Steps to reproduce:

1. mkdir new_directory
2. cd new_directory
3. ln -s not_exist bad_link.py
4. isort-identify-imports .

isort-identify-imports fails with FileNotFoundError. The same problem occurs when the files is unreadable due to permission issues.

In the case of isort, it is not an error but UserWarning. So I believe isort-identify-imports should do the same.

Emacs creates a lock file with a name like .#some_file.py as a symbolic link to a nonexistent target when there are unsaved changes in the buffer. As a result, running isort-identify-imports with an unsaved buffer in Emacs will result in an error.