[bug] isort thinks `config` is a part of stdlib?

[wisechengyi]

Dummy.py

$ cat dummy.py 
import csv

from contextlib import contextmanager

import vertica_python
import yaml

import config
from db_config import DbConfig
import sql_generator as sql_gen
import util

Repro

$ isort --diff dummy.py 
--- /Users/me/workspace/source/dummy.py:before	2019-03-22 10:57:38.886071
+++ /Users/me/workspace/source/dummy.py:after	2019-03-22 11:01:22.796368
@@ -1,12 +1,9 @@
+import config
+from contextlib import contextmanager
 import csv
 
-from contextlib import contextmanager
-
-import vertica_python
-import yaml
-
-import config
 from db_config import DbConfig
 import sql_generator as sql_gen
 import util
-
+import vertica_python
+import yaml

.isort.cfg

$ cat .isort.cfg 
[settings]
line_length=100
indent=2
# 1/Vertical
multi_line_output=3
lines_after_imports=2
known_gen=gen
default_section=THIRDPARTY
sections=FUTURE,STDLIB,GEN,LOCALFOLDER,THIRDPARTY
force_sort_within_sections=1
force_alphabetical_sort_within_sections=1
# https://github.com/timothycrosley/isort/issues/723#issuecomment-425400842
combine_as_imports=1

contextlib and csv are correct, but config is not part of the stdlib:

$ python3 -c 'import config'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: No module named 'config'
$ python2 -c 'import config'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: No module named config

[timothycrosley]

Hi @wisechengyi,

You are correct that config should not be identified as a standard lib import! I haven't been able to reproduce this issue on my testing machines using the exact config, and file given - is there any chance you can provide some additional information:

What version of isort is being used? isort -v
What Operating System is isort being used on?
What is the verbose output given? isort --check-only dummy.py --verbose

Thanks!

~Timothy

[wisechengyi]

I can actually repro this without any additional config:
OS: osx 10.14.3

$ isort --check-only dummy.py --verbose

/#######################################################################\

     `sMMy`
     .yyyy-                                                      `
    ##soos##                                                    ./o.
          `     ``..-..`         ``...`.``         `   ```` ``-ssso```
     .s:-y-   .+osssssso/.     ./ossss+:so+:`    :+o-`/osso:+sssssssso/
     .s::y-   osss+.``.``     -ssss+-.`-ossso`   ssssso/::..::+ssss:::.
     .s::y-   /ssss+//:-.`   `ssss+     `ssss+   sssso`       :ssss`
     .s::y-   `-/+oossssso/  `ssss/      sssso   ssss/        :ssss`
     .y-/y-       ````:ssss`  ossso.    :ssss:   ssss/        :ssss.
     `/so:`    `-//::/osss+   `+ssss+-/ossso:    /sso-        `osssso/.
       \/      `-/oooo++/-      .:/++:/++/-`      ..           `://++/.


         isort your Python imports for you so you don't have to

                            VERSION 4.3.15

\########################################################################/

else-type place_module for csv returned STDLIB
from-type place_module for contextlib returned STDLIB
else-type place_module for vertica_python returned FIRSTPARTY
else-type place_module for yaml returned FIRSTPARTY
else-type place_module for config returned STDLIB
from-type place_module for db_config returned FIRSTPARTY
else-type place_module for sql_generator returned FIRSTPARTY
else-type place_module for util returned FIRSTPARTY
ERROR: /Users/yic/workspace/fiddle/isort-910/dummy.py Imports are incorrectly sorted.

isort is using this python2 at /usr/local/opt/python@2/bin/python2.7

$ which isort
/usr/local/bin/isort
$ cat /usr/local/bin/isort
#!/usr/local/opt/python@2/bin/python2.7
# -*- coding: utf-8 -*-
import re
import sys

from isort.main import main

if __name__ == '__main__':
    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
    sys.exit(main())

Sanity check on the interpreter:

$ /usr/local/opt/python@2/bin/python2.7 -c 'import config'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: No module named config

[timothycrosley]

This should be fixed for the 5.0.0 release in spirit via this ticket: #1147