Rather than re-use globals of setuptools.launch, build a unique namespace in which to launch the script. Prevents imports from occuring relative to 'setuptools' on Python 2. Ref #490.
Rather than re-use globals of setuptools.launch, build a unique namespace in which to launch the script. Prevents imports from occuring relative to 'setuptools' on Python 2. Ref #490.

pypa/setuptools,pypa/setuptools,pypa/setuptools