Hack to fix python dependency ranges (#3938)

var/spack/repos/builtin/packages/cmor/package.py

var/spack/repos/builtin/packages/cosmomc/package.py

var/spack/repos/builtin/packages/espressopp/package.py

var/spack/repos/builtin/packages/julia/package.py

var/spack/repos/builtin/packages/node-js/package.py

var/spack/repos/builtin/packages/paraview/package.py

var/spack/repos/builtin/packages/petsc/package.py

var/spack/repos/builtin/packages/py-autopep8/package.py

...packages/py-backports-shutil-get-terminal-size/package.py

var/spack/repos/builtin/packages/py-bleach/package.py

var/spack/repos/builtin/packages/py-configparser/package.py

var/spack/repos/builtin/packages/py-dill/package.py

.../repos/builtin/packages/py-easybuild-framework/package.py

var/spack/repos/builtin/packages/py-enum34/package.py

var/spack/repos/builtin/packages/py-flake8/package.py

var/spack/repos/builtin/packages/py-html5lib/package.py

var/spack/repos/builtin/packages/py-ipdb/package.py

var/spack/repos/builtin/packages/py-ipykernel/package.py

...ack/repos/builtin/packages/py-ipython-genutils/package.py

var/spack/repos/builtin/packages/py-ipython/package.py