avoid explicit type != type comparison: flake8

qiita_client/qiita_client.py

@@ -57,7 +57,7 @@ def __init__(self, output_name, artifact_type, files, archive=None):
 
     def __eq__(self, other):
         logger.debug('Entered ArtifactInfo.__eq__()')
-        if type(self) != type(other):
+        if not isinstance(other, ArtifactInfo):
             return False
         if self.output_name != other.output_name or \
                 self.artifact_type != other.artifact_type or \