HHH questions

• How to find time spent by mappers and reducers in Hadoop?
• How to write a condition based on multiple values for a DataFrame in Spark
• integrating scikit-learn with pyspark
• How to pass an argument to the main program in Hadoop
• How to use BLAS library in Spark?
• How to apply a function of all elements of n Array?
• How to do a majority voting on columns in pandas
• How to do aggregation on multiple columns at once in Spark
• How to select top n row from each group after group by in pandas?
• How to convert int64 to datetime in pandas

HHH answers