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[BEAM-13867] Drop NaNs returned by nlargest in flight_delays example pipeline #16801

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Feb 10, 2022
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[BEAM-13867] Drop NaNs returned by nlargest in flight_delays example pipeline #16801

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8 changes: 5 additions & 3 deletions sdks/python/apache_beam/examples/dataframe/flight_delays.py
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Original file line number Diff line number Diff line change
Expand Up @@ -37,9 +37,11 @@ def get_mean_delay_at_top_airports(airline_df):
'departure_airport': 'airport'
}).airport.value_counts()
total = arr + dep
# Note we keep all to include duplicates.
# This ensures the result is deterministic
top_airports = total.nlargest(10, keep='all')
# Note we keep all to include duplicates - this ensures the result is
# deterministic.
# NaNs can be included in the output in pandas 1.4.0 and above, so we
# explicitly drop them.
top_airports = total.nlargest(10, keep='all').dropna()
at_top_airports = airline_df['arrival_airport'].isin(
top_airports.index.values)
return airline_df[at_top_airports].mean()
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