Use the script get_tweets.py to download the last 100 tweets (or whatever number you choose) from any Twitter user.
(1) You need to get your Twitter API Credentials by creating a new app at developer.twitter.com.
(2) This script uses Tweepy. If you don't have Tweepy installed you need to run this command on the terminal first:
$ sudo pip install tweepy
Now you're ready to clone and use the get_tweets script.
$ git clone https://github.com/gitlaura/get_tweets.git
$ cd get_tweets
Enter the appropriate keys from your Twitter app in lines 11-15 of get_tweets.py using any text editor.
Finally you can run the script by entering one Twitter username at the command line:
$ python get_tweets.py [twitter_username]
http://www.getlaura.com/how-to-download-tweets-from-the-twitter-api/