Quick Reference

Tutorial ButtonHaving trouble with the mission? Read how to get help.

Quick Reference

Installation instructions

Installing pip and virtualenv along with all of what they depend on
can be hard at times, so we recommend that you follow the installation
instructions given
here
.

pip commands

To install a package, type pip install foo where
foo is the name of the package you want to install.

To uninstall a package, type pip uninstall foo where
foo is the name of the package you want to uninstall.

To get a list of all of the Python packages currently installed in your
environment, use the pip freeze or pip list commands.

You can also search the PyPI for
packages. For instance, to search for all packages that contain the string “http”
in their name(or description), type:

pip search http

If you find yourself installing the same packages frequently in virtualenvs
and don’t want to wait for pip to download the package again for each separate
install, type pip wheel foo before pip install foo
to get extra-fast installs.

virtualenv/virtualenvwrapper commands

You can use the mkvirtualenv command to create a virtualenv, like
so:

mkvirtualenv FooEnv

where FooEnv is the name of the virtualenv(which can be
anything you like).

To get out of a virtualenv, simply type deactivate at the terminal.

To activate a virtualenv that has already been created, type workon
followed by the name of the virtualenv that you wish to activate, like so:

mkvirtualenv TestEnv

You can delete a virtualenv by typing rmvirtualenv FooEnv
at the terminal, where FooEnv is the name of the virtualenv
that you wish to delete.

To list all of the virtualenvs that you have created so far, simply type
lsvirtualenv at the terminal.

Other resources

If you wish to learn more about the tools covered in this mission, we recommend
that you take a look at the following additional resources: