Starting IPython - Attribute Error: 'module' object has no attribute 'error'

I tried to search a lot online to find if somebody had the same issue. But I don’t find anything with this problem.

Whenever I type ipython in my terminal, it ends up with the following error, and terminal won’t go back to prompt. Jupyter-notebook works fine. Spyder is launching fine. Python interpreter has no issues. It is only with IPython.

$  ipython
Python 2.7.11 |Anaconda custom (64-bit)| (default, Dec  6 2015, 18:08:32) 
Type "copyright", "credits" or "license" for more information.

IPython 5.1.0 -- 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]: Exception in thread Thread-1:
Traceback (most recent call last):
  File "/home/as/anaconda2/lib/python2.7/threading.py", line 801, in __bootstrap_inner
    self.run()
  File "/home/as/anaconda2/lib/python2.7/threading.py", line 754, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/home/as/anaconda2/lib/python2.7/site-packages/prompt_toolkit/eventloop/inputhook.py", line 66, in thread
    input_is_ready_func(wait=True)
  File "/home/as/anaconda2/lib/python2.7/site-packages/prompt_toolkit/eventloop/posix.py", line 101, in ready
    return self._ready_for_reading(current_timeout[0] if wait else 0) != []
  File "/home/as/anaconda2/lib/python2.7/site-packages/prompt_toolkit/eventloop/posix.py", line 184, in _ready_for_reading
    r, _, _ =_select(read_fds, [], [], timeout)
  File "/home/as/anaconda2/lib/python2.7/site-packages/prompt_toolkit/eventloop/posix.py", line 279, in _select
    except select.error as e:
AttributeError: 'module' object has no attribute 'error'

• The only recent change I made on my machine is, as far as I could remember, installing PyDev plugins for Eclipse and configuring interpreters there with Jython.
• And I installed R along with IRKernel for Jupyter-notebook. That works fine too.

Please help.

[takluyver]

Great, glad you got it solved.

For future reference, this probably came about when you had prompt_toolkit installed by conda, and something you did with pip installed a newer version over it. They don’t always play well together. It’s ideal to remove a package with one before trying to install it with the other, but with dependencies, that’s not always possible.

[takluyver]

Do you have a file called select.py or select/__init__.py in the working directory? If so, it’s clashing with a standard library module.