uvloop.__version__ isn't set

[MarkReedZ]

__init__.py should set the version though the following can be done to get the version:

import pkg_resources
pkg_resources.require("uvloop")[0].version

[kxepal]

Not really. pkg_resources gets all the information from package metadata directories (.egg-info or .dist-info). If you install uvloop correctly (via pip), then it will works as expected.

$ pip install uvloop
Collecting uvloop
  Downloading uvloop-0.9.1-cp36-cp36m-manylinux1_x86_64.whl (3.2MB)
    100% |████████████████████████████████| 3.2MB 451kB/s 
Installing collected packages: uvloop
Successfully installed uvloop-0.9.1
$ python
Python 3.6.5 (default, Apr  8 2018, 11:23:52) 
[GCC 7.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import pkg_resources
>>> pkg_resources.require("uvloop")[0].version
'0.9.1'
>>> type(pkg_resources.require("uvloop")[0])
<class 'pkg_resources.DistInfoDistribution'>
>>> 

[MarkReedZ]

I may have worded that wrong, but python states you should make the version number available in version which I don't think is set by uvloop.

[asvetlov]

IMHO Python never states it.
But very many distros (not all) have __version__ attribute in top level package.

[kxepal]

__version__ thing is just an agreement the same as __author__, __revision__ and the rest of those. These has no effect nor special meaning. However, version in package metadata matters since all the managers (pip, setuptools, pipenv) will use it for their work. Which makes it's more reliable source of truth than some custom module attribute.

The main problem with __version__ attribute is a chicken and egg one. You need package version to install the package, but you can't get package version without install it. So you have to found yourself to do import hacks (install-without-install) or doing regexp parsing. Not quite cool nor reliable ways to go just to achieve...what?

[1st1]

What's the actual intent behind checking __version__? Ideally you should never depend on it in your source code.

[sakurai-youhei]

FYI: Mine is reliable & straightfoward version check by python -c 'import uvloop; print(uvloop.__version__)' rather than querying pip.