Change "opt()" to not preserve attributes

loguru/__init__.py

@@ -6,7 +6,7 @@
 
 __version__ = "0.0.1"
 
-logger = _Logger()
+logger = _Logger({}, False, False, False)
 
 if _constants.LOGURU_AUTOINIT and _sys.stderr:
     logger.start(_sys.stderr)

loguru/_logger.py

@@ -73,20 +73,15 @@ class Logger:
 
     _lock = threading.Lock()
 
-    def __init__(self, *, extra={}, record=False, exception=None, lazy=False):
+    def __init__(self, extra, exception, record, lazy):
         self.catch = Catcher(self)
         self.extra = extra
         self._record = record
         self._exception = exception
         self._lazy = lazy
 
-    def opt(self, exception=None, record=None, lazy=None):
-        extra = self.extra.copy()
-        exception = self._exception if exception is None else exception
-        record = self._record if record is None else record
-        lazy = self._lazy if lazy is None else lazy
-        logger = Logger(extra=extra, exception=exception, record=record, lazy=lazy)
-        return logger
+    def opt(self, *, exception=False, record=False, lazy=False):
+        return Logger(self.extra, exception, record, lazy)
 
     def bind(self, **kwargs):
         extra = {**self.extra, **kwargs}

tests/test_opt.py

@@ -93,19 +93,6 @@ def test_keep_extra(writer):
 
     assert writer.read() == "123\n"
 
-def test_keep_others(writer):
-    logger.start(writer, format='{message}')
-    logger.opt(record=True).opt().debug("{record[level].name}")
-    logger.debug("{record}", record=123)
-    try:
-        1 / 0
-    except:
-        logger.opt(record=True).opt(exception=True).debug("{record[level].no}")
-
-    result = writer.read().strip()
-    assert result.startswith("DEBUG\n123\n10\n")
-    assert result.endswith("ZeroDivisionError: division by zero")
-
 def test_before_bind(writer):
     logger.start(writer, format='{message}')
     logger.opt(record=True).bind(key="value").info("{record[level]}")