def __init__(self, method):
<EOL>self.method = method<EOL>self.ext_cls = None<EOL>debug = os.environ.get('<STR_LIT>')<EOL>if debug is None:<EOL><INDENT>self._debug = <NUM_LIT:0><EOL><DEDENT>else:<EOL><INDENT>try:<EOL><INDENT>self._debug = max(<NUM_LIT:0>, int(debug))<EOL><DEDENT>except ValueError:<EOL><INDENT>self._debug = <NUM_LIT:1><EOL><DEDENT><DEDENT>self.debug(<NUM_LIT:2>, '<STR_LIT>' % self.method)<EOL>
Initialize an ``ExtensionDebugger`` instance.

:param where: A string indicating the name of the extension
              method that will be called.