Horizon installation problem

Jeremy Stanley fungi at yuggoth.org
Fri Aug 28 16:11:25 UTC 2020

On 2020-08-28 12:33:07 +0430 (+0430), mahdi abbasi wrote:
> When i want install horizon with pip3 i recieve and error:
> Could not satisfy constraints for horizon: installation from path or url
> cannot be constrained to a version.

This sounds like you're passing a -c option to pip telling it to
apply a constraints file, but you're attempting to install Horizon
from source instead of from a released package so it can't be
matched against the constraints list. The easy workaround is to
delete the Horizon entry from the constraints list you're using, or
consume a release of Horizon from PyPI instead of using a source
Jeremy Stanley
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