unable to install rospy-builder in my own project

[jbcpollak]

I'd like to start building ROS message types in my own project, but when I try and install rospy-builder, I get this error:

(env) $ pip install --extra-index-url https://rospypi.github.io/simple/ rospy-builder
Looking in indexes: https://pypi.org/simple, https://rospypi.github.io/simple/
Collecting rospy-builder
  Downloading https://github.com/rospypi/simple/raw/any/rospy-builder/rospy_builder-0.5.0-py2.py3-none-any.whl (7.3 kB)
Requirement already satisfied: click in ./env/lib/python3.7/site-packages (from rospy-builder) (7.0)
Requirement already satisfied: gitpython in ./env/lib/python3.7/site-packages (from rospy-builder) (3.0.5)
Requirement already satisfied: setuptools in ./env/lib/python3.7/site-packages (from rospy-builder) (49.6.0)
Requirement already satisfied: catkin-pkg in ./env/lib/python3.7/site-packages (from rospy-builder) (0.4.22)
ERROR: Could not find a version that satisfies the requirement dataclasses<1,>=0.7 (from rospy-builder) (from versions: 0.1, 0.2, 0.3, 0.4, 0.5, 0.6)
ERROR: No matching distribution found for dataclasses<1,>=0.7 (from rospy-builder)

I am running Python 3.7.8

(env) $ cat .python-version 
3.7.8

I see in my checked out copy of this repo that rospy-builder/setup.py has this code:

if sys.version_info < (3, 7):
    install_requires.append("dataclasses>=0.7,<1")

so I'm a bit confused. Is the version uploaded to pypi outdated?

Thanks!

[otamachan]

Thank you for your report!

It seems the wheel package does not include conditional dependency well if I describe like this.

if sys.version_info < (3, 7):
    install_requires.append("dataclasses>=0.7,<1")

I fixed this in #35 so that it complies with PEP 508.

Could you use the pre released package or source package for now?

pip install --extra-index-url https://rospypi.github.io/simple/_pre rospy-builder

or

pip install --extra-index-url https://rospypi.github.io/simple --no-binary rospy-builder rospy-builder

[jbcpollak]

Hi this command worked for me, thanks!

pip install --extra-index-url https://rospypi.github.io/simple/_pre rospy-builder