tabs and the Python3 console

[Laura Creighton]

I have the debian version of python3 installed here.

Python 3.4.2 (default, Nov 13 2014, 07:01:52) 
[GCC 4.9.2] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> 

But I cannot seem to type a tab here:

>>> def fn(**kw):
...

(I type a tab here, and get a beep.  If I type a tab again I get:

Display all 178 possibilities? (y or n)
ArithmeticError(            chr(
AssertionError(             class
AttributeError(             classmethod(
BaseException(              compile(
BlockingIOError(            complex(
BrokenPipeError(            continue
<lots more skipped, because you get the idea>
...

Do I need a python3 enabled with readline support, or something?

Thanks very much,
Laura Creighton