[Bug 2081952] [NEW] under python3.12 antislash in strings prints a warning about invalid escape sequence

[Guillaume Boutry]

Public bug reported:

When installing Pecan with a python3.12 base, it will emits warnings
about invalid escape sequence:


Setting up python3-pecan (1.5.1-0ubuntu1) ...
/usr/lib/python3/dist-packages/pecan/core.py:320: SyntaxWarning: invalid escape sequence '\*'
  '''
/usr/lib/python3/dist-packages/pecan/routing.py:48: SyntaxWarning: invalid escape sequence '\('
  '^[0-9a-zA-Z-_$\(\)\.~!,;:*+@=]+$', route

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: python3-pecan 1.5.1-0ubuntu1 [modified: usr/lib/python3/dist-packages/pecan/routing.py]
ProcVersionSignature: Ubuntu 6.8.0-41.41-generic 6.8.12
Uname: Linux 6.8.0-41-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.1
Architecture: amd64
CasperMD5CheckResult: unknown
CloudArchitecture: x86_64
CloudBuildName: server
CloudID: lxd
CloudName: lxd
CloudPlatform: lxd
CloudSerial: 20240911
CloudSubPlatform: LXD socket API v. 1.0 (/dev/lxd/sock)
Date: Wed Sep 25 07:43:04 2024
PackageArchitecture: all
ProcEnviron:
 LANG=C.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
SourcePackage: python-pecan
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: python-pecan (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug cloud-image noble

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https://bugs.launchpad.net/bugs/2081952

Title:
  under python3.12 antislash in strings prints a warning about invalid
  escape sequence

Status in python-pecan package in Ubuntu:
  New

Bug description:
  When installing Pecan with a python3.12 base, it will emits warnings
  about invalid escape sequence:

  
  Setting up python3-pecan (1.5.1-0ubuntu1) ...
  /usr/lib/python3/dist-packages/pecan/core.py:320: SyntaxWarning: invalid escape sequence '\*'
    '''
  /usr/lib/python3/dist-packages/pecan/routing.py:48: SyntaxWarning: invalid escape sequence '\('
    '^[0-9a-zA-Z-_$\(\)\.~!,;:*+@=]+$', route

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: python3-pecan 1.5.1-0ubuntu1 [modified: usr/lib/python3/dist-packages/pecan/routing.py]
  ProcVersionSignature: Ubuntu 6.8.0-41.41-generic 6.8.12
  Uname: Linux 6.8.0-41-generic x86_64
  ApportVersion: 2.28.1-0ubuntu3.1
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CloudArchitecture: x86_64
  CloudBuildName: server
  CloudID: lxd
  CloudName: lxd
  CloudPlatform: lxd
  CloudSerial: 20240911
  CloudSubPlatform: LXD socket API v. 1.0 (/dev/lxd/sock)
  Date: Wed Sep 25 07:43:04 2024
  PackageArchitecture: all
  ProcEnviron:
   LANG=C.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   TERM=xterm-256color
   XDG_RUNTIME_DIR=<set>
  SourcePackage: python-pecan
  UpgradeStatus: No upgrade log present (probably fresh install)

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