Get tweets by multiple Usernames

Hi.
I want to obtain the tweets of a lot of usernames. But I don't want to write the comand in the terminal a lot of times. I try this:

usernames = ["name1", "name2", ..... "nameX"]

for i in usernames:
tweetCriteria.username = i
got.manager.TweetManager.getTweets(tweetCriteria, receiveBuffer)

But doesn't work, the output.csv result is empty. Any idea?
Thank You.