-l, --line-length INTEGER       How many characters per line to allow.


                                [default: 88]
--py36                          Allow using Python 3.6-only syntax on all


                                input files.  This will put trailing commas


                                in function signatures and calls also after


                                *args and **kwargs.  [default: per-file


                                auto-detection]
--pyi                           Format all input files like typing stubs


                                regardless of file extension (useful when


                                piping source on standard input).
-S, --skip-string-normalization


                                Don't normalize string quotes or prefixes.
--check                         Don't write the files back, just return the


                                status.  Return code 0 means nothing would


                                change.  Return code 1 means some files


                                would be reformatted.  Return code 123 means


                                there was an internal error.
--diff                          Don't write the files back, just output a


                                diff for each file on stdout.
--fast / --safe                 If --fast given, skip temporary sanity


                                checks. [default: --safe]
--include TEXT                  A regular expression that matches files and


                                directories that should be included on


                                recursive searches.  An empty value means


                                all files are included regardless of the


                                name.  Use forward slashes for directories


                                on all platforms (Windows, too).  Exclusions


                                are calculated first, inclusions later.


                                [default: \.pyi?$]
--exclude TEXT                  A regular expression that matches files and


                                directories that should be excluded on


                                recursive searches.  An empty value means no


                                paths are excluded. Use forward slashes for


                                directories on all platforms (Windows, too).


                                Exclusions are calculated first, inclusions


                                later.  [default: /(\.git|\.hg|\.mypy_cache|


                                \.tox|\.venv|_build|buck-out|build|dist)/]
-q, --quiet                     Don't emit non-error messages to stderr.


                                Errors are still emitted, silence those with


                                2>/dev/null.
-v, --verbose                   Also emit messages to stderr about files


                                that were not changed or were ignored due to


                                --exclude=.
--version                       Show the version and exit.
--config FILE                   Read configuration from PATH.
-h, --help                      Show this message and exit.