AttributeError when using self.__class__

[eliasdorneles]

It looks like the common idiom self.__class__ doesn't work with VOC classes.

Steps to reproduce:

Create a file testclass.py with the following code:

class Hello:
    def hello(self):
        print('hello, from class %s' % self.__class__.__name__)

Hello().hello()

Expected behavior:

$ python testclass.py 
hello, from class Hello

However, this is what you get using VOC:

$ voc -v testclass.py
Compiling testclass.py ...
Adding default main method...
Writing ./python/testclass/__init__.class ...
Writing ./python/testclass/Hello.class ...
$ java -cp ../voc/dist/python-java-support.jar:. python.testclass.__init__
Exception in thread "main" AttributeError: 'Hello' object has no attribute '__class__'
	at org.python.types.Object.__getattribute__(Object.java:288)
	at python.testclass.Hello.hello(testclass.py:3)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.python.types.Function.invoke(Function.java:391)
	at org.python.types.Method.invoke(Method.java:48)
	at python.testclass.__init__.module$import(testclass.py:5)
	at python.testclass.__init__.main(testclass.py)

Environment details:

$ javac -version
javac 1.8.0_121
$ python --version
Python 3.4.4

[eliasdorneles]

I was looking into fixing this adding @org.python.Attribute to the __class__attribute of Object.

After doing that, I tried executing the following code:

class MyClass:
    pass

print(MyClass().__class__)
print(MyClass().__class__.__name__)

And this time, the output is still not the expect, but it's a bit more interesting:

+ java -cp ../voc/dist/python-java-support.jar:. python.testclass.__init__
<class 'MyClass'>
__main__

The expected would be:

$ python testclass.py 
<class '__main__.MyClass'>
MyClass

So, for some reason, getting the name attribute for a class ends up being __main__, but not sure if it's a bug on setting the attribute or getting it. :)

[hashimshafiq]

I am starting work on this issue.

[hashimshafiq]

Why It is not adding default main method as clearly seen in your output. ?

[niconorsk]

The above code exposes class and sets name correctly for classes

It fails on this however:

E   - <class 'test.MyClass'>
E   ?         ^^^^
E   + <class '__main__.MyClass'>
E   ?         ^^^^^^^^
E     MyClass
E     ===end of test===
E    : Global context

The type is not setting module to main when it is being run as such. Have yet been able to figure out exactly how to do that though.