Any six, with_metaclass and DeviceMeta example

# 7 years ago
nleclercq	Hi all; I'm porting some code to python 3 using six. One problem remain with de python devices trying to make use of six's "with_metaclass". I tried the following: `class MyDevice(with_metaclass(DeviceMeta, Device)):` but got this error: `File "…/python2.7/site-packages/six-1.10.0-py2.7.egg/six.py", line 805, in with_metaclass class metaclass(meta): TypeError: Error when calling the metaclass bases function() argument 1 must be code, not str` Whats' wrong? I did the same with some of my own classes and it works perfectly. Thanks. Edited 7 years ago

# 7 years ago

Hi all;
I'm porting some code to python 3 using six. One problem remain with de python devices trying to make use of six's "with_metaclass".
I tried the following:

class MyDevice(with_metaclass(DeviceMeta, Device)):

but got this error:

File "…/python2.7/site-packages/six-1.10.0-py2.7.egg/six.py", line 805, in with_metaclass
    class metaclass(meta):
TypeError: Error when calling the metaclass bases
    function() argument 1 must be code, not str

Whats' wrong? I did the same with some of my own classes and it works perfectly.

Thanks.

Edited 7 years ago

# 7 years ago
Vincent M	Hi Nicolas, In the pytango unit-tests, we've been successfully using six.add_metaclass: `@six.add_metaclass(DeviceMeta) class MyDevice(Device): […]` Does that work for you? Also, defining the metaclass won't be necessary any more after PR #90 is merged. This change will become visible with pytango-9.2.1 release.

# 7 years ago
Andy	Hi Nicolas, I confirm what Vincent says. He helped me with this as described in this issue: https://github.com/tango-controls/pytango/issues/88 I used both methods for python3 successfully - and I am a beginner ! Andy

# 7 years ago
nleclercq	Hi guys, Vincent M Does that work for you? It does. Thanks for your replies.