv, you should read: https://virtualenv.pypa.io/en/stable/
Hope this helps! Good luck!
Related
I'm having an error running simple code using cv2 module.
It's just:
import cv2
img = cv2.imread('sudoku.png',0)
cv2.imshow('image',img)
And it fails with the following error:
QObject::moveToThread: Current thread (0x1b74720) is not the object's thread (0x1e57d70).
Cannot move to target thread (0x1b74720)
I googled this error and tried a lot of things but it doesn't help. I tried installing without pip, I tried using step-by-step installation (from official OpenCV) but nothing helps.
When I run:
cv2.__version__
It returns 3.4.3
As noted already, the basis for this problem is discussed in opencv-python issue 46, and results from the duplication of the following libraries both on the host and the opencv-python distro libQtDBus libQtCore and libQtGui.
It has been lately addressed in the newest release of opencv-python. It is not a fix to the source code, rather the fix is to force pip to compile the newly available source via
pip install --no-binary opencv-python opencv-python
This will cause opencv-python to use the same libraries as the host, so the conflict no longer exists.
According to this issue posted on the OpenCV GitHub, this is a known issue that the developer states is damn near impossible to fix. It is apparently caused by a conflict in any Qt installations on the system with the Qt that is shipped with OpenCV. There are some suggestions floating around to remove the libqt5x11extras5 package from the system. This may fix it for some but anyone running these libraries on a Linux distribution that uses a window manager based on Qt will render their desktop environment unusable by removing this package (having tried it myself).
You can try building OpenCV from source using the WITH_GTK=ON option when running cmake which will use GTK instead of Qt, circumventing the conflict. However, this is hard to make use of in Python when using virtual environments.
I haven't spent the time to fully appreciate this problem, but as I understand this is caused by multiple conflicting versions of some plugin in the environment. I tried installing building opencv-python but there were errors with that approach. Another suggestion is to change your import order, but I've had mixed success with that, and I couldn't get it to work on a project today.
But I found a workaround that worked for me. Install opencv-python-headless instead of opencv-python. This will avoid installing the conflicting plugins. It may not work for you depending on what features of opencv you need.
$ pip uninstall opencv-python
$ pip install opencv-python-headless
The error was fixed on my system, by simply updating one library.
To find out where it is coming from, assuming Linux, try the following,
LD_DEBUG=files python -c "import cv2"
or,
LD_DEBUG=files python -c "import cv2 ; img = cv2.imread('myimage.png',0) ; cv2.imshow('image',img) ; cv2.waitKey(0)"
On my machine, it failed in one of the blas libraries. I updated that library and the code now runs without error.
This is an old bug you can find it discussed in a number of online communities.
My test code is as follows. Notably the error has not reoccurred, and apparently has nothing to do with Qt.
import cv2
img = cv2.imread('sudoku.png',0)
cv2.imshow('image',img)
cv2.waitKey(0)
To me, the solution to this problem was removing Anaconda, then installing pip followed by installing OpenCV with a simple pip install command.
I'm trying to use bluetooth with python, and I came across a module - pybluez. Right then, I tried installing it by running pip install pybluez. The package was located and downloaded, but it raised an error when running python setup.py egg_info.
I then tried to download pyBluez from this link https://pypi.python.org/pypi/PyBluez
But, it said that the Python version installed on my PC is not 2.7 ( I have 2.7.10; do I need 2.7.0 for this?) Also, this download link is for a 32-bit system, and that might be the reason it does not run on mine.
So I ask:
1. How do I fix this error?
Error in the output when I try to install pybluez using pip:
2.Does download using https://pypi.python.org/pypi/PyBluez need python 2.7.0, and a 32-bit system? If so, can someone suggest a better way for a 64-bit system?
3.Any other bluetooth module that could work as a substitute?
I have successfully built pybluez for win10x64 with python3.6
Download and install windows 10 build tools: https://www.visualstudio.com/pl/thank-you-downloading-visual-studio/?sku=BuildTools&rel=15
Run 'Developer Command Prompt for VS' as administrator
Clone pybluez repo https://github.com/karulis/pybluez
cd to directory with repo
run python setup.py install
Happy bluetoothing
This is an "expanded solution" which supplements the other answers posted.
Bluetooth is readily supported on Linux in basically any context. Python 3 built-in socket objects work over bluetooth even. But for Windows, there are hoops to jump through. The standard solution for this is to use PyBluez. If you're really lucky, you might be able to install with just pip install PyBluez-win10. If that fails, however, the way to go is an installation via a pre-compiled "wheel".
A given wheel only works for your specific context, however, i.e. exact Python version. So, for the sake of future proofing, if you are going to need PyBluez, you should know how create a wheel from the source for yourself. It's a long, annoying process if you don't have the all the software required already and are not familiar with some parts of the process e.g. using Anaconda. So, if you are working in a team, I suggest having one person burn their time on this and then share the wheel with everyone (who are hopefully on the same version of Python!).
The following is a paraphrased version of what is posted here: https://github.com/pybluez/pybluez/issues/180 which includes the actual developer's comments and methodology.
Download and run the "Visual Studio Build Tools" installer:
For an official list of exact compilers and links to match against target Python versions, refer to: https://wiki.python.org/moin/WindowsCompilers
Here's the 2019 Build Tools link, which works with Py3.7:
https://visualstudio.microsoft.com/downloads/#build-tools-for-visual-studio-2019
During the install you MUST select BOTH "Visual C++ build tools" AND "Universal Windows Platform build tools". Leave the default options alone within those (e.g. including the Windows 10 SDK).
Note: this requires 15GB of disk space, and some patience!
Install "Miniconda":
https://docs.conda.io/en/latest/miniconda.html
Select the one which matches the bit set (32 vs 64) of the destination Python version
you wish to install PyBluez into.
Clone the PyBluez source repo to a temp location (e.g. your desktop). Then, launch the terminal and change into that directory:
git clone https://github.com/pybluez/pybluez
cd pybluez
If you did NOT put conda on the system path (as the installer recommends NOT doing so), you can add it for this local CMD session per this example command:
set CONDA_DIR=%USERPROFILE%\Miniconda3
set PATH=%CONDA_DIR%\condabin;%PATH%
Create a dedicated environment to build pybluez with the desired Python version. Then, launch that. The example below uses Python 3.7 but the same steps will also work for other versions (including Py 2.x etc)
conda create -y -n pybluez python==3.7
activate pybluez
Build a wheel file. Then, leave the dedicated environment.
python setup.py install
python setup.py bdist_wheel
deactivate
Copy the wheel to your desktop. From there, you can do with it as you wish. Then, delete the pybluez conda environment and the source repo, (as you no longer need either of them).
copy .\dist\*.whl "%USERPROFILE%\Desktop"
cd..
rd /s /q "%CONDA_DIR%\envs\pybluez"
rd /s /q pybluez
Finally, you can install the wheel to a target Python instance and/or store/share it:
The name of these files and the path will vary, so define those first for your use case
set PYBLUEZ_WHEEL=%USERPROFILE%\Desktop\PyBluez-0.22-cp37-cp37m-win_amd64.whl
set PYTHON_PATH=python
Install the wheel:
%PYTHON_PATH% -m pip install "%PYBLUEZ_WHEEL%"
Confirm installation:
%PYTHON_PATH% -c "import bluetooth; print(bluetooth.__version__)"
I downloaded a Python 3.6 wheel from here (wheels for python 2.7, 3.5, 3.6, 3.7 available too).
I installed it in my virtual environment via
pip install PyBluez-0.22-cp36-cp36m-win_amd64.whl
One command solution.
pip install git+https://github.com/pybluez/pybluez.git#egg=pybluez
On windows7 64bits, I just installed Eric6 in this way :
python -m pip install pyqt5
python -m pip install QScintilla
install.py
I tried to follow their first tutorial LogParser on https://eric-ide.python-projects.org/tutorials/LogParser/chap2.html
When coming to create LogParser.ui I get the following error :
Could not start Qt-designer
Ensure that it is available as ...Python36\lib\site-packages\PyQt5\Qt\bin\designer.exe
When checking there is a folder: C:\Users\Gustav\AppData\Local\Programs\Python\Python36\Lib\site-packages\PyQt5\Qt\bin
But its not containg any exe file
Any help would be nice !
I managed to install QT Designer as follows (as a stand-alone application, not using Eric IDE):
Install latest QT (I'm using 5.8) from QT main site
Make sure you include "Qt 5.8 MinGW" component
QT Designer will be installed in C:\Qt\5.8\mingw53_32\bin\designer.exe
Note that the executable is named "designer.exe"
I need to run a program which use VTK5 on my Archlinux PC, but I found it really hard to install VTK5, there is only VTK6(not compatible with VTK5) in official repo, and when I try to install it from AUR, it returns "Makepg was unable to build vtk5", then I try to install through source code, the result is that I was unable to install the VTK Python module...
Is there anybody who has any experience or idea about it?
I have not installed on Archlinux specifically, but on different linux machines. If you compile from source and are interested in python, remember to select the option python wrapping when running cmake. Btw, once built, you will have to update both the pythonpath and the ldlibrarypath.
You can also have a try at enthought canopy, which distributes a complete installation with numpy, scipy, vtk http://docs.enthought.com/canopy/quick-start/install_linux.html
I'm getting error while trying to install sqlite3-ruby gem:
gem install sqlite3-ruby-1.3.1.gem
Building native extensions. This could take a while...
ERROR: Error installing sqlite3-ruby-1.3.1.gem:
ERROR: Failed to build gem native extension.
/usr/bin/ruby.exe extconf.rb
Gem files will remain installed in /usr/lib/ruby/gems/1.9.1/gems/sqlite3-ruby-1.3.1 for inspection.
Results logged to /usr/lib/ruby/gems/1.9.1/gems/sqlite3-ruby-1.3.1/ext/sqlite3/gem_make.out
Same using:
gem install sqlite3-ruby-1.3.1
And that worked:
gem install sqlite3-ruby-1.3.1-x86-mswin32-60.gem
However I discovered I had had installed sqlite-ruby-1.2.5
Well my question is how 'gem' is installing these things? Why it can't choose sqlite3-ruby-1.3.1-x86-mswin32-60.gem version automatically. Does 'gem' is aware of running on linux or windows? What is native extension for it and why it is failing to install predownloaded sqlite3-ruby-1.3.1.gem
Thanks in advance
Lots of people seem to be having this issue. I'm surprised this doesn't work out of the box, as I would have guessed cygwin+ruby+sqlite is a supercommon configuration. Anyway. Many people concentrate on sqlite3.h, which is what appears are missing in the error output. However, my problem was that gcc wasn't installed correctly. Apparently gcc can fail to install correctly under cygwin. I fixed that and it was fine. Also, make sure you install libsql3-devel in cygwin.
I've been down this road before. I failed installing Ruby in Windows to work with Cygwin and I failed on Ubuntu.
What you do to save yourself the time and trouble is get a VM running with a Linux image (Fedora seemed to work well) and work with Ruby in that.