CLI --flom-first flag require an argument

[amano-takahisa]

If I run

isort my_script.py --from-first

raise error like

usage: isort [-h] [-V] [--vn] [-v] [--only-modified] [--dedup-headings] [-q] [-d] [--overwrite-in-place] [--show-config]
             [--show-files] [--df] [-c] [--ws] [--sp SETTINGS_PATH] [--profile PROFILE] [--old-finders] [-j [JOBS]] [--ac]
             [--interactive] [--format-error FORMAT_ERROR] [--format-success FORMAT_SUCCESS] [--filter-files] [-s SKIP]
             [--extend-skip EXTEND_SKIP] [--sg SKIP_GLOB] [--extend-skip-glob SKIP_GLOB] [--gitignore] [--ext SUPPORTED_EXTENSIONS]
             [--blocked-extension BLOCKED_EXTENSIONS] [--dont-follow-links] [--filename FILENAME] [--allow-root] [-a ADD_IMPORTS]
             [--append] [--af] [--rm REMOVE_IMPORTS] [--float-to-top] [--dont-float-to-top] [--ca] [--cs] [-e] [--ff FROM_FIRST]
             [--fgw [FORCE_GRID_WRAP]] [-i INDENT] [--lai LINES_AFTER_IMPORTS] [--lbt LINES_BETWEEN_TYPES] [--le LINE_ENDING] [--ls]
             [--lss]
             [-m {GRID,VERTICAL,HANGING_INDENT,VERTICAL_HANGING_INDENT,VERTICAL_GRID,VERTICAL_GRID_GROUPED,VERTICAL_GRID_GROUPED_NO_COMMA,NOQA,VERTICAL_HANGING_INDENT_BRACKET,VERTICAL_PREFIX_FROM_MODULE_IMPORT,HANGING_INDENT_WITH_PARENTHESES,BACKSLASH_GRID,0,1,2,3,4,5,6,7,8,9,10,11}]
             [-n] [--nis] [--ot] [--dt] [--rr] [--reverse-sort] [--sort-order SORT_ORDER] [--sl] [--nsl SINGLE_LINE_EXCLUSIONS]
             [--tc] [--up] [-l LINE_LENGTH] [--wl WRAP_LENGTH] [--case-sensitive] [--remove-redundant-aliases] [--honor-noqa]
             [--treat-comment-as-code TREAT_COMMENTS_AS_CODE] [--treat-all-comment-as-code] [--formatter FORMATTER] [--color]
             [--ext-format EXT_FORMAT] [--star-first] [--sd DEFAULT_SECTION] [--only-sections] [--ds] [--fas] [--fss] [--hcss]
             [--srss] [--fass] [-t FORCE_TO_TOP] [--combine-straight-imports] [--nlb NO_LINES_BEFORE] [--src SRC_PATHS]
             [-b KNOWN_STANDARD_LIBRARY] [--extra-builtin EXTRA_STANDARD_LIBRARY] [-f KNOWN_FUTURE_LIBRARY] [-o KNOWN_THIRD_PARTY]
             [-p KNOWN_FIRST_PARTY] [--known-local-folder KNOWN_LOCAL_FOLDER] [--virtual-env VIRTUAL_ENV] [--conda-env CONDA_ENV]
             [--py {all,2,27,3,35,36,37,38,39,auto}]
             [files [files ...]]
isort: error: argument --ff/--from-first: expected one argument

Is this expected behavior? Otherwise, I thought

action="store_true",

is missing in this section.

isort/isort/main.py

Lines 461 to 467 in 2776034

	output_group.add_argument(
	"--ff",
	"--from-first",
	dest="from_first",
	help="Switches the typical ordering preference, "
	"showing from imports first then straight ones.",
	)

My isort version is 5.9.2