

In [1]:

    
import re



In [2]:

    
text = 'Learning Python 101: 2016-07-14'



In [3]:

    
p = re.compile('\d')



In [4]:

    
s = p.search(text)



In [5]:

    
if s is not None:
    print(s.group(0))



In [6]:

    
s = re.search('\d', text)



In [7]:

    
if s is not None:
    print(s.group(0))

timeit 매직 커맨드를 이용한 속도 비교



In [8]:

    
%timeit -n 100 p.search(text)









    



100 loops, best of 3: 540 ns per loop



In [9]:

    
%timeit -n 100 re.search('\d', text)









    



100 loops, best of 3: 1.03 µs per loop



In [10]:

    
m = re.match('\d', text)



In [11]:

    
m is None









    Out[11]:





True



In [12]:

    
m = re.match('.*\d', text)



In [13]:

    
if m is not None:
    print(m.group())









    



Learning Python 101: 2016-07-14



In [14]:

    
m = re.match('.*?\d', text)



In [15]:

    
if m is not None:
    print(m.group())









    



Learning Python 1

매칭 문자열 그룹핑



In [16]:

    
m = re.match('.*?(\d)', text)



In [17]:

    
if m is not None:
    print([m.group(0), m.group(1)])









    



['Learning Python 1', '1']



In [18]:

    
m = re.match('.*?(\d+)', text)



In [19]:

    
if m is not None:
    print([m.group(0), m.group(1)])









    



['Learning Python 101', '101']



In [20]:

    
m = re.match('(.*?)(\d+)', text)



In [21]:

    
if m is not None:
    print([m.group(0), m.group(1), m.group(2)])









    



['Learning Python 101', 'Learning Python ', '101']



In [22]:

    
m = re.match('(.*?)(\d+)$', text)



In [23]:

    
if m is not None:
    print([m.group(0), m.group(1), m.group(2)])









    



['Learning Python 101: 2016-07-14', 'Learning Python 101: 2016-07-', '14']



In [24]:

    
m = re.match('(.*?)([0-9\-]+)$', text)



In [25]:

    
if m is not None:
    print([m.group(0), m.group(1), m.group(2)])









    



['Learning Python 101: 2016-07-14', 'Learning Python 101: ', '2016-07-14']

findall 메소드



In [26]:

    
re.findall('\d', text)









    Out[26]:





['1', '0', '1', '2', '0', '1', '6', '0', '7', '1', '4']



In [27]:

    
re.findall('\d+', text)









    Out[27]:





['101', '2016', '07', '14']

매칭된 문자열 참조



In [28]:

    
re.sub('(\d+)-(\d+)-(\d+)', '\\2-\\3-\\1', text)









    Out[28]:





'Learning Python 101: 07-14-2016'



In [ ]: