Bug report
Bug description:
Prior to Python 3.13, long usage text of arguments in mutually exclusive groups would wrap to multiple lines. This is no longer the case in Python 3.13:
import argparse
parser = argparse.ArgumentParser(
prog="PROG", formatter_class=lambda prog: argparse.HelpFormatter(prog, width=80)
)
meg = parser.add_mutually_exclusive_group()
meg.add_argument("--op1", metavar="MET", nargs="?")
meg.add_argument("--op2", metavar=("MET1", "MET2"), nargs="*")
meg.add_argument("--op3", nargs="*")
meg.add_argument("--op4", metavar=("MET1", "MET2"), nargs="+")
meg.add_argument("--op5", nargs="+")
meg.add_argument("--op6", nargs=3)
meg.add_argument("--op7", metavar=("MET1", "MET2", "MET3"), nargs=3)
parser.print_help()Python 3.12 output:
usage: PROG [-h] [--op1 [MET] | --op2 [MET1 [MET2 ...]] | --op3 [OP3 ...] |
--op4 MET1 [MET2 ...] | --op5 OP5 [OP5 ...] | --op6 OP6 OP6 OP6 |
--op7 MET1 MET2 MET3]
Python 3.13 output:
usage: PROG [-h]
[--op1 [MET] | --op2 [MET1 [MET2 ...]] | --op3 [OP3 ...] | --op4 MET1 [MET2 ...] | --op5 OP5 [OP5 ...] | --op6 OP6 OP6 OP6 | --op7 MET1 MET2 MET3]
This is a regression I introduced in #105039. I am working on a fix for this.
/cc @encukou (sorry for the regression!)
CPython versions tested on:
3.12, 3.13
Operating systems tested on:
Linux
Linked PRs
Bug report
Bug description:
Prior to Python 3.13, long usage text of arguments in mutually exclusive groups would wrap to multiple lines. This is no longer the case in Python 3.13:
Python 3.12 output:
Python 3.13 output:
This is a regression I introduced in #105039. I am working on a fix for this.
/cc @encukou (sorry for the regression!)
CPython versions tested on:
3.12, 3.13
Operating systems tested on:
Linux
Linked PRs