I have been really looking for sources in the web but I am still not finding the right information so I hope someone with expertise with Google DataFlow Python can answer. So basically I have CSV file with many columns and one of the Column that I need to process Date. I created a Year column (new filed) in the Transform part and I want to create a callable function to process the "Date" column to return the year part. SS So my problem basically is I dont know how to write a proper Python Callable to do what I want. Hope someone can help or point me to a proper resource site to be able to learn more about this topic. Continue reading...
