python正则表达式2

 1 >>> import re
 2 >>> pattern=r'\d{3,4}-?\d{8}'
 3 >>> re.findall( pattern, '021-12345678' )
 4 ['021-12345678']
 5 >>> re.findall( pattern, '02188888888' )
 6 ['02188888888']
 7 >>> re.findall( pattern, '0218888888' )
 8 []
 9 >>> re.findall( pattern, '021-8888888' )
10 []
11 >>> 

>>> patterTel=re.compile( pattern )
>>> patterTel
<_sre.SRE_Pattern object at 0x7fd19ba5ab90>
>>> patterTel.findall( '021-88888888' )
['021-88888888']
>>> 

 1 >>> pattern=r'[a-z]+'
 2 >>> re.findall( pattern, 'abc' )
 3 ['abc']
 4 >>> re.findall( pattern, 'aBc' )
 5 ['a', 'c']
 6 >>> re.compile( pattern, re.I )
 7 <_sre.SRE_Pattern object at 0x7fd19b906490>
 8 >>> cPattern = re.compile( pattern, re.I )
 9 >>> cPattern.findall( 'aBc' )
10 ['aBc']
11 >>> 

>>> pattern=r'abc'
>>> re.match( pattern, 'ghostwu abc' )
>>> re.match( pattern, 'abc ghostwu' )
<_sre.SRE_Match object at 0x7fd19b96c780>
>>> re.match( pattern, ' abc ghostwu' )
>>> res = re.match( pattern, 'abc ghostwu' )
>>> if res:
...     print '是以abc开头的'
... else:
...     print '不是以abc开头的'
... 
是以abc开头的
>>> 

>>> pattern=r'abc'
>>> re.search( pattern, 'abc ghostwu' )
<_sre.SRE_Match object at 0x7fd19b96c850>
>>> re.search( pattern, 'ghostwu abc' )
<_sre.SRE_Match object at 0x7fd19b96c780>
>>> re.search( pattern, 'ghostwu abc def' )
<_sre.SRE_Match object at 0x7fd19b96c850>
>>> re.search( pattern, 'ghostwu def' )
>>> 

>>> pattern=r'abc'
>>> iterator=re.finditer( pattern, 'abc def abc ghostwu abc' )
>>> iterator.next()
<_sre.SRE_Match object at 0x7fd19b96c780>
>>> iterator.next()
<_sre.SRE_Match object at 0x7fd19b96c850>
>>> iterator.next()
<_sre.SRE_Match object at 0x7fd19b96c780>
>>> iterator.next()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
StopIteration
>>> 

>>> pattern=r'abc'
>>> res=re.match( pattern, 'abc ghostwu abc' )
>>> res
<_sre.SRE_Match object at 0x7fd19b96c850>
>>> res.group()
'abc'

>>> pattern=r'abc'
>>> re.finditer( pattern, 'abc ghostwu abc abc hello' )
<callable-iterator object at 0x7fd19b982190>
>>> res = re.finditer( pattern, 'abc ghostwu abc abc hello' )
>>> res.next().group()
'abc'
>>> res.next().group()
'abc'
>>> res.next().group()
'abc'
>>> res.next().group()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
StopIteration
>>> 

>>> str='hello abc'
>>> str.replace( 'abc', 'ghostwu' )
'hello ghostwu'
>>> str
'hello abc'
>>> re.sub( r'abc', 'ghostwu', str )
'hello ghostwu'
>>> 

>>> str='ghostwu:hi,nice to meet you!'
>>> re.sub( r'[r-t]', 'R', str )
'ghoRRwu:hi,nice Ro meeR you!'
>>> 

>>> str=r'jfsdaft jdfasfcxvt jfdsafdast'
>>> pattern=r'j.*t?'
>>> re.sub( pattern, 'javascript', str )
'javascript'
>>> re.subn( pattern, 'javascript', str )
('javascript', 1)

>>> ip='127.0.0.1'
>>> ip.split( '.' )
['127', '0', '0', '1']
>>> pattern='\.'
>>> re.split( pattern, ip )
['127', '0', '0', '1']

>>> str="hello, my name is ghostwu"
>>> pattern=r'[\s,]'
>>> re.split( pattern, str )
['hello', '', 'my', 'name', 'is', 'ghostwu']
>>>