How to load all csv files in a folder with pyspark

I have a folder which has

Sales_December.csv
Sales_January.csv
Sales_February.csv
etc.

How can i make pyspark read all of them into 1 dataframe?

>Solution :

• create an empty list
• read your csv files one by one and append DataFrames to the list
• use reduce(DataFrame.unionAll, <list>) to combine them
  into one single DataFrame