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Add UDF type hinting #8361

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Merged
merged 3 commits into from
Sep 27, 2022
Merged

Add UDF type hinting #8361

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7855302
fixed jvm error
bradmiro Sep 27, 2022
d528fde
add type hinting to UDF
bradmiro Sep 27, 2022
45c076d
Merge branch 'kaiyang_expansion_project' into bmiro_kaiyang_edit
bradmiro Sep 27, 2022
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9 changes: 8 additions & 1 deletion composer/2022_airflow_summit/data_analytics_process_expansion.py
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Original file line number Diff line number Diff line change
Expand Up @@ -103,7 +103,7 @@

# Inverse Distance Weighting algorithm (DWA)
@f.pandas_udf("YEAR integer, VALUE double", f.PandasUDFType.GROUPED_MAP)
def phx_dw_compute(year, df) -> pd.DataFrame:
def phx_dw_compute(year: tuple, df: pd.DataFrame) -> pd.DataFrame:
# This adjusts the rainfall / snowfall in Phoenix for a given year using Inverse Distance Weighting
# based on each weather station's distance to Phoenix. The closer a station is to Phoenix, the higher
# its measurement is weighed.
Expand All @@ -119,6 +119,13 @@ def phx_dw_compute(year, df) -> pd.DataFrame:
# so we negate the square and square root to combine this into:
#
# idf = 1 / ((x1-x2)^2 + (y1-y2)^2))
#
# Args:
# year: a tuple containing a single 4-digit integer value for this group's year
# df: a pandas dataframe
#
# Returns:
# A new pandas dataframe

# Latitude and longitude of Phoenix
PHX_LATITUDE = 33.4484
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