Why is my Python CLI input mangled?

[rokejulianlockhart (Mr Beedell, Roke Julian Lockhart)]

When I invoke /usr/bin/python3 (from python3-3.14.7-1.fc44), whether in konsole-26.08.0-1.fc44 or warp-terminal-preview-v0.2026.09.02.08.27.preview_01-1 (irrespective of whether first invoked in another shell, like powershell-7.6.3-1.fc44, or bash-5.3.9-3.fc44), if the terminal emulator’s window is short, the first few lines, of code that I paste into it, are redacted from the pasted output:

Python 3.14.7 (main, Aug 10 2026, 00:00:00) [GCC 16.1.1 20260515 (Red Hat 16.1.1-2)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> 
























... properties = {}
... for name in tags:
...     value = header[
...             getattr(
...                     rpm,
...                     f"RPMTAG_{name}"
...             )
...     ]
...     if name in (
...             "INSTALLTIME",
...             "BUILDTIME"
...     ):
...             value = (
...                     datetime.fromtimestamp(
...                             value,
...                             timezone.utc
...                     )
...                     .isoformat(timespec="seconds")
...                     .replace(
...                             "+00:00",
...                             "Z"
...                     )
...             )
...     properties[name] = value
... print(
...     yaml.safe_dump(
...             properties,
...             sort_keys=False,
...             default_flow_style=False,
...     )
... )
... 
NAME: signal-desktop
VERSION: 8.26.0
RELEASE: 1.fc44
ARCH: x86_64
INSTALLTIME: '2026-09-03T23:39:58Z'
SIZE: 430169042
SIGPGP: !!binary |
  wqsEABYIAF0FgmqZ3YsJEADNq0PeIm1vNRQAAAAAABwAEHNhbHRAbm90YXRpb25zLm9wZW5wZ3Bq
  cy5vcmepfwkn0zWmu3r3TN1XpYFiFiEErgkVek3oi0l+odXTAM2rQ94ibW8AAO9jAP9ku8M7/ktQ
  hCoEgSNyC9jp8nXYlboW1tSQuMAdQ35zhwD8DeKbCnQpvy8qyke21uVWhHhta0ibbIJ20oyYd7Kq
  Tgc=
SOURCERPM: signal-desktop-8.26.0-1.fc44.src.rpm
BUILDTIME: '2026-09-03T20:44:19Z'
BUILDHOST: 262b08a52583
PACKAGER: junefish <june@fyralabs.com>
VENDOR: Terra

>>>

Otherwise, the indentation is corrupted:

Python 3.14.7 (main, Aug 10 2026, 00:00:00) [GCC 16.1.1 20260515 (Red Hat 16.1.1-2)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> #!/usr/bin/env python3
... import rpm, yaml
... from datetime import datetime, timezone
... from shutil import which
... package = which("signal-desktop")
... header = next(
...     rpm.TransactionSet().dbMatch(
   ...          "basenames",
          ...           package
                  ...   )
                   ... )
                   ... tags = (
                   ...  "NAME",
                   ...  "VERSION",
                   ...  "RELEASE",
                   ...  "ARCH",
                   ...  "INSTALLTIME",
                   ...  "SIZE",
                   ...  "SIGPGP",
                   ...  "SOURCERPM",
                   ...  "BUILDTIME",
                   ...  "BUILDHOST",
                   ...  "PACKAGER",
                   ...  "VENDOR",
                   ... )
                   ... properties = {}
                   ... for name in tags:
                   ...  value = header[
                   ...          getattr(
                          ...                   rpm,
                                         ...                    f"RPMTAG_{name}"
                                                         ...            )
                                                                  ...   ]
                                                                   ...  if name in (
                                                                   ...          "INSTALLTIME",
                                                                          ...           "BUILDTIME"
                                                                                  ...   ):
                                                                                   ...          value = (
                                                                                          ...                   datetime.fromtimestamp(
                                                                                                         ...                            value,
                                                                                                                                ...                             timezone.utc
                                                                                                                                                        ...                     )
                                                                                                                                                                         ...                    .isoformat(timespec="seconds")
                                                                                                                                                                                         ...                    .replace(
                                                                                                                                                                                                         ...                            "+00:00",
                                                                                                                                                                                                                                ...                             "Z"
                                                                                                                                                                                                                                                        ...                     )
                                                                                                                                                                                                                                                                         ...            )
                                                                                                                                                                                                                                                                                  ...   properties[name] = value
                                                                                                                                                                                                                                                                                   ... print(
                                                                                                                                                                                                                                                                                   ...  yaml.safe_dump(
                                                                                                                                                                                                                                                                                   ...          properties,
                                                                                                                                                                                                                                                                                          ...           sort_keys=False,
                                                                                                                                                                                                                                                                                                  ...           default_flow_style=False,
...     )
   ... )
   ... 
NAME: signal-desktop
VERSION: 8.26.0
RELEASE: 1.fc44
ARCH: x86_64
INSTALLTIME: '2026-09-03T23:39:58Z'
SIZE: 430169042
SIGPGP: !!binary |
  wqsEABYIAF0FgmqZ3YsJEADNq0PeIm1vNRQAAAAAABwAEHNhbHRAbm90YXRpb25zLm9wZW5wZ3Bq
  cy5vcmepfwkn0zWmu3r3TN1XpYFiFiEErgkVek3oi0l+odXTAM2rQ94ibW8AAO9jAP9ku8M7/ktQ
  hCoEgSNyC9jp8nXYlboW1tSQuMAdQ35zhwD8DeKbCnQpvy8qyke21uVWhHhta0ibbIJ20oyYd7Kq
  Tgc=
SOURCERPM: signal-desktop-8.26.0-1.fc44.src.rpm
BUILDTIME: '2026-09-03T20:44:19Z'
BUILDHOST: 262b08a52583
PACKAGER: junefish <june@fyralabs.com>
VENDOR: Terra

>>>

Even worse, albeit potentially tangential, attempting to go back a command mangles the output further:

However, it executes correctly, regardless. The original code is:

#!/usr/bin/env python3
import rpm, yaml
from datetime import datetime, timezone
from shutil import which
package = which("signal-desktop")
header = next(
	rpm.TransactionSet().dbMatch(
		"basenames",
		package
	)
)
tags = (
	"NAME",
	"VERSION",
	"RELEASE",
	"ARCH",
	"INSTALLTIME",
	"SIZE",
	"SIGPGP",
	"SOURCERPM",
	"BUILDTIME",
	"BUILDHOST",
	"PACKAGER",
	"VENDOR",
)
properties = {}
for name in tags:
	value = header[
		getattr(
			rpm,
			f"RPMTAG_{name}"
		)
	]
	if name in (
		"INSTALLTIME",
		"BUILDTIME"
	):
		value = (
			datetime.fromtimestamp(
				value,
				timezone.utc
			)
			.isoformat(timespec="seconds")
			.replace(
				"+00:00",
				"Z"
			)
		)
	properties[name] = value
print(
	yaml.safe_dump(
		properties,
		sort_keys=False,
		default_flow_style=False,
	)
)

My Environment

NAME: python3 
VERSION: 3.14.7 
RELEASE: 1.fc44 
ARCH: x86_64 
INSTALLTIME: '2026-08-19T23:41:21Z' 
SIZE: 29390 
SIGPGP: null 
SOURCERPM: python3.14-3.14.7-1.fc44.src.rpm 
BUILDTIME: '2026-08-12T08:46:11Z' 
BUILDHOST: buildvm-x86-19.rdu3.fedoraproject.org 
PACKAGER: Fedora Project 
VENDOR: Fedora Project

[barry-scott]

I’d think this is not a python issue.
Do other commands also fail to wrap?

I notice you have a horizontal scroll bar, that is not the default.
I see the long lines wrapping.

My guess is that you may have changed a setting with stty or maybe terminal emulator settings?

What does your stty report? It should only list non-default options.

[rokejulianlockhart (Mr Beedell, Roke Julian Lockhart)]

@barry-scott

I notice you have a horizontal scroll bar, that is not the default.

@barry-scott, I do not. Konsole does not offer one:

Is is possible to enable horizontal scrolling in Konsole?

---

@barry-scott

Do other commands also fail to wrap?

Has anything failed to wrap? Even you state that you observe the lines wrap. The problem depicted is that the indentation is syntactically erroneous, and that lines outside of the immediately visible section of the viewport are redacted upon paste.

---

@barry-scott

What does your stty report?

Python 3.14.7 (main, Aug 10 2026, 00:00:00) [GCC 16.1.1 20260515 (Red Hat 16.1.1-2)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import builtins; import subprocess; builtins.print(subprocess.check_output("stty", text=True))
speed 38400 baud; line = 0;
-brkint -imaxbel iutf8

>>>

The output is identical in all aforementioned shells and terminal emulators.

[barry-scott]

@rokejulianlockhart

@barry-scott

I notice you have a horizontal scroll bar, that is not the default.

@barry-scott, I do not. Konsole does not offer one:

Oh its the web browser adding the scroll bar! Sorry.

[rokejulianlockhart (Mr Beedell, Roke Julian Lockhart)]

The solution is to utilise spaces, rather than tabulators:

The REPL corrupts and redacts pasted tab-indented code.