mySent = 'This book is the best book on python!'
print mySent.split()

['This', 'book', 'is', 'the', 'best', 'book', 'on', 'python!']

import re
reg = re.compile('\\W*')
mySent = 'This book is the best book on python!'
listof = reg.split(mySent)
print listof

['This', 'book', 'is', 'the', 'best', 'book', 'on', 'python', '']

import re
reg = re.compile('\\W*')
mySent = 'This book is the best book on python!'
listof = reg.split(mySent)
new_list = [tok for tok in listof if len(tok)>0]
print new_list

['This', 'book', 'is', 'the', 'best', 'book', 'on', 'python']

import re
reg = re.compile('\\W*')
mySent = 'This book is the best book on python!'
listof = reg.split(mySent)
new_list = [tok.lower() for tok in listof if len(tok)>0]
print new_list

['this', 'book', 'is', 'the', 'best', 'book', 'on', 'python']

Hi Peter,

With Jose out of town, do you want to
meet once in a while to keep things
going and do some interesting stuff"htmlcode">

import re
reg = re.compile('\\W*')
email = open('email.txt').read()
list = reg.split(email)
new_txt = [tok.lower() for tok in list if len(tok)>0]
print new_txt




输出：

复制代码 代码如下:['hi', 'peter', 'with', 'jose', 'out', 'of', 'town', 'do', 'you', 'want', 'to', 'meet', 'once', 'in', 'a', 'while', 'to', 'keep', 'things', 'going', 'and', 'do', 'some', 'interesting', 'stuff', 'let', 'me', 'know', 'eugene']
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