package `imp' used in iostream.py is deprecated since Python 3.4 #560
Description
ipykernel/ipykernel/iostream.py
Line 9 in b7f14bf
Running with ``python -We'' (treat warnings as errors), this causes:
File "/home/travis/virtualenv/python3.8.0/lib/python3.8/site-packages/ipykernel/iostream.py", line 12, in <module>
from importlib import lock_held as import_lock_held
ImportError: cannot import name 'lock_held' from 'importlib' (/home/travis/virtualenv/python3.8.0/lib/python3.8/importlib/__init__.py)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/opt/python/3.8.0/lib/python3.8/runpy.py", line 192, in _run_module_as_main
return _run_code(code, main_globals, None,
File "/opt/python/3.8.0/lib/python3.8/runpy.py", line 85, in _run_code
exec(code, run_globals)
File "/home/travis/virtualenv/python3.8.0/lib/python3.8/site-packages/ipykernel/__main__.py", line 2, in <module>
from ipykernel import kernelapp as app
File "/home/travis/virtualenv/python3.8.0/lib/python3.8/site-packages/ipykernel/kernelapp.py", line 38, in <module>
from .iostream import IOPubThread
File "/home/travis/virtualenv/python3.8.0/lib/python3.8/site-packages/ipykernel/iostream.py", line 14, in <module>
from imp import lock_held as import_lock_held
File "/home/travis/virtualenv/python3.8.0/lib/python3.8/imp.py", line 31, in <module>
warnings.warn("the imp module is deprecated in favour of importlib; "
DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
The proposed alternative is importlib: https://docs.python.org/3/library/importlib.html#module-importlib