Difference between installing and using virtualenv "globally from source" and using it "locally from source" -


https://pypi.python.org/pypi/virtualenv says

to install globally source:

$ curl -o https://pypi.python.org/packages/source/v/virtualenv/virtualenv-x.x.tar.gz $ tar xvfz virtualenv-x.x.tar.gz $ cd virtualenv-x.x $ [sudo] python setup.py install

to use locally source (and not insecure described in warning above):

$ curl -o https://pypi.python.org/packages/source/v/virtualenv/virtualenv-x.x.tar.gz $ tar xvfz virtualenv-x.x.tar.gz $ cd virtualenv-x.x $ python virtualenv.py myve

could please elaborate on differences between installing , using virtualenv globally , using locally (i under impression different running virtualenv --no-site-packages)? why using locally considered more secure?


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