Ubuntu系统更新后第三方Python文件触发UnicodeDecodeError求助

Ubuntu机器完成最近一次系统更新后，大量第三方Python文件突然抛出UnicodeDecodeError错误，涉及Gaffer和Arnold渲染器，更新前运行正常，修改源码并非可行方案。报错信息如下：

ERROR : startup/gui/menus.py : Error loading Arnold module - "'utf-8' codec can't decode byte 0xa0 in position 0: invalid start byte".
 Traceback (most recent call last):
  File "/home/julius/bin/gaffer-1.3.2.0-linux/startup/gui/menus.py", line 123, in <module>
    import GafferArnoldUI
  File "/home/julius/bin/gaffer-1.3.2.0-linux/lib/python3.7/site-packages/shiboken2/files.dir/shibokensupport/feature.py", line 139, in _import
    return original_import(name, *args, **kwargs)
  File "/home/julius/bin/gaffer-1.3.2.0-linux/arnold/7.2/python/GafferArnoldUI/__init__.py", line 41, in <module>
    from . import ArnoldShaderUI
  File "/home/julius/bin/gaffer-1.3.2.0-linux/lib/python3.7/site-packages/shiboken2/files.dir/shibokensupport/feature.py", line 139, in _import
    return original_import(name, *args, **kwargs)
  File "/home/julius/bin/gaffer-1.3.2.0-linux/arnold/7.2/python/GafferArnoldUI/ArnoldShaderUI.py", line 400, in <module>
    __translateNodeMetadata( arnold.AiNodeEntryIteratorGetNext( nodeIt ) )
  File "/home/julius/bin/gaffer-1.3.2.0-linux/arnold/7.2/python/GafferArnoldUI/ArnoldShaderUI.py", line 255, in __translateNodeMetadata
    presetValues = __enumPresetValues( param )
  File "/home/julius/bin/gaffer-1.3.2.0-linux/arnold/7.2/python/GafferArnoldUI/ArnoldShaderUI.py", line 132, in __enumPresetValues
    preset = arnold.AiEnumGetString( enum, len( presets ) )
  File "/opt/Autodesk/arnold/7.2.3.2/python/arnold/ai_enum.py", line 22, in AiEnumGetString
    return AtPythonStringToStr(_AiEnumGetString(enum_type, index))
  File "/opt/Autodesk/arnold/7.2.3.2/python/arnold/ai_types.py", line 36, in AtPythonStringToStr
    return str(astring)
  File "/opt/Autodesk/arnold/7.2.3.2/python/arnold/ai_types.py", line 28, in __str__
    return self.decode()
  File "/opt/Autodesk/arnold/7.2.3.2/python/arnold/ai_types.py", line 33, in decode
    return self.value.decode('utf-8')
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xa0 in position 0: invalid start byte

已尝试的排查操作 #

• 怀疑系统locale配置异常，重置为默认值并重启，问题依旧。当前locale输出：

> locale
LANG=en_US.UTF-8
LANGUAGE=en_US.UTF-8
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=

• 确认系统Python版本指向：

> ll $(which python)
lrwxrwxrwx 1 root root 24 Sep  9 15:23 /usr/bin/python -> /etc/alternatives/python

> ll /etc/alternatives/python
lrwxrwxrwx 1 root root 19 Sep  9 15:23 /etc/alternatives/python -> /usr/bin/python3.10

目前无法确定后续排查方向，恳请提供解决思路。

内容的提问来源于stack exchange，提问作者julsVFX