module 'logging' has no attribute 'Formatter'

[conradry]

I was working on a notebook and created a text file called logging.py for import. When I tried launching that notebook later, the kernel wouldn't start and I see this error in terminal. If I delete the text file or rename it, the problem disappears. Any idea what's going on? You should be able to reproduce the error with just an empty jupyter notebook and a text file called logging.py (see screenshot) in the same directory.

Here are the versions for jupyter, ipykernel, IPython, and traitlets:
jupyter 1.0.0 py37_7
ipykernel 5.1.1 py37h39e3cac_0
ipython 7.7.0 py37h39e3cac_0
traitlets 4.3.2 py37_0

Traceback (most recent call last):
  File "/Users/conradrw/anaconda3/lib/python3.7/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/Users/conradrw/anaconda3/lib/python3.7/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/Users/conradrw/anaconda3/lib/python3.7/site-packages/ipykernel_launcher.py", line 15, in <module>
    from ipykernel import kernelapp as app
  File "/Users/conradrw/anaconda3/lib/python3.7/site-packages/ipykernel/__init__.py", line 2, in <module>
    from .connect import *
  File "/Users/conradrw/anaconda3/lib/python3.7/site-packages/ipykernel/connect.py", line 13, in <module>
    from IPython.core.profiledir import ProfileDir
  File "/Users/conradrw/anaconda3/lib/python3.7/site-packages/IPython/__init__.py", line 54, in <module>
    from .core.application import Application
  File "/Users/conradrw/anaconda3/lib/python3.7/site-packages/IPython/core/application.py", line 23, in <module>
    from traitlets.config.application import Application, catch_config_error
  File "/Users/conradrw/anaconda3/lib/python3.7/site-packages/traitlets/config/__init__.py", line 6, in <module>
    from .application import *
  File "/Users/conradrw/anaconda3/lib/python3.7/site-packages/traitlets/config/application.py", line 100, in <module>
    class LevelFormatter(logging.Formatter):
AttributeError: module 'logging' has no attribute 'Formatter'

[kevin-bates]

Sounds like an instance of this: #2306 (comment) (although I don't think the work around reference worked).

Sounds like it's generally a good idea to always prefix custom module names in order to prevent conflicts like this.

[sidingli]

have you solved this problem???

[kevin-bates]

The solution, in this instance, is to rename or move the local file: logging.py, although there's potential for this on any number of file names.