github.com/apache/beam/sdks/v2@v2.48.2/python/apache_beam/testing/benchmarks/nexmark/queries/query1.py (about)

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    17  
    18  """Nexmark Query 1: Convert bid prices from dollars to euros.
    19  
    20  The Nexmark suite is a series of queries (streaming pipelines) performed
    21  on a simulation of auction events.
    22  
    23  This query converts bid prices from dollars to euros.
    24  It illustrates a simple map.
    25  """
    26  # pytype: skip-file
    27  
    28  import apache_beam as beam
    29  from apache_beam.testing.benchmarks.nexmark.models import nexmark_model
    30  from apache_beam.testing.benchmarks.nexmark.queries import nexmark_query_util
    31  
    32  USD_TO_EURO = 0.89
    33  
    34  
    35  def load(events, metadata=None, pipeline_options=None):
    36    return (
    37        events
    38        | nexmark_query_util.JustBids()
    39        | 'ConvertToEuro' >> beam.Map(
    40            lambda bid: nexmark_model.Bid(
    41                bid.auction,
    42                bid.bidder,
    43                bid.price * USD_TO_EURO,
    44                bid.date_time,
    45                bid.extra)))