No module named 'sym' when installing with cmake

[arbor-arthur]

No module named 'sym' when installing with cmake

[aaron-skydio]

These lines:

symforce/dev_requirements.txt

Lines 327 to 328 in 84f76b6

	file:./gen/python
	# via symforce (setup.py)

The sym python package is pure-python, and is the same as the symforce-sym package on PyPI, you could install it from PyPI instead if you aren't modifying it. It's the generated python numerical geometry and camera types

[aaron-skydio]

I tried installing the public pip sym package, but that seemed like an entirely different package than the one used here. It didn't have a Rot2 or other Lie group types for example.

If you tried installing this package, that's not ours - this one should be what you want

[aaron-skydio]

I also tried pip install -r dev_requirements.txt and then had some other errors come up. I probably could have avoided those by using a virtual environment, but I wanted to install symforce system-wide.

This is a good point, we should have a way to install the minimal unpinned dependencies required for a from-source build for use cases like this. It's really unfortunate that pip doesn't have a way to install just the dependencies of a package, but it doesn't

[aaron-skydio]

Did you pip install -r dev_requirements.txt first? That should install sym

[arbor-arthur]

Which pip package in dev_requirements.txt provides sym? I don't see a package named sym listed there? I thought the sym package was an internal module exposing the C++ part of symforce.

I tried installing the public pip sym package, but that seemed like an entirely different package than the one used here. It didn't have a Rot2 or other Lie group types for example.

I also tried pip install -r dev_requirements.txt and then had some other errors come up. I probably could have avoided those by using a virtual environment, but I wanted to install symforce system-wide.