Question

How to return N/A in python?

Answer 1

am new to Scraperwiki and Python, and trying to figure out how to return "NA" or something similar when there is no item on a scraped webpage that meets my cssselect specifications.
In my code below, I am scraping a double-nested set of webpages. When I scrape a sub-page that does not have a value for the cssselect attribute, it simply copies the value of the last scraped page for which there was a value.

Answer 2

To return N/A in python:

• There are various ways to tackle this problem:

        1.) To replace null values with a space (" ").

        2.) To replace null values with mean/median/mode of the respective

              columns.

        3.) To delete the record/row containing null value.

• Import pandas from library.
• Create pandas data frame and import csv file into it.
• Check the number of rows and columns in the data frame.
• Check for null values.
• Check the sum of NA values.