Support Task.get_task() without project name (i.e. all projects)

trains/task.py

@@ -274,8 +274,9 @@ class Task(_Task):
                     'xgboost': True, 'scikit': True}
 
         :type auto_connect_frameworks: bool or dict
-        :param bool auto_resource_monitoring: Automatically create machine resource monitoring plots? These plots appear in
+        :param bool auto_resource_monitoring: Automatically create machine resource monitoring plots?
-            in the **Trains Web-App (UI)**, **RESULTS** tab, **SCALARS** sub-tab, with a title of **:resource monitor:**.
+            These plots appear in in the **Trains Web-App (UI)**, **RESULTS** tab, **SCALARS** sub-tab,
+            with a title of **:resource monitor:**.
 
             The values are:
 
@@ -433,7 +434,8 @@ class Task(_Task):
                     PatchXGBoostModelIO.update_current_task(task)
             if auto_resource_monitoring and not is_sub_process_task_id:
                 task._resource_monitor = ResourceMonitor(
-                    task, report_mem_used_per_process=not config.get('development.worker.report_global_mem_used', False))
+                    task, report_mem_used_per_process=not config.get(
+                        'development.worker.report_global_mem_used', False))
                 task._resource_monitor.start()
 
             # make sure all random generators are initialized with new seed
@@ -567,7 +569,8 @@ class Task(_Task):
         :param dict task_filter: filter and order Tasks. See service.tasks.GetAllRequest for details
         :return: The Tasks specified by the parameter combinations (see the parameters).
         """
-        return cls.__get_tasks(task_ids=task_ids, project_name=project_name, task_name=task_name, **(task_filter or {}))
+        return cls.__get_tasks(task_ids=task_ids, project_name=project_name,
+                               task_name=task_name, **(task_filter or {}))
 
     @property
     def output_uri(self):
@@ -640,7 +643,8 @@ class Task(_Task):
         """
         assert isinstance(source_task, (six.string_types, Task))
         if not Session.check_min_api_version('2.4'):
-            raise ValueError("Trains-server does not support DevOps features, upgrade trains-server to 0.12.0 or above")
+            raise ValueError("Trains-server does not support DevOps features, "
+                             "upgrade trains-server to 0.12.0 or above")
 
         task_id = source_task if isinstance(source_task, six.string_types) else source_task.id
         if not parent:
@@ -702,7 +706,8 @@ class Task(_Task):
         """
         assert isinstance(task, (six.string_types, Task))
         if not Session.check_min_api_version('2.4'):
-            raise ValueError("Trains-server does not support DevOps features, upgrade trains-server to 0.12.0 or above")
+            raise ValueError("Trains-server does not support DevOps features, "
+                             "upgrade trains-server to 0.12.0 or above")
 
         task_id = task if isinstance(task, six.string_types) else task.id
         session = cls._get_default_session()
@@ -754,14 +759,16 @@ class Task(_Task):
           - ``status_reason`` - The reason for the last status change.
           - ``status_message`` - Information about the status.
           - ``status_changed`` - The last status change date and time in ISO 8601 format.
-          - ``last_update`` - The last time the Task was created, updated, changed or events for this task were reported.
+          - ``last_update`` - The last time the Task was created, updated,
+                changed or events for this task were reported.
           - ``execution.queue`` - The Id of the queue where the Task is enqueued. ``null`` indicates not enqueued.
 
         - ``updated`` - The number of Tasks updated (an integer or ``null``).
         """
         assert isinstance(task, (six.string_types, Task))
         if not Session.check_min_api_version('2.4'):
-            raise ValueError("Trains-server does not support DevOps features, upgrade trains-server to 0.12.0 or above")
+            raise ValueError("Trains-server does not support DevOps features, "
+                             "upgrade trains-server to 0.12.0 or above")
 
         task_id = task if isinstance(task, six.string_types) else task.id
         session = cls._get_default_session()
@@ -1366,8 +1373,8 @@ class Task(_Task):
         """
         Set Task model configuration text/dict
 
-        :param config_text: model configuration (unconstrained text string). usually the content of a configuration file.
+        :param config_text: model configuration (unconstrained text string). usually the content
-            If `config_text` is not None, `config_dict` must not be provided.
+            of a configuration file. If `config_text` is not None, `config_dict` must not be provided.
         :param config_dict: model configuration parameters dictionary.
             If `config_dict` is not None, `config_text` must not be provided.
         """
@@ -1532,7 +1539,7 @@ class Task(_Task):
         thread = threading.Thread(target=LoggerRoot.flush)
         thread.daemon = True
         thread.start()
-        
+
         return task
 
     def _get_logger(self, flush_period=NotSet):
@@ -1660,7 +1667,8 @@ class Task(_Task):
         if running_remotely() and self.is_main_task():
             self._arguments.copy_to_parser(parser, parsed_args)
         else:
-            self._arguments.copy_defaults_from_argparse(parser, args=args, namespace=namespace, parsed_args=parsed_args)
+            self._arguments.copy_defaults_from_argparse(
+                parser, args=args, namespace=namespace, parsed_args=parsed_args)
         return parser
 
     def _connect_dictionary(self, dictionary):
@@ -2096,19 +2104,22 @@ class Task(_Task):
         if task_id:
             return cls(private=cls.__create_protection, task_id=task_id, log_to_backend=False)
 
-        res = cls._send(
+        if project_name:
-            cls._get_default_session(),
+            res = cls._send(
-            projects.GetAllRequest(
+                cls._get_default_session(),
-                name=exact_match_regex(project_name)
+                projects.GetAllRequest(
+                    name=exact_match_regex(project_name)
+                )
             )
-        )
+            project = get_single_result(entity='project', query=project_name, results=res.response.projects)
-        project = get_single_result(entity='project', query=project_name, results=res.response.projects)
+        else:
+            project = None
 
         system_tags = 'system_tags' if hasattr(tasks.Task, 'system_tags') else 'tags'
         res = cls._send(
             cls._get_default_session(),
             tasks.GetAllRequest(
-                project=[project.id],
+                project=[project.id] if project else None,
                 name=exact_match_regex(task_name) if task_name else None,
                 only_fields=['id', 'name', 'last_update', system_tags]
             )
@@ -2188,7 +2199,8 @@ class Task(_Task):
 
     @classmethod
     def __get_last_used_task_id(cls, default_project_name, default_task_name, default_task_type):
-        hash_key = cls.__get_hash_key(cls._get_api_server(), default_project_name, default_task_name, default_task_type)
+        hash_key = cls.__get_hash_key(
+            cls._get_api_server(), default_project_name, default_task_name, default_task_type)
 
         # check if we have a cached task_id we can reuse
         # it must be from within the last 24h and with the same project/name/type
@@ -2213,7 +2225,8 @@ class Task(_Task):
 
     @classmethod
     def __update_last_used_task_id(cls, default_project_name, default_task_name, default_task_type, task_id):
-        hash_key = cls.__get_hash_key(cls._get_api_server(), default_project_name, default_task_name, default_task_type)
+        hash_key = cls.__get_hash_key(
+            cls._get_api_server(), default_project_name, default_task_name, default_task_type)
 
         task_id = str(task_id)
         # update task session cache