I have added both python 2.7 and 3.4 to my system path. Personally I use python 3.4, however I use Vim as my editor and one of the plugins I use requires python 2.7 to be first in the path. This is annoying because now when I use the python command in the windows command line it loads python 2.7 rather than 3.4
Is there any way that I can add python 2.7 to the windows path just for vim? And make the command line load python 3.4?
EDIT: the plugin that requires python 2.7 is YouCompleteMe (https://github.com/Valloric/YouCompleteMe)
I needed this ability not because of Python versions but because of overbearing security policy. Where I work all persistent environment variables are privileged, so I put the following in my vimrc:
" Setup path
let $PATH.=';d:\python27;d:\python27\scripts'
let $PATH.=';d:\mingw\bin;d:\MinGW\msys\1.0\bin'
etc...
:help g:ycm_path_to_python_interpreter
In a doubt, reading the docs helps :)
A possible solution is to use a python version manager leave the system python version at 2.7 and install any other version you desire through the version manager.
An entire topic on python version mangers: https://stackoverflow.com/a/2812484/2745082
You can always rebuild the plugin to use python 3.4 if a version manger is to much trouble.
Related
I have installed "newspaper3k" both on the command line and onside the jupyter notebook. Both clearly say the package is installed. But when I sue import, it says the No Module named "newspaper".
It works on colab but not my local kernel (win 10, pyhton3).
Which python version you used while installing module and while running the code, it should be same.
Check if it is modules is present under Python{version}/lib. If not
try installing with the same python you are using try again.
If not there may be environment variable issue, set the same python version in ev
I have created my own Anaconda environment. I needed to use the 'comtypes' package to connect to the software ETABS, so I first downloaded it with the conda installation command and then I tried the next command line:
helper = comtypes.client.CreateObject('ETABSv17.Helper')
But, I received the next error:
AttributeError: module 'comtypes.gen.ETABSv17' has no attribute 'cHelper'
However, I realized that if a try the same command line with the base environment coming with Anaconda, that includes a pre-installed 'comtypes' package, there is no problem. In fact, if I check comtypes.gen.ETABSv17 with my customized environment and with the one from Conda, there is a huge difference between available attributes, even when they have the same version number: comtypes 1.1.7.
How can I get the exactly same 'comtypes' package that comes with Anaconda in order to have all the associated attributes working? Maybe, could there be some package dependence that I am missing?
Pd: I am using Windows10 and I have tried it in Pycharm and Spyder with Python 3.7
Thank you all !
I had this issue and i was using python 32 bit version. So uninstalled and installed a 64 bit version and now its working fine. May be this helps
I am trying to change the version of python that I'm running.
When i do python -V, it says 3.6 but if i do pythonw -V it is still running 3.7.
For this application, I need to run pythonw.
Is there a way to roll this back to use 3.6 (using OSX)?
You don't need to rollback anything.
Please take a look here.
There are several ways to define the version you want to run, from py launcher options to environment vars, ini settings, shebang lines, or even file type associations.
Jython Package installation issue, using pip
Hi, I have installed Jython2.7 configured with pydev in eclipse neon, also configured python 3.6 package
I am able to install packages for python using pip installer?
pip install "packagename"
Below are some of the packages in python/Lib/Site-packages directory
I was able to install all the packages
How do I use pip installer to install packages for jython?
I tried to install Jip package with
jython install setup.py
The binary File got installed in the Jython/Lib/Site-packages folder
However, I am not able to use it.
where and how do I get Jython package binaries like jip?
Also, Please let me know how to search jython packages?
Also, How to make pip install library packages in jython?
Any other configuration like jython home, etc that should be made?
This answer is going to be really generic but I just recently have slogged my way through the setup for jython/jip/pip and here's roughly what I had to do.
Firstly, I'm running Windows 7 64 Bit from behind a proxy (work machine.)
Had to install jython 2.7.0 instead of 2.7.1 because (I think anyway) 2.7.1 requires admin privileges which I don't have on my work PC.
Pip didn't install correctly during the Jython installation and I spent an obscene amount of time trying to get it installed and functioning as I knew it from my cpython days. NOTE: Just because you get pip installed, doesn't mean you can use any package on a python package repo. As of 2.7.0, Jython doesn't have end to end capability to interpret/compile some libraries that rely on certain python wrappers of native OS function calls. I believe 2.7.1 makes solid progress in the direction of supporting all needed native calls but don't quote me on that. For example, I tried to use wxPython to make a simple GUI to test my jython install. Trying to install it from pip kept causing really non-specific error info that took me a lot of time to figure out that the cause was jython simply couldn't compile the wxPython source so beware.
I had to set environment variables 'http_proxy' and 'https_proxy' in the form of http://proxyhosturl:port and https://proxyhosturl:port respectively to get out from behind the proxies without having to invoke pip with the proxy switch every time I called it.
To actually install pip, have a look here. These instructions are for Python and Linux/Unix but the principle is roughly the same. Just use jython -m instead of python -m and ignore the '$' at the start of each command line.
Also be sure to CD to your python_home/bin folder when invoking the ez_install exe.
If that doesn't work (didn't for me), try using get-pip.py script with these instructions https://pip.pypa.io/en/stable/installing/ (remember jython instead of python etc.). Download it, cd to the download location and follow the noted install steps. Worth noting is about half way down the install instructions where it details installing from local archives (source/binary zip or tar.gz archives of pip and setuptools as better described here: https://packaging.python.org/tutorials/installing-packages/#installing-from-local-archives).
The links to the bin archives of pip and setuptools are here:
https://pypi.python.org/pypi/setuptools
https://pypi.python.org/pypi/pip
It may also be worth making sure that your PATH environment variable has the jython/bin path in the variable value. The jython installer should do this but, again, mine did not.
If all goes well, you should be able to invoke pip with the --version switch and if it prints a line with the installed pip version info then you should be good to go
Another quirky issue I had was I could invoke a function of pip one time and any subsequent times I would get a stack trace ending with something along the lines of an object not having a certain property. I fixed that by finding my temp directory by opening a windows explorer instance and typing %TEMP% in the address bar and hitting enter, it should take you to a subdir of your AppData folder and there you may see a folder with the name of the package you were trying to install and the text "_pip" somewhere in the directory name. Delete the directory and try the pip install command again. I had to do this + invoke pip install pip -U to update my install to the latest version. Then pip began behaving correctly in my instance.
pip search numpy (or your library name) will generate a list of results with the same logic it uses to locate your desired package when you call pip install but, again, just because it returns a matching package doesn't mean it will compile when you install it (numpy doesn't work because of the missing java to C native function calls I described earlier.) The trade off is that you can import code artifacts from Java JAR files in your Jython script files and leverage their functionality with relative ease. Between the public Java APIs available and the python packages that work with the jython interpretor, you can (in my experience) come up with a way to accomplish your task. See the following info on JIP, Maven and IDEs.
IDE and jython integration (Eclipse)
- If you are stuck using Eclipse (like me) it actually has pretty decent support for python development. Install the PyDev plugin for Eclipse from Help -> Install Software. Put in this URL https://marketplace.eclipse.org/content/pydev-python-ide-eclipse, hit tab, and select the PyDev plugin and hit 'finish.'
- Setup the jython interpretor info from Windows -> Preferences -> PyDev. Provide the path to your jython.jar file.
- You should now be able to use File -> New PyDev project to create a basic python project and configure it to use your version of Jython and Java.
Brief Overview of Jip and Maven
- jip is a jython package that is invoked very similarly to pip but instead will download JAR files from the Maven Central Repository instead of python packages from pypi.com, for example. See the install instructions described here. Note the install procedure for a global jip install which differ from just pip install jip. https://pypi.python.org/pypi/jip/
- I never got jip to work exactly as I wished because there's not a ton of documentation on it outside of what I already linked. However, if you install a JAR using jip, you have to go to your project in Eclipse and actually add the JARs themselves to your PYTHONPATH in order for import statements and editing to have intellisense and so that you don't get a classnotfound exception at runtime. See following screen shot.
- There is a JIP config file that you can use similar to the pip config ini file but I have yet to find any exhaustive documentation on it's setup.
Note in the above screen shot the first entry in the External libraries entries. By default, pip places installed packages in that directory so to enable eclipse to find them, you need to also ensure that location is entered.
In Conclusion
- I have more to add to this answer and I will do so as soon as possible. In the meantime, see this example project I've loaded into github.
https://github.com/jheidlage1222/jython_java_integration_example
It shows basic config and how to interface with JARs from python code. I used the apache httpcomponents library as an example. Good luck amigo.
I have an app that requires Ruby 2.1 and use Puppet to provision a handful of servers.
The problem is, when I install on the 2.1 version of Ruby, Puppet starts using that, and it is not supported.
I would like to somehow point Puppet to a 2.0 version of Ruby installed in /opt.
Any suggestions?
Perhaps you could add a shebang line in the .rb file that points to the other version of ruby?
Alternatively you could try to specifically add the bin/ruby location in /opt to the $PATH variable.
Typically, you shouldn't let the system determine the path, but instead provide the full path to the Ruby interpreter you want to execute your script:
/usr/bin/ruby /some/path/to/foo.rb
Or:
/usr/local/bin/ruby1.9.2 /path/to/bar.rb