df = df.dropna() #去掉空行

content = df.content.values.tolist()

Today is a tough day for me. I literarily felt depressed all day. And I can't do anything, because I have trouble focusing on my project.

Not all because of my mood, I think my project's difficulty is also the main reason why I felt so depressed. This time our progress is to finish the topic modeling program.

http://wiki.jikexueyuan.com/project/start-learning-python/311.html

Beautiful Soup 的用法

http://wiki.jikexueyuan.com/project/python-crawler-guide/beautiful-soup.html