ipython tab completion causing side effects when reading descriptors

I have a test class which, when tab completed from an interactive terminal, causes side effects. Test class and descriptor:

class TestDescr():

    def __get__(self, obj, objtype):
        print("Side effects!")
        return 1

    def __set(self, obj, value):
        raise AttributeError("Error, read only attribute")

class TestClass():
    td = TestDescr()

Below is a copy of an ipython interactive session: (tried on pip version and master version)

> python __main__.py
Python 3.6.1 |Anaconda custom (64-bit)| (default, Mar 22 2017, 20:11:04) [MSC v.1900 64 bit (AMD64)]
Type 'copyright', 'credits' or 'license' for more information
IPython 6.0.0 -- An enhanced Interactive Python. Type '?' for help.

In [1]: cd ../../
c:\projects\mban_fpga_eval_fw_test

In [2]: %run test_file.py

In [3]: tc = TestClass()

Side effects!
Side effects!
In [4]: tc.td

Just to explain, when I type: tc. and then press tab, Side effects! is then printed twice.

I have tried this with Ipython version 5.3 with no such issues:

> ipython
Python 3.5.0 (v3.5.0:374f501f4567, Sep 13 2015, 02:27:37) [MSC v.1900 64 bit (AMD64)]
Type "copyright", "credits" or "license" for more information.

IPython 5.3.0 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.

In [1]: %run test_file.py
ERROR:root:File `'test_file.py'` not found.

In [2]: cd ..
c:\projects\mban_fpga_eval_fw_test

In [3]: %run test_file.py

In [4]: tc = TestClass()

In [5]: tc.td

[wolkenarchitekt]

Upgrading Jedi to 0.11 solved the problem for me

[MrMino]

This was fixed in jedi.