Installing virtualenv and virtualenvwrapper
If you are working on many projects simultaneously, or even just switching between them frequently, you'll find that having everything installed system-wide is not the best option and can bring problems in future on different systems (production) where you want to run your software. This is not a good time to find out that you are missing a certain package or you're having versioning conflicts between packages that are already installed on production system; hence, virtualenv.
virtualenv is an open source project started by Ian Bicking that enables a developer to isolate working environments per project, for easier maintenance of different package versions.
For example, you inherited legacy Django website ...
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