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IDLE -s and (-, -c command, or -r file) produces error message #68453

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IDLE -s and (-, -c command, or -r file) produces error message#68453
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terryjreedy
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topic-IDLEtype-bugAn unexpected behavior, bug, or error

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@pppery
pppery
mannequin
opened on May 22, 2015
BPO 24265
Nosy @terryjreedy, @kbkaiser, @serwy, @pppery

Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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GitHub fields:

assignee = 'https://github.com/terryjreedy'
closed_at = None
created_at = <Date 2015-05-22.13:16:16.379>
labels = ['expert-IDLE', 'type-bug', '3.10']
title = 'IDLE -s and (-, -c command, or -r file) produces error message'
updated_at = <Date 2020-06-07.23:28:23.292>
user = 'https://github.com/pppery'

bugs.python.org fields:

activity = <Date 2020-06-07.23:28:23.292>
actor = 'terry.reedy'
assignee = 'terry.reedy'
closed = False
closed_date = None
closer = None
components = ['IDLE']
creation = <Date 2015-05-22.13:16:16.379>
creator = 'ppperry'
dependencies = []
files = []
hgrepos = []
issue_num = 24265
keywords = []
message_count = 2.0
messages = ['243824', '273523']
nosy_count = 4.0
nosy_names = ['terry.reedy', 'kbk', 'roger.serwy', 'ppperry']
pr_nums = []
priority = 'normal'
resolution = None
stage = 'test needed'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue24265'
versions = ['Python 3.10']

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Activity

  1. pppery commented on May 22, 2015

    @pppery
    ppperymannequin
    on May 22, 2015
    MannequinAuthor

    When I run "python -m idlelib.idle -sc [command] from the command line, IDLE runs the startup file, but then pops up an error message saying "the Python Shell window is already executing a command;please wait until it is finished." When the error window is closed, the command executes, unless the main Python Shell has already been closed, in which case a traceback occurs:

    Traceback (most recent call last):
  File "C:\Python27\lib\runpy.py", line 162, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "C:\Python27\lib\runpy.py", line 72, in _run_code
    exec code in run_globals
  File "C:\Python27\lib\idlelib\idle.py", line 11, in <module>
    idlelib.PyShell.main()
  File "C:\Python27\lib\idlelib\PyShell.py", line 1602, in main
    shell.interp.execsource(cmd)
AttributeError: 'NoneType' object has no attribute 'execsource'
  2. pppery
    added
    topic-IDLE
    type-bugAn unexpected behavior, bug, or error
    on May 22, 2015

  3. terryjreedy commented on Aug 24, 2016

    @terryjreedy
    terryjreedy
    on Aug 24, 2016
    Member

    I confirmed the bug on Win10 with 3.5 and 3.6. "python -m idlelib -s" prints a prompt*, runs the file and prints any output, and prints a prompt. It then accepts user input. When "-c command" is added, it should accept that as user input (and perhaps display it on the input line). But I get the same error box. When clicked away, 'command' executes and a third prompt is displayed.

    *Another bug. The startup file should run first, before a prompt, just as it does in python, and just as with files run with F5. It would not hurt if [Running <path>] were printed, but not a prompt. Prompts should mean 'ready to accept input'. Ditto for -c command, unless IDLE is changed to display the command after the prompt as if typed in.

    Warning comes from ModifiedInterpreter (MI).dispaly_executing_dialog, which is called in MI.runcommand if 'self.tkconsole.executing'.  MI.runcommand is used for internal startup code and for '-', '-c', and '-r' on the command line, but not for user '>>> ' and editor code.

    I confirmed that '-s' + '-' or '-r' give the same warning. Hence the title change.

    MI.tkconsole is the PyShell (PS) window instance. PS.executing is set/reset in PS.beginexecuting, PS.endexecuting. The latter should apparently be called someplace it is not now.

  4. terryjreedy
    changed the title [-]IDLE produces error message when run with both -s and -c.[/-] [+]IDLE -s and (-, -c command, or -r file) produces error message[/+] on Aug 24, 2016
  5. terryjreedy
    added
    3.7 (EOL)end of life
    on Jun 30, 2017
  6. terryjreedy
    self-assigned this
    on Jun 30, 2017
  7. terryjreedy
    added
    3.10 (EOL)end of life
    and removed
    3.7 (EOL)end of life
    on Jun 7, 2020
  8. ezio-melotti
    transferred this issue fromon Apr 10, 2022
  9. terryjreedy
    added this to IDLE Issueson Jul 23, 2022
  10. terryjreedy
    removed
    3.10 (EOL)end of life
    on Jan 15, 2026
  11. terryjreedy
    added 3 commits that reference this issue on Sep 16, 2026

    gh-68453: Fix IDLE -s together with -c, -r or - (#157592)

    9cc3547

    [3.14] gh-68453: Fix IDLE -s together with -c, -r or - (GH-157592) (#…

    9e76aa3

    [3.13] gh-68453: Fix IDLE -s together with -c, -r or - (GH-157592) (#…

    488643c
  12. terryjreedy
    closed this as completedon Sep 16, 2026
  13. github-project-automation
    moved this to Done in IDLE Issueson Sep 16, 2026
  14. terryjreedy
    added a commit that references this issue on Oct 9, 2026

    [3.15] gh-68453: Fix IDLE -s together with -c, -r or - (GH-157592) (#…

    6828ce0
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