Improve `ast` CLI with new options: `--feature-version`, `--optimize`, and `--show-empty`

[sobolevn]

Feature or enhancement

Current options:

» ./python.exe -m ast --help
usage: python.exe -m ast [-h] [-m {exec,single,eval,func_type}] [--no-type-comments] [-a]
 [-i INDENT]
 [infile]

positional arguments:
 infile the file to parse; defaults to stdin

options:
 -h, --help show this help message and exit
 -m, --mode {exec,single,eval,func_type}
 specify what kind of code must be parsed
 --no-type-comments don't add information about type comments
 -a, --include-attributes
 include attributes such as line numbers and column offsets
 -i, --indent INDENT indentation of nodes (number of spaces)
 

Basically, our CLI is an interface to ast.dump + ast.parse, ast.parse.

But, ast.parse has several important options that are missing right now. I propose to add them:

• --feature-version
• and --optimize from parse
• --show-empty from dump

Docs:

• https://docs.python.org/3/library/ast.html#ast.parse
• https://docs.python.org/3/library/ast.html#ast.dump

cc @donbarbos, will you be interested in working on this issue?
If not, please, tell me about that - I want to have this in 3.14 and the feature freeze is in several days.

Linked PRs

• gh-133367: Add missing options to ast CLI #133369

[donbarbos]

sure, i would be glad to implement it

[sobolevn]

awesome, tag me on PR - I will review it as soon as possible.