Je suis très novice en matière de Spark. Cet exemple est extrait du Structured Streaming Programming Guide de Spark :
from pyspark.sql import SparkSession
from pyspark.sql.functions import explode
from pyspark.sql.functions import split
spark = SparkSession \
.builder \
.appName("StructuredNetworkWordCount") \
.getOrCreate()
# Create DataFrame representing the stream of input lines from connection to localhost:9999
lines = spark \
.readStream \
.format("socket") \
.option("host", "localhost") \
.option("port", 9999) \
.load()
# Split the lines into words
words = lines.select(
explode(
split(lines.value, " ")
).alias("word")
)
# Generate running word count
wordCounts = words.groupBy("word").count()
# Start running the query that prints the running counts to the console
query = wordCounts \
.writeStream \
.outputMode("complete") \
.format("console") \
.start()
query.awaitTermination()
J'ai besoin de modifier ce code pour compter les mots qui commencent par la lettre "B" et qui ont plus de 6 comptes. Comment puis-je le faire ?