IDLE in a Virtual Environment4:08 with Kenneth Love
Using tools like IDLE in a virtualenv isn't as straightforward as it should be. I'll show you how to launch it so your custom project packages are available and how to use a requirements file to quickly build up an environment.
You can always get a list of installed packages with
pip freeze. If you're in a virtualenv, you'll get the virtualenv's list of packages. If you're not, you'll get a list of your global packages.
pip freeze > requirements.txt is the fast way to generate your requirements file the first time.
Requirements files always have the same layout:
package_name==1.2.3. You can also use
>=, too (e.g.
Django>=1.9,<2.0 would select the latest version of Django that's newer than, or equal to, 1.9 and less than 2.0).
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