Message10853

I'm using; 
java 1.8 64-bit
python 3.5
jython 2.7
I have java methods needed to be reached from a python file. This is why I am using jython. And, I need to use a python debugger from java executor. Therefore, I'm creating a java process with the command "jython -m pdb script.py". 
Jump command is a critical command for my usage. However, it does not work. "TypeError: readonly attribute" error is given at line 705 in jython\lib pdb.py file, which is "self.curframe.f_lineno = arg".