setup.py should not import pyscreeze

[SpotlightKid]

setup.py imports pyscreeze to get the version info. This then fails if the dependency PIL (Pillow) is not already installed when setup.py is run (which may be by pip).

Solution: put version info (and optionally any other distribution metadata) in an extra module file (e.g. version.py, release.py or metadata.py) and do not import it, but read it with:

data = {}
version_info = 'pyscreeze/version.py'
exec(compile(open(version_info).read(), version_info, 'exec'), {}, data)
version = data['__version__']

BTW, from pyscreeze.version import __version__ as version does also not work, since this will implicitly import pyscreeze/__init__.py.

This also prevents the possible problem where setup.py is run with an already installed version of pyscreeze and the version info is read from the installed package, rather from the directory, from which setup.py is run.

[tonygrue]

Hitting this issue when doing 'pip install -r requirements.txt' with a requirements.txt that includes pyautogui (which is dependant on pyscreeze); even when pillow is first listed in the requirements.txt. If I first 'pip install pillow' then install from my requirements.txt I can work around it.

[RattleyCooper]

No idea how to work around this. Trying to install pyautogui, and it fails when trying to install pyscreeze due to the from PIL import Image that is ran. Can't install pyautogui or pyscreeze due to this issue.

Just trying a simple pip install pyautogui.

[divick]

@Wykleph : Installing pillow before installing pyautogui makes it work.

[RattleyCooper]

@divkis01, I did try this when I was troubleshooting, however it did not work. I ended up giving up on this particular library, so I don't have any more information to provide.