SimpleCsvWriterReaderSnippet

import csv

# Python Simple csv writer/reader snippets 

# NOTE: "rb" "wb" is important csv needs these to be opened in "binary" format

###################################################

# csv writer snippet

f_out = open(outputFile, 'wb')
writer = csv.writer(f_out, delimiter=',')
writer.writerow(["COL1", "COL2", "COL3"]) # make header row

# write your outputs
outRow = [val1, val2, val3]
writer.writerow(outRow)

###################################################

# csv reader snippet

with open(inputFile, "rb") as f_in :

    reader = csv.reader(f_in, delimiter=',')

    next(reader, None) # skip header row (assumes there is one)
            
    # if your data has a unique id/key, you can just throw in a dictionary for easy lookup later
    # in this example, row[0] (column 0) has the unqiue key
    csvDict = {row[0]:row for row in reader}