Re: [gtk-osx-users] ImportError: No module named gi.

[John Ralls <jralls ceridwen fremont ca us>]

> On Mar 31, 2019, at 2:03 AM, Pascal <p p14 orange fr> wrote:
>
> > Le 31 mars 2019 à 04:53, John Ralls <jralls ceridwen fremont ca us> a écrit :
> >
> > > On Mar 30, 2019, at 10:55 AM, Pascal <p p14 orange fr> wrote:
> > >
> > > > Le 30 mars 2019 à 03:41, John Ralls <jralls ceridwen fremont ca us> a écrit :
> > > >
> > > > > On Mar 29, 2019, at 2:20 PM, Pascal <p p14 orange fr> wrote:
> > > > >
> > > > > Hello,
> > > > >
> > > > > I have install GTK+ 3 and Python with:
> > > > > $ jhbuild build python
> > > > >
> > > > > Then PyObject with:
> > > > > $ jhbuild build pygobject
> > > > >
> > > > > But I've the error: "ImportError: No module named gi"
> > > > >
> > > > > Where is it wrong?
> > > >
> > > > pygobject needs gobject-introspection. Build meta-gtk-osx-core-gtk3 instead of just gtk+-3.0.
> > > > Also you need python3 rather than python nowadays.
> > >
> > > Hello John,
> > >
> > > Sorry, my wording was incorrect.
> > > $ jhbuild build pygobject
> > > is built without any error.
> > > But I've got "ImportError ... gi" when running my app.
> > >
> > > Well, I built python3 and pygobject3 but I've got another error:
> > > $ jhbuild build python3
> > > $ jhbuild build pygobject3
> > > *** Building pygobject3 *** [4/4]
> > > python setup.py build
> > > Traceback (most recent call last):
> > > File "setup.py", line 29, in <module>
> > >  import pkg_resources
> > > ImportError: No module named pkg_resources
> >
> > Note that it calls python, not python3. Since you have built both (and maybe even if you hadn't) you need 
> > to link $PREFIX/bin/python3 to $PREFIX/bin/python, replacing the python2 link.
>
> Thanks John for the tip, I should have guess it on my own ;-)
>
> Now "jhbuild build pygobject3" is ok and I get "gi":
> /usr/local/xnadalib-2018/lib/python3.6/site-packages/gi
> $ jhbuild shell
> Prefix: /usr/local/xnadalib-2018
> Entered jhbuild shell, type 'exit' to return.
> [JH] bld$ python
> Python 3.6.4 (default, Mar 30 2019, 18:42:23) 
> [GCC 4.2.1 Compatible Apple LLVM 10.0.0 (clang-1000.11.45.5)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
> > > > from gi.repository import Gtk
> __main__:1: PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', 
> '3.0') before import to ensure that the right version gets loaded.
>
> But my app seems to expect python 2:
>    print 'PYTHON_VERSION=%s' % get_config_var("VERSION")
>                            ^
> SyntaxError: invalid syntax
>
> Does "gi" exist for python 2? How to get it?

Build pygobject3 with python2. pygobject is for Gtk2.

Python2 goes out of support at the end of *this year*. It's way past time that you covert your app to 
python3. It's not hard, most apps can be converted in a day or two.

Regards,
John Ralls