Hi
I'm building a generic editor for creating loading and saving gpb
objects and am running into problems with dynamic __import__
statements. I've nailed it down to a very simple testcase. This is all
with python 2.5.2 and protobuf 2.0.3 on Linux.
test.proto:
message test { optional int32 x=1; }
C.py:
class K:
def __init__(self):
print "new K"
>>> import test_pb2, C
>>> a=getattr(test_pb2,"test")
>>> a
<class 'test_pb2.test'>
>>> b=getattr(C,"K")
>>> b
<class C.K at 0xb64ceddc>
Why is one of the classnames in quotes, and the other not?
When I try a dynamic import I've narrowed my problem down to :
#!/usr/bin/python
def test():
for module,klass in [('test_pb2','test'), ('C', 'K')]:
m=__import__(module)
k=getattr(m, klass)
print "*", m, k, type(k)
print k()
test()
Which when run gives me the following
* <module 'test_pb2' from '....gpbedit/test_pb2.pyc'> <class
'test_pb2.test'> <class
'google.protobuf.reflection.GeneratedProtocolMessageType'>
new k=
* <module 'C' from '...gpbedit/C.pyc'> C.K <type 'classobj'>
new k= new K
<C.K instance at 0xb7d2764c>
When I try to create a protocol object of the 'test' type, my python
script returns None.
So where does this go wrong?
Bart
P.S. the editor is at http://github.com/bvdeenen/gpbedit/tree/master.
It's still alpha quality, but it is capable of editing proto objects
and generating a gui from proto files
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