Append a .csv file?

[emerger]

Hello.
Is there a way to append a .csv file? Everything I've tried writes over the existing data in a .csv file with new data. Isn't there code in python 3.6 to append a .csv file like you would a .txt file?
Pete

[nilamo]

https://docs.python.org/3/library/functions.html#open
Open the file in Append (a) mode, instead of Write (w) mode:

with open('myfile.csv', 'a') as the_file:
    print("spam,foo,bar,test", file=the_file)