Check when extra in log override default fields

[orsinium]

When passed to logger extra parameters overwrite default logging fields like name, lineno or message, logging raises KeyError exception at runtime. It will be very useful to find out this at static checks stage.

Example:

import logging
logging.warning('msg', extra=dict(name='test'))

This raises next exception:

KeyError: "Attempt to overwrite 'name' in LogRecord"

[orsinium]

From python-json-logger:

RESERVED_ATTRS = (
    'args', 'asctime', 'created', 'exc_info', 'exc_text', 'filename',
    'funcName', 'levelname', 'levelno', 'lineno', 'module',
    'msecs', 'message', 'msg', 'name', 'pathname', 'process',
    'processName', 'relativeCreated', 'stack_info', 'thread', 'threadName')