This is used to check which technologies the website uses. If no technology is used, the returned information will be less. The author can check more websites!

In [5]: import builtwith

In [6]: builtwith.parse('http://httpbin.org')
Out[6]: {u'web-servers': [u'Nginx']}

In [7]: builtwith.parse('http://ctb988.com')
Out[7]: {u'programming-languages': [u'Java']}

In [8]: builtwith.parse('http://m8128.com')
Out[8]: {u'programming-languages': [u'Java'], u'web-frameworks': [u'JavaServer Pages']}

In [9]: builtwith.parse('http://www.douban.com')
Out[9]: 
{u'analytics': [u'Piwik'],
 u'javascript-frameworks': [u'jQuery'],
 u'tag-managers': [u'Google Tag Manager']}

In [10]: builtwith.parse('http://example.webscraping.com')
Out[10]: 
{u'javascript-frameworks': [u'jQuery', u'Modernizr', u'jQuery UI'],
 u'programming-languages': [u'Python'],
 u'web-frameworks': [u'Web2py', u'Twitter Bootstrap'],
 u'web-servers': [u'Nginx']}