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GeezerVison is showing github.com — [3.15] gh-157159: improve the tabnanny usage message (GH-157160) (#15… · python/cpython@cf312cf

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Lib
- tabnanny.py
- test
  - test_tabnanny.py
Misc/NEWS.d/next/Library
- 2026-09-08-09-30-00.gh-issue-157159.tabNny.rst

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`‎Lib/tabnanny.py‎`

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+1-1Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -47,7 +47,7 @@ def main():`
`47`	`47`	`if o == '-v':`
`48`	`48`	`verbose = verbose + 1`
`49`	`49`	`if not args:`
`50`		`- errprint("Usage:", sys.argv[0], "[-v] file_or_directory ...")`
	`50`	`+ errprint(f"Usage: {sys.executable} -m tabnanny [-v] file_or_directory ...")`
`51`	`51`	`for arg in args:`
`52`	`52`	`check(arg)`
`53`	`53`

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`‎Lib/test/test_tabnanny.py‎`

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+3-4Lines changed: 3 additions & 4 deletions

Original file line number	Diff line number	Diff line change
`@@ -7,12 +7,12 @@`
`7`	`7`	`from unittest import TestCase, main, mock`
`8`	`8`	`import errno`
`9`	`9`	`import os`
	`10`	`+import sys`
`10`	`11`	`import tabnanny`
`11`	`12`	`import tokenize`
`12`	`13`	`import tempfile`
`13`	`14`	`import textwrap`
`14`		`-from test.support import (captured_stderr, captured_stdout, script_helper,`
`15`		`- findfile)`
	`15`	`+from test.support import captured_stderr, captured_stdout, script_helper`
`16`	`16`	`from test.support.os_helper import unlink`
`17`	`17`
`18`	`18`
`@@ -328,8 +328,7 @@ def test_with_error_free_file(self):`
`328`	`328`
`329`	`329`	`def test_command_usage(self):`
`330`	`330`	`"""Should display usage on no arguments."""`
`331`		`- path = findfile('tabnanny.py')`
`332`		`- stderr = f"Usage: {path} [-v] file_or_directory ..."`
	`331`	`+ stderr = f"Usage: {sys.executable} -m tabnanny [-v] file_or_directory ..."`
`333`	`332`	`self.validate_cmd(stderr=stderr, expect_failure=True)`
`334`	`333`
`335`	`334`	`def test_quiet_flag(self):`

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`‎Misc/NEWS.d/next/Library/2026-09-08-09-30-00.gh-issue-157159.tabNny.rst‎`

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+2Lines changed: 2 additions & 0 deletions

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Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	+The usage message printed by ``python -m tabnanny`` when no arguments are
	`2`	+given now suggests ``python -m`` instead of the source file.

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