How to execute a command from a virtual environment using `crontab` or `gnome-terminal`

Question

When I want to work on a virtual environment with virtualenv(1.8.2) and virtualenvwrapper(3.6) I just run workon my_project. I am however unable to execute a command from a virtual environment using crontab or gnome-terminal:

Examples:

* * * * * workon my_project && python task.py

This is'nt executed. (The task writes to a file)

or

gnome-terminal --tab -e "bash -c \"workon my_project;python task.py;exec bash\"" This just shows bash: workon: command not found and then executes the program from the system environment. Check here for more info about this command.

Edit

@Zaar Hai: To initiate virtualenvwrapper this in my /home/myusername/.bashrc:

export WORKON_HOME=~/.virtualenvs
source /usr/local/bin/virtualenvwrapper.sh
export PIP_VIRTUALENV_BASE=$WORKON_HOME
export PIP_RESPECT_VIRTUALENV=true

So I tried this command:

gnome-terminal --tab -e "bash -c \"export WORKON_HOME=~/.virtualenvs;source /usr/local/bin/virtualenvwrapper.sh;export PIP_VIRTUALENV_BASE=$WORKON_HOME;export PIP_RESPECT_VIRTUALENV=true;source /home/myusername/.virtualenvs/my_project/bin/activate;exec bash\""

But I still get that same output as I posted in your comment.

Answer 1

Through crontab:

0 10 * * * env -i bash -c 'export WORKON_HOME=~/.virtualenvs && source /usr/local/bin/virtualenvwrapper.sh && workon my_project && python task.py'

Through gnome terminal:

gnome-terminal --tab -e 'bash -c "export WORKON_HOME=~/.virtualenvs && source /usr/local/bin/virtualenvwrapper.sh && workon my_project && python task.py " '

Better of all just create a runme.sh script:

#/bin/sh
set -e
export WORKON_HOME=~/.virtualenvs
source /usr/local/bin/virtualenvwrapper.sh
workon my_project
exec python task.py

And run this script through gnome terminal / crontab.