Support pycairo 1.17.0's equivilent of PycairoContext_FromContext

[dreerr]

Dear all,

I updated my Python install to 2.7.15 and created a new virtualenv for shoebot to test it. The diagnose comes up with the following:

import gi                   [success] : [...]
import gi.repository.Pango  [success] : [...]
import pgi                  [failed]
import vext                 [success] : [...]
import pubsub               [success] : [...]
import meta                 [success] : [...]
import shoebot              [success] :[...]
shoebot - standard module example:
Traceback (most recent call last):
[...]
File "/usr/local/Cellar/python@2/2.7.15/Frameworks/Python.framework/Versions/2.7/lib/python2.7/ctypes/__init__.py", line 384, in __getitem__
    func = self._FuncPtr((name_or_ordinal, self))
AttributeError: dlsym(0x7fc8dd1ba740, PycairoContext_FromContext): symbol not found
[failed]

Any idea how to solve this? Never had this error before. My pip freeze looks good to:

cairocffi==0.7.2
cffi==1.11.5
fuzzywuzzy==0.5.0
meta===-
numpy==1.14.3
Pillow==5.1.0
planar==0.4
pubsub==0.1.1
pycparser==2.18
PySoundCard==0.5.2
ruamel.ordereddict==0.4.13
ruamel.yaml==0.15.37
shoebot==1.2.2
vext==0.7.0
vext.gi==0.6.8

Thank you for your help!

[stuaxo]

I've hit a lot of issues around PycairoContext_FromContext over the years.
I can't look at it now, but will have a look later.

You can try various combinations of installing / uninstalling cairocffi and pycairo.

I would try the latest versions of both first and see if it helps.

[dreerr]

Sadly no combination worked out yet. Also changing back to Python 2.7.14 didn‘t help. Any other direction you could point me in?

EDIT: got it to work with pip install pycairo==1.16.3 so everything back to normal!

[stuaxo]

I @dreerr does it work with pycairo 1.16.3 and die with newer ones like 1.17 ?

If that's the issue, it may be an issue on pycairo, and I'd like to be able to isolate it (I'm glad it's fixed for you, but I've seen this tricky bug come up before).

[dreerr]

I checked now to be sure and 1.17.0 is not working, while 1.16.3 is working

[stuaxo]

Upstream bug - pygobject/pycairo#113

[stuaxo]

The solution in this thread needs to be implemented ..

pygobject/pycairo#59 (comment)

No reason we can't support both until 1.17.0 is old enough to be everywhere.

[stuaxo]

Should be fixed in master.