def handle_output(self, context: OutputContext, obj: bytes):
"""obj: bytes"""
check.inst_param(context, "context", OutputContext)
# the output notebook itself is stored at output_file_path
output_notebook_path = self._get_path(context)
mkdir_p(os.path.dirname(output_notebook_path))
with open(output_notebook_path, self.write_mode) as dest_file_obj:
dest_file_obj.write(obj)
yield MetadataEntry.fspath(path=output_notebook_path, label="path")
def handle_output(self, context, obj):
"""Pickle the data and store the object to a custom file path.
This method emits an AssetMaterialization event so the assets will be tracked by the
Asset Catalog.
"""
check.inst_param(context, "context", OutputContext)
metadata = context.metadata
path = check.str_param(metadata.get("path"), "metadata.path")
filepath = self._get_path(path)
# Ensure path exists
mkdir_p(os.path.dirname(filepath))
context.log.debug(f"Writing file at: {filepath}")
with open(filepath, self.write_mode) as write_obj:
pickle.dump(obj, write_obj, PICKLE_PROTOCOL)
return AssetMaterialization(
asset_key=AssetKey(
[context.pipeline_name, context.step_key, context.name]),
metadata_entries=[MetadataEntry.fspath(os.path.abspath(filepath))],
)
def _t_fn(step_context, inputs):
check.inst_param(step_context, "step_context", SolidExecutionContext)
check.param_invariant(
isinstance(step_context.run_config, dict),
"context",
"StepExecutionContext must have valid run_config",
)
step_execution_context = step_context.get_step_execution_context()
with tempfile.TemporaryDirectory() as output_notebook_dir:
with safe_tempfile_path() as output_log_path:
prefix = str(uuid.uuid4())
parameterized_notebook_path = os.path.join(
output_notebook_dir, f"{prefix}-inter.ipynb")
executed_notebook_path = os.path.join(output_notebook_dir,
f"{prefix}-out.ipynb")
# Scaffold the registration here
nb = load_notebook_node(notebook_path)
compute_descriptor = ("solid" if dagster_factory_name
== "define_dagstermill_solid" else "op")
nb_no_parameters = replace_parameters(
step_execution_context,
nb,
get_papermill_parameters(step_execution_context, inputs,
output_log_path,
compute_descriptor),
)
write_ipynb(nb_no_parameters, parameterized_notebook_path)
try:
papermill_engines.register("dagstermill",
DagstermillEngine)
papermill.execute_notebook(
input_path=parameterized_notebook_path,
output_path=executed_notebook_path,
engine_name="dagstermill",
log_output=True,
)
except Exception as ex:
step_execution_context.log.warn(
"Error when attempting to materialize executed notebook: {exc}"
.format(exc=str(
serializable_error_info_from_exc_info(
sys.exc_info()))))
# pylint: disable=no-member
# compat:
if isinstance(
ex,
ExecutionError) and (ex.ename == "RetryRequested"
or ex.ename == "Failure"):
step_execution_context.log.warn(
f"Encountered raised {ex.ename} in notebook. Use dagstermill.yield_event "
"with RetryRequested or Failure to trigger their behavior."
)
raise
step_execution_context.log.debug(
"Notebook execution complete for {name} at {executed_notebook_path}."
.format(
name=name,
executed_notebook_path=executed_notebook_path,
))
if output_notebook_name is not None:
# yield output notebook binary stream as a solid output
with open(executed_notebook_path, "rb") as fd:
yield Output(fd.read(), output_notebook_name)
else:
# backcompat
executed_notebook_file_handle = None
try:
# use binary mode when when moving the file since certain file_managers such as S3
# may try to hash the contents
with open(executed_notebook_path, "rb") as fd:
executed_notebook_file_handle = step_context.resources.file_manager.write(
fd, mode="wb", ext="ipynb")
executed_notebook_materialization_path = (
executed_notebook_file_handle.path_desc)
yield AssetMaterialization(
asset_key=(asset_key_prefix +
[f"{name}_output_notebook"]),
description=
"Location of output notebook in file manager",
metadata_entries=[
MetadataEntry.fspath(
executed_notebook_materialization_path)
],
)
except Exception:
# if file manager writing errors, e.g. file manager is not provided, we throw a warning
# and fall back to the previously stored temp executed notebook.
step_context.log.warning(
"Error when attempting to materialize executed notebook using file manager: "
f"{str(serializable_error_info_from_exc_info(sys.exc_info()))}"
f"\nNow falling back to local: notebook execution was temporarily materialized at {executed_notebook_path}"
"\nIf you have supplied a file manager and expect to use it for materializing the "
'notebook, please include "file_manager" in the `required_resource_keys` argument '
f"to `{dagster_factory_name}`")
if output_notebook is not None:
yield Output(executed_notebook_file_handle,
output_notebook)
# deferred import for perf
import scrapbook
output_nb = scrapbook.read_notebook(executed_notebook_path)
for (output_name,
_) in step_execution_context.solid_def.output_dict.items():
data_dict = output_nb.scraps.data_dict
if output_name in data_dict:
# read outputs that were passed out of process via io manager from `yield_result`
step_output_handle = StepOutputHandle(
step_key=step_execution_context.step.key,
output_name=output_name)
output_context = step_execution_context.get_output_context(
step_output_handle)
io_manager = step_execution_context.get_io_manager(
step_output_handle)
value = io_manager.load_input(
build_input_context(upstream_output=output_context))
yield Output(value, output_name)
for key, value in output_nb.scraps.items():
if key.startswith("event-"):
with open(value.data, "rb") as fd:
event = pickle.loads(fd.read())
if isinstance(event, (Failure, RetryRequested)):
raise event
else:
yield event