I do not add anaconda3/bin into my $PATH variable in ubuntu(run which conda return null).
I also can use conda -V and conda -h in another directory.
Of course, the executable file conda in anaconda3/bin also works.
but another command like jupyter only works we are in the following directory anaconda3/bin.
I'm puzzled about it, the issue seems to be the environmental variable, I don't know how to fix it, any help is appreciated.
Add the anaconda path to the bash
cd ~
gedit .bashrc
export PATH=~/anaconda3/bin:$PATH
Related
I need to provide my version of Python and packages for a project.
How can I do that?
I tried:
sudo apt-get install python3-venv
virtualenv my-env -p python3
source tutorial-env/bin/activate
This should show installed packages, but it shows:
pip list
DEPRECATION: The default format will switch to columns in the future. You can use --format=(legacy|columns) (or define a format=(legacy|columns) in your pip.conf under the [list] section) to disable this warning.
pip (9.0.1)
pkg-resources (0.0.0)
setuptools (39.0.1)
This is also suspicious:
(tutorial-env) linux#LINUXMINT:~$ pip freeze > requirements.txt
(tutorial-env) linux#LINUXMINT:~$ cat requirements.txt
pkg-resources==0.0.0
(tutorial-env) linux#LINUXMINT:~$ python -m pip install -r requirements.txt
Requirement already satisfied: pkg-resources==0.0.0 in ./tutorial-env/lib/python3.6/site-packages (from -r requirements.txt (line 1))
And I cannot find requirements.txt in my directory.
Pass the version of python when creating your virtualenv like this:
virtualenv my-env -p python3
I think you should not use any external module for creating a virtual environment.
You can create a Virtual Environment by using venv attribute of Python in Command Line.
What is the syntax?
The syntax is pretty simple.
C:\>python -m venv path\to\where\you\want\to\create\it
It can be easily done, and you can get a reference from the example below:
C:\>python -m venv "C:\Users\Bhavyadeep\Desktop\Discord Bots\Bot" 1\Bot-1-env
Here the name Bot-1-env is the name of the folder which will be created on execution of the command, and it doesn't have to exist.
What if I am using an IDE (like VS Code), then how will I create a virtual environment?
Creating a Virtual Environment in an IDE is much easier than creating it using CMD. In CMD you need to specify the full path of the directory where the Environment has to be created whereas in an IDE you can create one using its own terminal and also there won't be any need of adding and full path to the directory.
Syntax for IDEs with their Terminals is:
C:\>python -m venv My-Env
This would simply create a Virtual Environment in the folder of the project you are working on in the IDE. If you still want to create it using full path you can do the same as above in the Terminal of IDE.
Example with Images and Code in One Step:
My target directory would be the Desktop for now to explain.
Write and Execute the command in Command Line.
I entered the line in the image and pressed Enter.
Here the name of the Folder would be Example-Venv and it doesn't exist. This command created a folder with that name and created that a Virtual Environment.
This command created a folder, and it can be seen in the picture below.
Now you can use it anywhere you want by simply making this folder as the Interpreter.
How to set interpreter?
The following links would explain:
Pycharm: https://www.jetbrains.com/help/pycharm/configuring-python-interpreter.html
VS Code: https://code.visualstudio.com/docs/python/environments#:~:text=To%20select%20a%20specific%20environment,or%20library%20versions%20as%20needed.
Spyder: https://www.spyder-ide.org/blog/release-spyder-330/#:~:text=Just%20set%20the%20path%20under,start%20in%20the%20selected%20environment.
Sublime: https://medium.com/#hariyanto.tan95/set-up-sublime-text-3-to-use-python-3-c845b742c720
I was glad to help! If you still get any problem, please feel free to ask in the comments and I would gladly help you! :)
Thank You! :)
I installed JupyterLab with
pip3 install jupyterlab --user
Yet, when trying I try to launch it (jupyter lab), I get the following error:
Error executing Jupyter command 'lab': [Errno 2] No such file or directory
The JupyterLab installation guide on github says that: "If installing using pip install --user, you must add the user-level bin directory to your PATH environment variable in order to launch jupyter lab"
But I don't what that means, I greatly appreciate any help. I am using Ubuntu 18.04
As said by the guide itself you need to add the user-level bin directory to your PATH environment variable, in order to do so you need at first spot which is the bin folder where Jupyter lab has been installed, and after that you can add that path with a simple command:
export PATH=$PATH:/path/to/your/jupyterlab/bin/directory
and it's done. You can check if you added it by running this other command:
echo $PATH
And you should see the content of PATH variable.
This method though will just add that variable for the current shell, meaning that when you close the terminal you lose the change in the variable. In order to make it permanent you need to edit another file which is ~/.bashrc.
One thing though, it's really important that you just add this line to the file:
PATH=$PATH:/path/to/your/jupyterlab/bin/directory
without changing all the rest of the file if you don't know what you are doing.
To give you a recap on what to do to make it permanent open a new shell and type:
gedit ~/.bashrc
This will open the file where you need to add the "export PATH...etc" command right at the end of the file in a new line. Then save the changes and reboot, from now on you should be able to open Jupyter lab directly from a shell with the command:
Jupyter lab
I try to open terminal in XFCE and activate python3 virtualenv using the following line in a bash script:
xfce4-terminal --working-directory=$HOME/path/to/project --maximize \
-e 'bash -c "source $HOME/path/to/project/venv/bin/activate; bash"'
The strange thing is that the virtualenv gets kind of activated since:
which python
shows the correct path to the virtualenv directory and the project seems to be working fine.
However I don't see the (venv) to the left from the shell prompt. Moreover, when I enter deactivate it complains that no such command can be found.
Is there a proper way to solve this problem?
I created a bash shortcut for this in my /Users/username/.bash_profile (I use mac; on linux use Users/username/.bashrc instead).
function pcd() {
cd /Users/username/Code/"$1"_env/"$1"
source ../env/bin/activate
atom -a .
}
Where project_env is the root folder, which contains the venv, and the project folders (project folder is where code goes)
to execute this simply call pcd project
I don't know much about bash, so I can't really tell you why your code doesn't work.
Also, make sure you open a new terminal window after saving this.
-bash: /usr/local/bin/python3: No such file or directory
virtualenvwrapper.sh: There was a problem running the initialization hooks.
If Python could not import the module virtualenvwrapper.hook_loader,
check that virtualenvwrapper has been installed for
VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python3 and that PATH is
set properly.
The error comes from a broken installation of virtualenvwrapper. It seems you've installed virtualenvwrapper using /usr/local/bin/python3 but later removed that python.
The error comes from ~/.bashrc. Edit it, search for something like source virtualenvwrapper_lazy.sh or . virtualenvwrapper.sh and comment out or remove the line.
1. Check virtualenvwrapper is installed.
2. Open your .bashrc file.
3. Run the below commands:
export WORKON_HOME=$HOME/.virtualenv
source /usr/local/bin/virtualenvwrapper.sh
workon <virtual_env_name_of_your_choice>
which python
4. Check the python version.
5. If you want to change the python of your virtualenv, then follow the steps below:
vi .bashrc or vi .zshrc
alias python=python3
6. Open a new terminal.
which python
workon
which python
You are all set with virtualenv set to python3 by default.
I am working on a Windows (10) environment using command prompt. I created a project directory here c:\users\myproject. In command prompt, I type
C:\users\myproject>mkvirtualenv myenv .
virtuanenv "." already exists
If I leave out the "." at the end of the command, it creates a virtual environment in C:\users\Envs\ directory.
How do I create a virtual environment in my project directory itself?
You have to set the WORKON_HOME environment variable name and value.
The name is simply: WORKON_HOME
The value is the path where you want your virtual env directory to be created when you type mkvirtualenv venv
"venv" above is nothing special; it's just a name you choose. If you don't specify the WORKON_HOME variable, when you run mkvirtualenv venv on Windows, a directory named %USERPROFILE%\Envs where %USERPROFILE% translates to C:\Users\your.name.
See my more verbose, step-by-step answer here.
On Linux and MacOS I use the following command:
mkvirtualenv -a [full path to directory] [name of project]
I am not sure if this is the same for Windows but please give it a try and let me know.
In your example it would be:
mkvirtualenv -a C:\users\myproject myenv