In PySpark,fillna() from DataFrame class or fill() from DataFrameNaFunctions is used to replace NULL/None values on all or selected multiple columns with either zero(0), empty string, space, or any constant lit
from pyspark.streaming import StreamingContext # Create a local StreamingContext with two working thread and batch interval of 1 second sc = SparkContext("local[2]", "NetworkWordCount") ssc = StreamingContext(sc, 1) 1. 2. 3. 4. 5. 6. 为了初始化一个Spark Streaming程序,必须创建一个Streami...