python 截取 取出一部分的字符串

From: https://blog.csdn.net/q1059081877q/article/details/50687683

>>> str = 'http://manualfile.s3.amazonaws.com/pdf/gti-chis-1-user-9fb-0-7a05a56f0b91.pdf'
>>> print str.split()
['http://manualfile.s3.amazonaws.com/pdf/gti-chis-1-user-9fb-0-7a05a56f0b91.pdf']
>>> print str.split('/')
['http:', '', 'manualfile.s3.amazonaws.com', 'pdf', 'gti-chis-1-user-9fb-0-7a05a56f0b91.pdf']
>>> print str.split('/')[-1]
gti-chis-1-user-9fb-0-7a05a56f0b91.pdf
>>> print str.split('/')[-1].split('.')[0]
gti-chis-1-user-9fb-0-7a05a56f0b91