Add upload artifact supports pd.DataFrame

examples/artifacts_toy.py

@@ -12,7 +12,7 @@ df = pd.DataFrame({'num_legs': [2, 4, 8, 0],
                    'num_specimen_seen': [10, 2, 1, 8]},
                   index=['falcon', 'dog', 'spider', 'fish'])
 
-# register Pandas object as artifact to watch
+# Register Pandas object as artifact to watch
 # (it will be monitored in the background and automatically synced and uploaded)
 task.register_artifact('train', df, metadata={'counting': 'legs', 'max legs': 69})
 # change the artifact object
@@ -20,6 +20,8 @@ df.sample(frac=0.5, replace=True, random_state=1)
 # or access it from anywhere using the Task
 Task.current_task().artifacts['train'].sample(frac=0.5, replace=True, random_state=1)
 
+# add and upload pandas.DataFrame (onetime snapshot of the object)
+task.upload_artifact('Pandas', artifact_object=df)
 # add and upload local file artifact
 task.upload_artifact('local file', artifact_object='samples/dancing.jpg')
 # add and upload dictionary stored as JSON)

trains/backend_interface/task/task.py

@@ -243,7 +243,7 @@ class Task(IdObjectBase, AccessMixin, SetupUploadMixin):
         value = value.rstrip('/') if value else None
         self._storage_uri = StorageHelper.conform_url(value)
         self.data.output.destination = self._storage_uri
-        self._edit(output_dest=self._storage_uri or '')
+        self._edit(output_dest=self._storage_uri or ('' if Session.check_min_api_version('2.3') else None))
         if self._storage_uri or self._output_model:
             self.output_model.upload_storage_uri = self._storage_uri
 

trains/backend_interface/util.py

@@ -47,8 +47,9 @@ def get_single_result(entity, query, results, log=None, show_results=10, raise_o
                 results = sorted(results, key=lambda x: int(x.created.strftime('%s')
                                                             if x.created else 0), reverse=True)
 
-        for obj in (o if isinstance(o, dict) else o.to_dict() for o in results[:show_results]):
-            log.warn('Found {entity} `{obj[name]}` (id={obj[id]})'.format(**locals()))
+        for i, obj in enumerate(o if isinstance(o, dict) else o.to_dict() for o in results[:show_results]):
+            selected = 'Selected' if i == 0 else 'Additionally found'
+            log.warn('{selected} {entity} `{obj[name]}` (id={obj[id]})'.format(**locals()))
 
         if raise_on_error:
             raise ValueError('More than one {entity}s found when searching for ``{query}`'.format(**locals()))

trains/binding/artifacts.py

@@ -123,6 +123,15 @@ class Artifacts(object):
             np.savez_compressed(local_filename, **{name: artifact_object})
             delete_after_upload = True
             use_filename_in_uri = False
+        elif pd and isinstance(artifact_object, pd.DataFrame):
+            artifact_type = 'pandas'
+            artifact_type_data.content_type = 'text/csv'
+            artifact_type_data.preview = str(artifact_object.__repr__())
+            fd, local_filename = mkstemp(suffix=self._save_format)
+            os.close(fd)
+            artifact_object.to_csv(local_filename, compression=self._compression)
+            delete_after_upload = True
+            use_filename_in_uri = False
         elif isinstance(artifact_object, Image.Image):
             artifact_type = 'image'
             artifact_type_data.content_type = 'image/png'

trains/task.py

@@ -672,6 +672,7 @@ class Task(_Task):
         :param object artifact_object: Artifact object to upload. Currently supports:
             - string / pathlib2.Path are treated as path to artifact file to upload
             - dict will be stored as .json,
+            - pandas.DataFrame will be stored as .csv.gz (compressed CSV file),
             - numpy.ndarray will be stored as .npz,
             - PIL.Image will be stored to .png file and uploaded
         :param dict metadata: Simple key/value dictionary to store on the artifact
@@ -1260,7 +1261,7 @@ class Task(_Task):
                 only_fields=['id', 'name', 'last_update']
             )
         )
-        task = get_single_result(entity='task', query=task_name, results=res.response.tasks)
+        task = get_single_result(entity='task', query=task_name, results=res.response.tasks, raise_on_error=False)
 
         return cls(
             private=cls.__create_protection,