Python 3.4 caused type function error

Question

I am a fresher in python.I had python 2.7 and 3.4.When I compile python 3.4 I get the following error but not in 2.7

File "C:\pyprojects\focus\site\focus2\flow.py", line 24, in _wrapper
    cls._meta = type("Meta", (), BaseFlowTile.Meta.__dict__)
TypeError: type() argument 3 must be dict, not mappingproxy

If I just use dict instead __dict__ then I get the following error

AttributeError: type object 'Meta' has no attribute 'dict'

Any help is highly appreciated.

Very sorry , i read it the wrong way! – Ubdus Samad Aug 05 '17 at 14:57 — Ubdus Samad, Aug 05 '17 at 14:57
I have changed the title and the post too.Hope it helps. – Prithviraj Mitra Aug 05 '17 at 14:59 — Prithviraj Mitra, Aug 05 '17 at 14:59

score 1 · Accepted Answer · answered Aug 05 '17 at 16:09

1

Python 3.3 introduced a MappingProxyType, that basically allowed some optimizations.

You should be able to use a copy of this for both Python versions:

cls._meta = type("Meta", (), BaseFlowTile.Meta.__dict__.copy())

answered Aug 05 '17 at 16:09

Gerrat

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@PrithvirajMitra: It did take a bit to track down - it's always a pleasure to come across an interesting (uncommon) question like yours. – Gerrat Aug 05 '17 at 16:27

Python 3.4 caused type function error

1 Answers1