I'm trying to wrap my head around virtualenv and pip still.
If I use pip to install a library, it doesn't matter where I 'cd' to, because it installs the libraries in the same place right (which i dont even know where that is)? So I guess my question is, when I install something with pip, how do I make sure it only installs that library inside of my virtual environment? Do I need to cd to that directory first? or is there a command I'm supposed to use with pip to make sure it only installs to the virtualenv project I'm working in?
Activate virtualenv first:
source virt_name/bin/activate
Then after that, install the libraries:
pip install module_name
Note: Don't use sudo with pip because sometimes it will assume you want to install in /usr/local/lib/site-packages.
Generally speaking, if you do not use virtualenv --system-site-packages to create your virtualenv, you should be only working with your per-environment packages.
Providing you run the activate script before installing anything.
i.e. Do the following, if you want to install something in your virtualenv.
Run activate script
Windows: [ve_directory]\Script\activate.bat
Linux: source [ve_directory]/bin/activate
pip install [your requirements]
I think it doesn't matter where your current working directory is.
Reference:
http://www.virtualenv.org/en/latest/#the-system-site-packages-option
When you create a new environment with virtualenv, among other things it creates a bash script venv/bin/activate (where venv is the folder you specified when you created the environment; libraries are located there as well, by the way). When you run it in your shell the environment variables become arranged so that pip installs new libraries in this environment's folder. See virtualenv docs for details, section "activate script".
Related
I have installed Anaconda since it was recommended to use in the OpenMDAO's website. After that I typed pip install 'openmdao[all]' as instructed. However I get an error message saying, "ERROR: Invalid requirement: "'openmdao[all]'"" I was wondering how can I solve this issue. I have no knowledge about the Python or anaconda therefore I don't have a clue what to do about this situation. I searched the internet however I didn't find a solution to this. Thanks in advance!
It's possible you're running the wrong pip executable. Try which pip - it should be located under your home directory instead of a system path such as /bin/pip or /usr/bin/pip.
Make sure you've created and activated an environment in Anaconda:
conda create -n myenv pip
conda activate myenv
python -m pip install 'openmdao[all]'
That command sequence will give the highest chance of success. The single quotes are required for shells like zsh.
Remove the single quotes:
pip install openmdao[all]
I have pip installed powerline-shell in my base conda env. Switching envs yields the following error:
conda activate <env_name>
-bash: powerline-shell: command not found
I also tried running conda init powershell but it took no actions.
I have miniconda3, with conda 4.7, installed on MacOS Mojave.
I don't know a simple solution to this. I'm thinking you either need to install it in every env (which I don't recommend because it's best to avoid using pip in Conda) or you create a link to the powerline-shell binary in another location that you can keep on PATH to avoid adding the entire miniconda3/bin/ directory to PATH. I've done something like this in the past, but never with a Python entry point before.
I'd try something like
mkdir -p ~/.local/bin
ln -s /your/path/to/miniconda3/bin/powerline-shell ~/.local/bin/powerline-shell
Then add .local/bin to PATH in your .bashrc, probably toward the beginning (e.g., before the Conda section). The path here (~/.local/bin) is totally arbitrary, so adjust to your preferences. Main point is to minimize what you are exposing globally in a shell session.
Note: conda init powershell is for Windows PowerShell users.
I am using pycharm 5.0.4 community edition.
I wanted to install package fuzzywuzzy.
But when i go to project interpreter window and try to install package, it shows me no available packages.
Can it be issue because I am using my work desktop.
Thanksenter image description here
Can you provide more details- Are you not able to see any packages? Try searching for some other packages like pip, matplotlib, django, numpy etc. Sometimes it takes time for the IDE to build skeletons before you can actually start installing the packages. So once the IDE wait for it to complete its setup and then try to access the installation packages available.
Also if you do you have any other python interpreter installed on your local machine? If so then try switching to that interpreter.
Below are some steps you can try, which worked for me:
Step-1 Activate your intelpython using:
source <your installation path>/bin/activate
Step-2 Clone the environment using conda clone command and make sure the pwd is ~/:
conda create -n <source_environment> --clone <destination_environment>
Step-3 Activate the cloned environment:
source ~/.conda/envs/<your_environment>/bin/activate
Step-4 Provide read-wite permissions to intelpython and cloned enviroment using:
sudo chown -R <user_name>:<group_name> /<path_to_directory i.e. /opt/intel and ~/.conda/envs>
Step-5 Open Pycharm and in System Interpreter add the path to above created enviroment and then you can use pip or Pycharm itself, it should work.
I had a similar problem. I was using the Intel python distribution, and installing packages required write permissions to the folder that intelpython was installed in, which in my case was /opt/intel/intelpython2.
Try adding write permissions to the folder using the following command:
sudo chown -R <username> </path/to/folder>
Then try adding missing packages and/or repositories as seen in this page - https://www.jetbrains.com/help/pycharm/installing-uninstalling-and-upgrading-packages.html.
I see some tutorials online but they only show how to install git onto Cygwin AS you are installing Cygwin. I already have cygwin installed and customized so I'd prefer not to repeat that step. How do I install the git framework so I can use it for github?
Thank you.
In the world of Cygwin, there is really no such thing as only installing a package AS you are installing Cygwin. Cygwin was inherently designed with a setup.exe to be run multiple times when necessary.
There are thousands of packages available in the Cygwin repo mirrors. From what you are saying, it sounds as if you had a single go-round with the setup file and then planned to never install any additional available packages or upgrade them in the future. This is what the Cygwin setup file is specifically used for.
If you don't currently have Git installed in your particular Cygwin environment, just run setup.exe again and select the package. It should automatically detect your current installation directory and package directory and previously-selected mirror. When you mark the Git package for installation, it will automatically download all dependencies, just like apt-get or any other *NIX package manager.
There is also an abandoned project called apt-cyg that I still use religiously, especially on remote systems over SSH in order to avoid the GUI setup.exe. apt-cyg is basically a shell script that will install your package directly from the command line, apt-get-style. It requires wget and subversion, but after the 30 seconds it takes to setup, you'd just run apt-cyg install git. It also installs dependencies, just like the GUI setup.exe.
There is also a similar alternative if you install Cygwin via Chocolatey package manager -- you can also install cyg-get (I believe it's called). The syntax is a bit different -- something like cyg-get git. I don't really like this method, because it differs from apt-cyg in the fact that it actually uses the setup.exe and just automates the process so that you don't have to click anything. I don't use this method, because the last I checked, Chocolatey only supported 32-bit Cygwin installs, which is also what the cyg-get package looks for.
apt-cyg may be abandoned, but it has yet to disappoint, and if I know what I'm looking for, I always prefer it over running the setup.exe for package installation.
It looks like the project has been picked back up and is under active development again: https://github.com/transcode-open/apt-cyg
It appears this version requires lynx to install. I don't know. I still just use the original version on Google Code that worked just fine the last I checked: https://code.google.com/p/apt-cyg/
Edit: There has been a new Cygwin package manager out for awhile called cyg-get that can be installed via Chocolatey.
I'm not sure if it only works for Chocolatey-installed Cygwin installations or not, as Chocolatey doesn't install Cygwin in the normal locations anymore by default. Feel free to comment, but cyg-get is now my Cygwin package manager of choice unless I'm running an older installation of Cygwin that was not installed by Chocolatey. I avoided it for a while because they only supported 32-bit installations, but I can confirm that Chocolatey now supports 64-bit installations of Cygwin, and the cyg-get package manager works perfectly with it. I have a function sourced from my ~/.bashrc where I can use either apt or apt-get (with or without the install parameter, and it will just call cyg-get.bat with the programs I have specified to install.
http://redmine.jamoma.org/projects/1/wiki/Installing_and_setting_up_GIT
By following the steps mentioned in the link for windows you can install git using cygwin
I've installed mongoctl according to Mongolab's simple instructions, but I can't do anything with the installed package because which mongoctl resolves to nothing.
The site makes it look like pip installs some kind of command line tool, but it seems like it just installs the python package, which would be fine if all of the documentation didn't treat mongoctl as a command line tool.
What's going on?
You can add the following option to your install command to ensure that "mongoctl" exe goes to /usr/local/bin
--install-option="--install-scripts=/usr/local/bin"
Since mongoctl is already installed on your mac, you will probably need to add a --upgrade and a --force-reinstall
So try the following
sudo pip install mongoctl --install-option="--install-scripts=/usr/local/bin" --upgrade --force-reinstall
What OS are you using?
'mongoctl' should be in /usr/local/bin. Check to make sure that directory is in your PATH
-will