Spark 2.4.7

[Harry Jamison]

I am using python 3.7 and Spark 2.4.7
I am not sure what the best way to do this is.
I have a dataframe with a url in one of the columns, and I want to download the 
contents of that url and put it in a new column.
Can someone point me in the right direction on how to do this?I looked at the 
UDFs and they seem confusing to me.
Also, is there a good way to rate limit the number of calls I make per second?