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?
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
what about
import functools
ipython = get_ipython()
method_name = "showtraceback"
setattr(
ipython,
method_name,
functools.partial(
getattr(ipython, method_name),
exception_only=True
)
)
I think the xmode
magic is what you are looking for here. Just type it in a cell. There are four modes: Context, Minimal, Verbose and Plain(the default I think). you can either use xmode <mode>
or with no argument it toggles to the next mode.
In [1]: %xmode
Exception reporting mode: Minimal
In [2]: %xmode
Exception reporting mode: Plain
Here is the difference with a simple error. It becomes easier to see the differences with more detailed error messages.
xmode Minimal
x = 6 / 0
returns
ZeroDivisionError: division by zero
xmode plain
x = 6 / 0
Traceback (most recent call last):
File "<ipython-input-187-28f66aec0cca>", line 2, in <module>
x = 6/0
ZeroDivisionError: division by zero
xmode Context
---------------------------------------------------------------------------
ZeroDivisionError Traceback (most recent call last)
<ipython-input-188-8224aeca2117> in <module>
1 get_ipython().run_line_magic('xmode', 'Context')
----> 2 x = 6/0
ZeroDivisionError: division by zero
xmode vErboSe
---------------------------------------------------------------------------
ZeroDivisionError Traceback (most recent call last)
<ipython-input-189-8fc1397d2e40> in <module>
1 get_ipython().run_line_magic('xmode', 'Verbose')
----> 2 x = 6/0
global x = ['a', 'b', 'c', 'd']
ZeroDivisionError: division by zero
I realize this question was asked a long time ago, but I expect others may land here and after searching stack exchange forever and never posting, I thought I would give back. I expect some etiquette flames. Be gentle and I will know better next time!
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