Create Web-user.py

 Add Web-user.py for PySpark and update contributors list

This pull request adds the Web-user.py script for PySpark functionality and includes myself (divith raju) in the contributors list.

Author: divithraju

Web-user.py

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+# Find the count of unique visitors to a website per day.
+
+from pyspark.sql import SparkSession, Row
+from pyspark.sql.functions import countDistinct
+
+# Initialize Spark session
+spark = SparkSession.builder.appName("UniqueVisitorsPerDay").getOrCreate()
+
+# Sample data
+visitor_data = [Row(Date='2023-01-01', VisitorID=101),
+                Row(Date='2023-01-01', VisitorID=102),
+                Row(Date='2023-01-01', VisitorID=101),
+                Row(Date='2023-01-02', VisitorID=103),
+                Row(Date='2023-01-02', VisitorID=101)]
+
+# Create DataFrame
+df_visitors = spark.createDataFrame(visitor_data)
+
+# Count unique visitors per day
+unique_visitors = df_visitors.groupBy('Date').agg(countDistinct('VisitorID').alias('UniqueVisitors'))
+
+# Show results
+unique_visitors.show()