How do I suppress tracebacks in Jupyter?

Question

I want to hide tracebacks in my Python code in Jupyter notebooks, so only the error type and message are displayed.

This answer suggests sys.tracebacklimit = 0 but trying that gave the following:

ERROR:root:Internal Python error in the inspect module.
Below is the traceback from this internal error.

ERROR:root:Internal Python error in the inspect module.
Below is the traceback from this internal error.

Traceback (most recent call last): 
AssertionError 
Traceback (most recent call last): 
AssertionError

That answer also suggests replacing sys.excepthook with a custom function, but the traceback was still displayed.

How can I hide the traceback?

Answer 1

I have found a couple ways to do this, both involving monkeypatching IPython.

#1. This will output just the exception type and message but highlighted in red in the output area:

from __future__ import print_function  # for python 2 compatibility
import sys
ipython = get_ipython()

def exception_handler(exception_type, exception, traceback):
    print("%s: %s" % (exception_type.__name__, exception), file=sys.stderr)

ipython._showtraceback = exception_handler

#2. This will output the exception and color code the exception type (just like Jupyter normally does, but without the traceback):

import sys
ipython = get_ipython()

def hide_traceback(exc_tuple=None, filename=None, tb_offset=None,
                   exception_only=False, running_compiled_code=False):
    etype, value, tb = sys.exc_info()
    value.__cause__ = None  # suppress chained exceptions
    return ipython._showtraceback(etype, value, ipython.InteractiveTB.get_exception_only(etype, value))

ipython.showtraceback = hide_traceback