Protobuf Issue

[nmaas87]

Dear all,
I think there is an issue with the requirements for python-yamcs-client:

python-yamcs-client/yamcs-client/setup.py

Line 41 in d22f06f

"protobuf>=3.8,<4",

The current protobuf history cannot satisfy these requirements, there is no version "protobuf>=3.8,<4" - only 3.20.3 and then some 4.0.0rc versions and up...

https://pypi.org/project/protobuf/#history

[fqqb]

but 3.20.3 matches that specification doesn't it?
are you getting a specific error? Maybe some conflict with another dependency?

[nmaas87]

Yeah, pip3 gave me following error, while trying to install if offline on another machine:

Could not find a version that satisfies the requirement protobuf<4,>=3.8 (from yamcs_client->-r requirements.txt (line 1)) (from versions: )
No matching distribution found for protobuf<4,>=3.8 (from yamcs_client->-r requirements.txt (line 1))

You're right, I mixed up the versioning schema, so it turned out that the machine I downloaded the pip packages with was a Debian 11 with python 3.9 - and the one I tried to play the packages back was a Debian 10 with python 3.7 - so what happend was that it had downloaded the protobuf-3.20.3-cp39-cp39-manylinux_2_5_x86_64.manylinux1_x86_64.whl wheel which did not install on the offline machine - and hence the error came up.

I got around it by creating a own download for the protobuf repo and forced it to use python 3.7.x as target system:

requirements_protobuf.txt
protobuf==3.20.3

pip3 download --python-version "37" --only-binary=:all: -r requirements_protobuf.txt

Then i offline installed protobuf before all the rest

pip3 install --no-index --find-links ./ -r requirements_protobuf.txt

... and with that the error was gone and the yamcs python api successfully installed.

Sorry for the confusion! :)