forked from feast-dev/feast
-
Notifications
You must be signed in to change notification settings - Fork 0
/
on_demand_feature_view.py
406 lines (364 loc) · 16.1 KB
/
on_demand_feature_view.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
import copy
import functools
import warnings
from types import MethodType
from typing import Dict, List, Optional, Type, Union
import dill
import pandas as pd
from feast.base_feature_view import BaseFeatureView
from feast.data_source import RequestSource
from feast.errors import RegistryInferenceFailure, SpecifiedFeaturesNotPresentError
from feast.feature import Feature
from feast.feature_view import FeatureView
from feast.feature_view_projection import FeatureViewProjection
from feast.protos.feast.core.OnDemandFeatureView_pb2 import (
OnDemandFeatureView as OnDemandFeatureViewProto,
)
from feast.protos.feast.core.OnDemandFeatureView_pb2 import (
OnDemandFeatureViewMeta,
OnDemandFeatureViewSpec,
OnDemandSource,
)
from feast.protos.feast.core.OnDemandFeatureView_pb2 import (
UserDefinedFunction as UserDefinedFunctionProto,
)
from feast.type_map import (
feast_value_type_to_pandas_type,
python_type_to_feast_value_type,
)
from feast.usage import log_exceptions
from feast.value_type import ValueType
warnings.simplefilter("once", DeprecationWarning)
class OnDemandFeatureView(BaseFeatureView):
"""
[Experimental] An OnDemandFeatureView defines a logical group of features that are
generated by applying a transformation on a set of input sources, such as feature
views and request data sources.
Attributes:
name: The unique name of the on demand feature view.
features: The list of features in the output of the on demand feature view.
source_feature_view_projections: A map from input source names to actual input
sources with type FeatureViewProjection.
source_request_sources: A map from input source names to the actual input
sources with type RequestSource.
udf: The user defined transformation function, which must take pandas dataframes
as inputs.
description: A human-readable description.
tags: A dictionary of key-value pairs to store arbitrary metadata.
owner: The owner of the on demand feature view, typically the email of the primary
maintainer.
"""
# TODO(adchia): remove inputs from proto and declaration
name: str
features: List[Feature]
source_feature_view_projections: Dict[str, FeatureViewProjection]
source_request_sources: Dict[str, RequestSource]
udf: MethodType
description: str
tags: Dict[str, str]
owner: str
@log_exceptions
def __init__(
self,
name: str,
features: List[Feature],
sources: Optional[
Dict[str, Union[FeatureView, FeatureViewProjection, RequestSource]]
] = None,
udf: Optional[MethodType] = None,
inputs: Optional[
Dict[str, Union[FeatureView, FeatureViewProjection, RequestSource]]
] = None,
description: str = "",
tags: Optional[Dict[str, str]] = None,
owner: str = "",
):
"""
Creates an OnDemandFeatureView object.
Args:
name: The unique name of the on demand feature view.
features: The list of features in the output of the on demand feature view, after
the transformation has been applied.
sources (optional): A map from input source names to the actual input sources,
which may be feature views, feature view projections, or request data sources.
These sources serve as inputs to the udf, which will refer to them by name.
udf (optional): The user defined transformation function, which must take pandas
dataframes as inputs.
inputs (optional): A map from input source names to the actual input sources,
which may be feature views, feature view projections, or request data sources.
These sources serve as inputs to the udf, which will refer to them by name.
description (optional): A human-readable description.
tags (optional): A dictionary of key-value pairs to store arbitrary metadata.
owner (optional): The owner of the on demand feature view, typically the email
of the primary maintainer.
"""
super().__init__(
name=name,
features=features,
description=description,
tags=tags,
owner=owner,
)
if inputs and sources:
raise ValueError("At most one of `sources` or `inputs` can be specified.")
elif inputs:
warnings.warn(
(
"The `inputs` parameter is being deprecated. Please use `sources` instead. "
"Feast 0.21 and onwards will not support the `inputs` parameter."
),
DeprecationWarning,
)
sources = inputs
elif not inputs and not sources:
raise ValueError("At least one of `inputs` or `sources` must be specified.")
assert sources is not None
self.source_feature_view_projections: Dict[str, FeatureViewProjection] = {}
self.source_request_sources: Dict[str, RequestSource] = {}
for source_name, odfv_source in sources.items():
if isinstance(odfv_source, RequestSource):
self.source_request_sources[source_name] = odfv_source
elif isinstance(odfv_source, FeatureViewProjection):
self.source_feature_view_projections[source_name] = odfv_source
else:
self.source_feature_view_projections[
source_name
] = odfv_source.projection
if udf is None:
raise ValueError("The `udf` parameter must be specified.")
assert udf
self.udf = udf
@property
def proto_class(self) -> Type[OnDemandFeatureViewProto]:
return OnDemandFeatureViewProto
def __copy__(self):
fv = OnDemandFeatureView(
name=self.name,
features=self.features,
sources=dict(
**self.source_feature_view_projections, **self.source_request_sources,
),
udf=self.udf,
description=self.description,
tags=self.tags,
owner=self.owner,
)
fv.projection = copy.copy(self.projection)
return fv
def __eq__(self, other):
if not super().__eq__(other):
return False
if (
not self.source_feature_view_projections
== other.source_feature_view_projections
or not self.source_request_sources == other.source_request_sources
or not self.udf.__code__.co_code == other.udf.__code__.co_code
):
return False
return True
def __hash__(self):
return super().__hash__()
def to_proto(self) -> OnDemandFeatureViewProto:
"""
Converts an on demand feature view object to its protobuf representation.
Returns:
A OnDemandFeatureViewProto protobuf.
"""
meta = OnDemandFeatureViewMeta()
if self.created_timestamp:
meta.created_timestamp.FromDatetime(self.created_timestamp)
if self.last_updated_timestamp:
meta.last_updated_timestamp.FromDatetime(self.last_updated_timestamp)
sources = {}
for source_name, fv_projection in self.source_feature_view_projections.items():
sources[source_name] = OnDemandSource(
feature_view_projection=fv_projection.to_proto()
)
for (source_name, request_sources,) in self.source_request_sources.items():
sources[source_name] = OnDemandSource(
request_data_source=request_sources.to_proto()
)
spec = OnDemandFeatureViewSpec(
name=self.name,
features=[feature.to_proto() for feature in self.features],
sources=sources,
user_defined_function=UserDefinedFunctionProto(
name=self.udf.__name__, body=dill.dumps(self.udf, recurse=True),
),
description=self.description,
tags=self.tags,
owner=self.owner,
)
return OnDemandFeatureViewProto(spec=spec, meta=meta)
@classmethod
def from_proto(cls, on_demand_feature_view_proto: OnDemandFeatureViewProto):
"""
Creates an on demand feature view from a protobuf representation.
Args:
on_demand_feature_view_proto: A protobuf representation of an on-demand feature view.
Returns:
A OnDemandFeatureView object based on the on-demand feature view protobuf.
"""
sources = {}
for (
source_name,
on_demand_source,
) in on_demand_feature_view_proto.spec.sources.items():
if on_demand_source.WhichOneof("source") == "feature_view":
sources[source_name] = FeatureView.from_proto(
on_demand_source.feature_view
).projection
elif on_demand_source.WhichOneof("source") == "feature_view_projection":
sources[source_name] = FeatureViewProjection.from_proto(
on_demand_source.feature_view_projection
)
else:
sources[source_name] = RequestSource.from_proto(
on_demand_source.request_data_source
)
on_demand_feature_view_obj = cls(
name=on_demand_feature_view_proto.spec.name,
features=[
Feature(
name=feature.name,
dtype=ValueType(feature.value_type),
labels=dict(feature.labels),
)
for feature in on_demand_feature_view_proto.spec.features
],
sources=sources,
udf=dill.loads(
on_demand_feature_view_proto.spec.user_defined_function.body
),
description=on_demand_feature_view_proto.spec.description,
tags=dict(on_demand_feature_view_proto.spec.tags),
owner=on_demand_feature_view_proto.spec.owner,
)
# FeatureViewProjections are not saved in the OnDemandFeatureView proto.
# Create the default projection.
on_demand_feature_view_obj.projection = FeatureViewProjection.from_definition(
on_demand_feature_view_obj
)
if on_demand_feature_view_proto.meta.HasField("created_timestamp"):
on_demand_feature_view_obj.created_timestamp = (
on_demand_feature_view_proto.meta.created_timestamp.ToDatetime()
)
if on_demand_feature_view_proto.meta.HasField("last_updated_timestamp"):
on_demand_feature_view_obj.last_updated_timestamp = (
on_demand_feature_view_proto.meta.last_updated_timestamp.ToDatetime()
)
return on_demand_feature_view_obj
def get_request_data_schema(self) -> Dict[str, ValueType]:
schema: Dict[str, ValueType] = {}
for request_source in self.source_request_sources.values():
schema.update(request_source.schema)
return schema
def get_transformed_features_df(
self, df_with_features: pd.DataFrame, full_feature_names: bool = False,
) -> pd.DataFrame:
# Apply on demand transformations
columns_to_cleanup = []
for source_fv_projection in self.source_feature_view_projections.values():
for feature in source_fv_projection.features:
full_feature_ref = f"{source_fv_projection.name}__{feature.name}"
if full_feature_ref in df_with_features.keys():
# Make sure the partial feature name is always present
df_with_features[feature.name] = df_with_features[full_feature_ref]
columns_to_cleanup.append(feature.name)
elif feature.name in df_with_features.keys():
# Make sure the full feature name is always present
df_with_features[full_feature_ref] = df_with_features[feature.name]
columns_to_cleanup.append(full_feature_ref)
# Compute transformed values and apply to each result row
df_with_transformed_features = self.udf.__call__(df_with_features)
# Work out whether the correct columns names are used.
rename_columns: Dict[str, str] = {}
for feature in self.features:
short_name = feature.name
long_name = f"{self.projection.name_to_use()}__{feature.name}"
if (
short_name in df_with_transformed_features.columns
and full_feature_names
):
rename_columns[short_name] = long_name
elif not full_feature_names:
# Long name must be in dataframe.
rename_columns[long_name] = short_name
# Cleanup extra columns used for transformation
df_with_features.drop(columns=columns_to_cleanup, inplace=True)
return df_with_transformed_features.rename(columns=rename_columns)
def infer_features(self):
"""
Infers the set of features associated to this feature view from the input source.
Raises:
RegistryInferenceFailure: The set of features could not be inferred.
"""
df = pd.DataFrame()
for feature_view_projection in self.source_feature_view_projections.values():
for feature in feature_view_projection.features:
dtype = feast_value_type_to_pandas_type(feature.dtype)
df[f"{feature_view_projection.name}__{feature.name}"] = pd.Series(
dtype=dtype
)
df[f"{feature.name}"] = pd.Series(dtype=dtype)
for request_data in self.source_request_sources.values():
for feature_name, feature_type in request_data.schema.items():
dtype = feast_value_type_to_pandas_type(feature_type)
df[f"{feature_name}"] = pd.Series(dtype=dtype)
output_df: pd.DataFrame = self.udf.__call__(df)
inferred_features = []
for f, dt in zip(output_df.columns, output_df.dtypes):
inferred_features.append(
Feature(
name=f, dtype=python_type_to_feast_value_type(f, type_name=str(dt))
)
)
if self.features:
missing_features = []
for specified_features in self.features:
if specified_features not in inferred_features:
missing_features.append(specified_features)
if missing_features:
raise SpecifiedFeaturesNotPresentError(
[f.name for f in missing_features], self.name
)
else:
self.features = inferred_features
if not self.features:
raise RegistryInferenceFailure(
"OnDemandFeatureView",
f"Could not infer Features for the feature view '{self.name}'.",
)
@staticmethod
def get_requested_odfvs(feature_refs, project, registry):
all_on_demand_feature_views = registry.list_on_demand_feature_views(
project, allow_cache=True
)
requested_on_demand_feature_views: List[OnDemandFeatureView] = []
for odfv in all_on_demand_feature_views:
for feature in odfv.features:
if f"{odfv.name}:{feature.name}" in feature_refs:
requested_on_demand_feature_views.append(odfv)
break
return requested_on_demand_feature_views
def on_demand_feature_view(
features: List[Feature], sources: Dict[str, Union[FeatureView, RequestSource]]
):
"""
Declare an on-demand feature view
:param features: Output schema with feature names
:param sources: The sources passed into the transform.
:return: An On Demand Feature View.
"""
def decorator(user_function):
on_demand_feature_view_obj = OnDemandFeatureView(
name=user_function.__name__,
sources=sources,
features=features,
udf=user_function,
)
functools.update_wrapper(
wrapper=on_demand_feature_view_obj, wrapped=user_function
)
return on_demand_feature_view_obj
return decorator