AttributeError: type object 'File' has no attribute 'read'

[wmowen]

Traceback (most recent call last):
File "/Users/momo/.pyenv/versions/3.6.0/envs/mbtpy/bin/isort", line 11, in
sys.exit(main())
File "/Users/momo/.pyenv/versions/3.6.0/envs/mbtpy/lib/python3.6/site-packages/isort/main.py", line 953, in main
for sort_attempt in attempt_iterator:
File "/Users/momo/.pyenv/versions/3.6.0/envs/mbtpy/lib/python3.6/site-packages/isort/main.py", line 947, in
for file_name in file_names
File "/Users/momo/.pyenv/versions/3.6.0/envs/mbtpy/lib/python3.6/site-packages/isort/main.py", line 100, in sort_imports
**kwargs,
File "/Users/momo/.pyenv/versions/3.6.0/envs/mbtpy/lib/python3.6/site-packages/isort/api.py", line 303, in sort_file
with io.File.read(filename) as source_file:
AttributeError: type object 'File' has no attribute 'read'

[anirudnits]

@wmowen can you provide any other details on this issue? like the how you executed isort, config file etc.

[timothycrosley]

This is a duplicate of: #1593 which is fixed in isort development branch and awaiting release by end of month. More details are on the linked ticket, but the TLDR is that it's caused by a bug in Python 3.6.0 - which has been fixed in Python itself within the 3.6 series so isn't caught by isort's CI/CD which can't reasonably test against all minor releases of Python