defusedxml does not work with rich library to print exceptions

[yauhen-sobaleu]

Hello!

When using defused xml with rich traceback formatter the library always throws a weird error complaining about the type of exception. Everything is ok when using import xml.etree.cElementTree as xmlctree.

import io

import defusedxml.ElementTree as xmlctree
import structlog

rich_tracebacks_fmt = structlog.dev.RichTracebackFormatter()

structlog.configure(
    cache_logger_on_first_use=True,
    processors=[
        # show log level
        structlog.stdlib.add_log_level,
        # add time to every log entry
        structlog.processors.TimeStamper(fmt="%Y-%m-%d %H:%M.%S"),
        # render logs in pretty format (unstructured) + beautiful tracebacks
        structlog.dev.ConsoleRenderer(exception_formatter=rich_tracebacks_fmt),
    ],
)


logger = structlog.get_logger()

try:
    for _, elem in xmlctree.iterparse(io.BytesIO(b"sdsds")):
        print(elem)
except Exception as e:
    logger.exception(str(e))

traceback

> python feed_loader/test.py
Traceback (most recent call last):
  File "project/.venv/lib/python3.11/xml/etree/ElementTree.py", line 1716, in close
    self.parser.Parse(b"", True) # end of data
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
xml.parsers.expat.ExpatError: syntax error: line 1, column 0

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "project/feed_loader/test.py", line 24, in <module>
    for _, elem in xmlctree.iterparse(io.BytesIO(b"sdsds")):
  File "project/.venv/lib/python3.11/xml/etree/ElementTree.py", line 1255, in iterator
    root = pullparser._close_and_return_root()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "project/.venv/lib/python3.11/xml/etree/ElementTree.py", line 1298, in _close_and_return_root
    root = self._parser.close()
           ^^^^^^^^^^^^^^^^^^^^
  File "project/.venv/lib/python3.11/xml/etree/ElementTree.py", line 1718, in close
    self._raiseerror(v)
  File "project/.venv/lib/python3.11/xml/etree/ElementTree.py", line 1618, in _raiseerror
    raise err
xml.etree.ElementTree.ParseError: syntax error: line 1, column 0

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "project/feed_loader/test.py", line 27, in <module>
    logger.exception(str(e))
  File "project/.venv/lib/python3.11/site-packages/structlog/_log_levels.py", line 88, in exception
    return self.error(event, *args, **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "project/.venv/lib/python3.11/site-packages/structlog/_log_levels.py", line 168, in meth
    return self._proxy_to_logger(name, event, **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "project/.venv/lib/python3.11/site-packages/structlog/_base.py", line 222, in _proxy_to_logger
    args, kw = self._process_event(method_name, event, event_kw)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "project/.venv/lib/python3.11/site-packages/structlog/_base.py", line 171, in _process_event
    event_dict = proc(self._logger, method_name, event_dict)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "project/.venv/lib/python3.11/site-packages/structlog/dev.py", line 505, in __call__
    self._exception_formatter(sio, exc_info)
  File "project/.venv/lib/python3.11/site-packages/structlog/dev.py", line 217, in __call__
    Console(file=sio, color_system=self.color_system).print(
  File "project/.venv/lib/python3.11/site-packages/rich/console.py", line 1700, in print
    extend(render(renderable, render_options))
  File "project/.venv/lib/python3.11/site-packages/rich/console.py", line 1332, in render
    for render_output in iter_render:
  File "project/.venv/lib/python3.11/site-packages/rich/traceback.py", line 545, in __rich_console__
    highlighter(stack.syntax_error.msg),
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "project/.venv/lib/python3.11/site-packages/rich/highlighter.py", line 37, in __call__
    raise TypeError(f"str or Text instance required, not {text!r}")