Skip to content

virtualenv.md

Latest commit

 

History

History
43 lines (37 loc) · 2.06 KB

virtualenv.md

File metadata and controls

43 lines (37 loc) · 2.06 KB
Raw

virtualwrapper

virtualwrapper is a set of extensions for the virtualenv tool. It makes it easier to work with virtualenv.

virtualenv this is just another way to create a virtual environment. The alternative is to use conda. Creating a virtual environment using virtualenv is desirable if you are working on a server where it would be infeasible to install Anaconda.

Installing virtualenvwrapper:

Common commands

  • mkvirtualenv: create a new virtualenv
  • lsvirtualenv: -b option gives brief list of all virtualenv, -l for long
  • rmvirtualenv: remove an existing virtualenv
  • workon: change the current virtualenv
  • add2virtualenv: add external packages in a .pth file to current virtualenv
  • cdsitepackages: cd into the site-packages directory of current virtualenv
  • cdvirtualenv: cd into the root of the current virtualenv
  • deactivate: deactivate virtualenv, which calls several hooks

Installing from requirements.txt file

  • requirements.txt contain libraries needed for project
  • Example contents without version specifiers
nose
nose-cov
beautifulsoup4
  • Example with version specifiers
docopt == 0.6.1             # Version Matching. Must be version 0.6.1
keyring >= 4.1.1            # Minimum version 4.1.1
coverage != 3.5             # Version Exclusion. Anything except version 3.5
Mopidy-Dirble ~= 1.1        # Compatible release. Same as >= 1.1, == 1.*
  • Command to install from requirements pip install -r requirements.txt

Check if inside a virtual environment

python -c 'import sys; print("In virtuaenv" if hasattr(sys, "real_prefix") else "Not in virtenv")'

Location of virtualenvironments

  • /Users/palermospenano/.virtualenvs