python 之 re模块、hashlib模块

print(re.findall('^ebn$','ebn1'))                               #[]
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print(re.findall('href="(.*?)"','<li><a id="blog_nav_sitehome" class="menu"href="http://www.cnblogs.com/">博客园</a></li>')
)                                                            #['http://www.cnblogs.com/']
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print(re.findall('a[0-9][0-9]c','a1c a+c a2c a9c a11c a-c acc aAc'))#[]:匹配一个指定范围内的字符（这一个字符来自于括号内定义的）                                      #['a11c']
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print(re.findall('a[-+*]c','a1c a+c a2c a9c a*c a11c a-c acc aAc')) #当-需要被当普通符号匹配时，只能放到[]的最左边或最右边                                       ['a+c', 'a*c', 'a-c']
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print(re.findall('a[a-zA-Z]c','a1c a+c a2c a9c a*c a11c a-c acc aAc'))  #['acc', 'aAc']
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print(re.findall('a[^a-zA-Z]c','a c a1c a+c a2c a9c a*c a11c a-c acc aAc'))# []内的^代表取反的意思
                                            #['a c', 'a1c', 'a+c', 'a2c', 'a9c', 'a*c', 'a-c']
print(re.findall('([a-z]+)_sb','egon alex_sb123123wxxxxxxxxxxxxx_sb,lxx_sb'))#['alex', 'wxxxxxxxxxxxxx', 'lxx']    
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print(re.findall('compan(ies|y)','Too many companies have gone bankrupt, and the next one is my company'))                                                      #| :或者 ['ies', 'y']
print(re.findall('compan(?:ies|y)','Too many companies have gone bankrupt, and the next one is my company'))    #(?:):代表取匹配成功的所有内容，而不仅仅只是括号内的内容 ['companies', 'company']

print(re.findall('alex|sb','123123 alex sb sadfsadfasdfegon alex sb egon'))#['alex', 'sb', 'alex', 'sb']
print(re.search('alex|sb','123213 alex sb sadfsadfasdfegon alex sb egon').group())#只到找到第一个匹配,然后返回一个包含匹配信息的对象   #alex
print(re.search('^alex','123213 alex sb sadfsadfasdfegon alex sb egon'))# None 匹配不成功返回None而不是[]
print(re.search('^alex','alex sb sadfsadfasdfegon alex sb egon').group())       #alex
print(re.match('alex','alex sb sadfsadfasdfegon alex sb egon').group())         #alex
print(re.match('alex','123213 alex sb sadfsadfasdfegon alex sb egon'))          #None
#search+^可以代替match
info='a:b:c:d'
print(info.split(':'))          #['a', 'b', 'c', 'd']
print(re.split(':',info))       #['a', 'b', 'c', 'd']
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info=r'get :a.txt\3333/rwx'
print(re.split('[ :\\\/]',info))    #['get', '', 'a.txt', '3333', 'rwx']
print('egon is beutifull egon'.replace('egon','EGON',1))    #EGON is beutifull egon
                                                        #123 egon is beutifull EGON 123
print(re.sub('(.*?)(egon)(.*?)(egon)(.*?)',r'\1\2\3EGON\5','123 egon is beutifull egon 123'))
            #(123)(egon)( is beutifull )(egon)(123)
print(re.sub('(lqz)(.*?)(SB)',r'\3\2\1',r'lqz is SB'))# SB is lqz
            #(lqz)(is)(SB)                      
print(re.sub('([a-zA-Z]+)([^a-zA-Z]+)([a-zA-Z]+)([^a-zA-Z]+)([a-zA-Z]+)',r'\5\2\3\4\1',r'lqzzzz123+ is SB'))                #SB123+ is lqzzzz                          #(lqzzzz)(123+ )(is)( )(SB)
pattern=re.compile('alex')
print(pattern.findall('alex is alex alex'))                         #['alex', 'alex', 'alex']
print(pattern.findall('alexasdfsadfsadfasdfasdfasfd is alex alex'))   #['alex', 'alex', 'alex']

import hashlib
m=hashlib.md5()
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m.update('hello'.encode('utf-8'))
m.update('world'.encode('utf-8'))
m.update('egon'.encode('utf-8'))
print(m.hexdigest()) #3801fab9b8c8d9fcb481017969843ed5
import hashlib
m=hashlib.md5()
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m.update('h'.encode('utf-8'))
m.update('e'.encode('utf-8'))
m.update('lloworld'.encode('utf-8'))
m.update('egon'.encode('utf-8'))
print(m.hexdigest()) #3801fab9b8c8d9fcb481017969843ed5

import hashlib
m=hashlib.md5()
with open(r'C:\Users\Desktop\上节课复习','rb') as f:
    for line in f:
        m.update(line)
    hv=m.hexdigest()
print(hv) #98416536bdf1f0dc0776629f501ae469

import hashlib
m=hashlib.md5()
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pwd='alex3714'
m.update('天王盖地虎'.encode('utf-8'))
m.update(pwd.encode('utf-8'))
m.update('小鸡炖蘑菇'.encode('utf-8'))
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print(m.hexdigest())    #ab44c43ea02e8c1083346ca707a6f572

import hashlib
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m=hashlib.md5()
m.update('helloworld'.encode('utf-8'))
print(m.hexdigest()) #fc5e038d38a57032085441e7fe7010b0
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m=hashlib.sha256()
m.update('helloworld'.encode('utf-8'))
print(m.hexdigest()) #936a185caaa266bb9cbe981e9e05cb78cd732b0b3280eb944412bb6f8f8f07af
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m=hashlib.sha512()
m.update('helloworld'.encode('utf-8'))
print(m.hexdigest()) #1594244d52f2d8c12b142bb61f47bc2eaf503d6d9ca8480cae9fcf112f66e4967dc5e8fa98285e36db8af1b8ffa8b84cb15e0fbcf836c3deb803c13f37659a60

import hmac
m=hmac.new('天王盖地虎，小鸡炖模块'.encode('utf-8'))
m.update('alex3814'.encode('utf-8'))
print(m.hexdigest())