pip install -r requirements.pip fail

[huzhenjie]

Can't roll back Pillow; was not uninstalled
Cleaning up...
Command /usr/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip_build_root/Pillow/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-ZpK1R6-record/install-record.txt --single-version-externally-managed --compile failed with error code 1 in /tmp/pip_build_root/Pillow
Storing debug log for failure in /home/huzhenjie/.pip/pip.log

[ChiChou]

Looks like you've already installed Pillow.

Have you tried running the script directly?