【Python】TypeError: 'module' object is not callable 原因分析

**原因分析：
Python导入模块的方法有两种：import module 和 from module import，区别是前者所有导入的东西使用时需加上模块名的限定，而后者不要。**

from bs4 import BeautifulSoup

markup = "<b><!--Hey, buddy. Want to buy a used parser?--></b>"
soup = BeautifulSoup(markup)
comment = soup.b.string
type(comment)
print comment

import BeautifulSoup

markup = "<b><!--Hey, buddy. Want to buy a used parser?--></b>"
soup = BeautifulSoup.BeautifulSoup(markup)
comment = soup.b.string
type(comment)
print comment