Gather and expose errors

docs/for_pandas.rst

@@ -53,7 +53,7 @@ Please refer to :func:`~gokart.task.TaskOnKart.load`.
 Fail on empty DataFrame
 -----------------------
 
-When the :attr:`~gokart.task.TaskOnKart.fail_on_empty_dump` parameter is true, the :func:`~gokart.task.TaskOnKart.dump()` method raises :class:`~gokart.task.EmptyDumpError` on trying to dump empty ``pandas.DataFrame``.
+When the :attr:`~gokart.task.TaskOnKart.fail_on_empty_dump` parameter is true, the :func:`~gokart.task.TaskOnKart.dump()` method raises :class:`~gokart.errors.EmptyDumpError` on trying to dump empty ``pandas.DataFrame``.
 
 
 .. code:: python

gokart/build.py

@@ -41,13 +41,15 @@ def __exit__(self, exception_type, exception_value, traceback):
 
 
 class GokartBuildError(Exception):
-    def __init__(self, messsage, raised_exceptions: dict[str, list[Exception]]):
-        super().__init__(messsage)
+    """Raised when ``gokart.build`` failed. This exception contains raised exceptions in the task execution."""
+
+    def __init__(self, message, raised_exceptions: dict[str, list[Exception]]):
+        super().__init__(message)
         self.raised_exceptions = raised_exceptions
 
 
 class HasLockedTaskException(Exception):
-    pass
+    """Raised when the task failed to acquire the lock in the task execution."""
 
 
 class TaskLockExceptionRaisedFlag:

gokart/conflict_prevention_lock/task_lock.py

@@ -23,6 +23,7 @@ class TaskLockParams(NamedTuple):
 
 class TaskLockException(Exception):
     pass
+    """Raised when the task failed to acquire the lock in the task execution. Only used internally."""
 
 
 class RedisClient:

gokart/errors/__init__.py

@@ -0,0 +1,10 @@
+from gokart.build import GokartBuildError, HasLockedTaskException
+from gokart.pandas_type_config import PandasTypeError
+from gokart.task import EmptyDumpError
+
+__all__ = [
+    'GokartBuildError',
+    'HasLockedTaskException',
+    'PandasTypeError',
+    'EmptyDumpError',
+]

gokart/pandas_type_config.py

@@ -13,7 +13,7 @@
 
 
 class PandasTypeError(Exception):
-    pass
+    """Raised when the type of the pandas DataFrame column is not as expected."""
 
 
 class PandasTypeConfig(luigi.Config):

gokart/slack/__init__.py

@@ -1,3 +1,14 @@
-from gokart.slack.event_aggregator import EventAggregator  # noqa:F401
-from gokart.slack.slack_api import SlackAPI  # noqa:F401
-from gokart.slack.slack_config import SlackConfig  # noqa:F401
+from gokart.slack.event_aggregator import EventAggregator
+from gokart.slack.slack_api import SlackAPI
+from gokart.slack.slack_config import SlackConfig
+
+from .slack_api import ChannelListNotLoadedError, ChannelNotFoundError, FileNotUploadedError
+
+__all__ = [
+    'ChannelListNotLoadedError',
+    'ChannelNotFoundError',
+    'FileNotUploadedError',
+    'EventAggregator',
+    'SlackAPI',
+    'SlackConfig',
+]

gokart/task.py

@@ -35,7 +35,7 @@
 
 # NOTE: inherited from AssertionError for backward compatibility (Formerly, Gokart raises that exception when a task dumps an empty DataFrame).
 class EmptyDumpError(AssertionError):
-    """Attempted to dump an empty DataFrame even though it is prohibited (fail_on_empty_dump is set to True)."""
+    """Raised when the task attempts to dump an empty DataFrame even though it is prohibited (``fail_on_empty_dump`` is set to True)"""
 
 
 class TaskOnKart(luigi.Task, Generic[T]):