题目：
Mailing List Data - Part II
In this assignment you will visualize the mailing list data you have downloaded from http://mbox.dr-chuck.net/ and take some screen shots. Important: You do not have to download all of the data - it is completely acceptable to visualize a small subset of the data for this assignment.
Don't take off points for little mistakes. If they seem to have done the assignment give them full credit. Feel free to make suggestions if there are small mistakes. Please keep your comments positive and useful.
Sample solution: http://www.py4e.com/code3/gmane.zip
Please Upload Your Submission:
A screen shot of you running the gbasic.py program to compute basic histogram data on the messages you have retrieved.(Please use PNG or JPG files)
A screen shot of word cloud visualization for the messages you have retrieved.(Please use PNG or JPG files)
A screen shot of time line visualization for the messages you have retrieved.(Please use PNG or JPG files)
Optional Challenge: Change the gline.py program to show the message count by month instead of by year and take a screen shot to the by month visualization. You can switch from a by-year to a by-month visualization by changing only a few lines in gline.py. The puzzle is to figure out the smallest change to accomplish the change. If you do not want to do this optional challenge - just upload the above image a second time.(Please use PNG or JPG files)
作业步骤：
1、下载content.sqlite数据库：https://online.dr-chuck.com/files/sakai/email/content.sqlite（约600M）的数据，数据59059条。
2、运行gmodel.py,生成index.sqlite
3、运行gbasic.py
4、运行gword.py,然后打开gword.htm
运行gline.py,然后打开gline.htm