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"""Nexmark Query 1: Convert bid prices from dollars to euros.
The Nexmark suite is a series of queries (streaming pipelines) performed
on a simulation of auction events.
This query converts bid prices from dollars to euros.
It illustrates a simple map.
"""
# pytype: skip-file
import apache_beam as beam
from apache_beam.testing.benchmarks.nexmark.models import nexmark_model
from apache_beam.testing.benchmarks.nexmark.queries import nexmark_query_util
USD_TO_EURO = 0.89
[docs]def load(events, metadata=None, pipeline_options=None):
return (
events
| nexmark_query_util.JustBids()
| 'ConvertToEuro' >> beam.Map(
lambda bid: nexmark_model.Bid(
bid.auction,
bid.bidder,
bid.price * USD_TO_EURO,
bid.date_time,
bid.extra)))