In [1]:

    

import re


    

In [2]:

    

s = 'aaa@xxx.com bbb@yyy.com ccc@zzz.com'


    

In [3]:

    

print(re.sub('[a-z]*@', 'ABC@', s))


    

    




ABC@xxx.com ABC@yyy.com ABC@zzz.com

In [4]:

    

print(re.sub('[a-z]*@', 'ABC@', s, 2))


    

    




ABC@xxx.com ABC@yyy.com ccc@zzz.com

In [5]:

    

print(re.sub('[xyz]', '1', s))


    

    




aaa@111.com bbb@111.com ccc@111.com

In [6]:

    

print(re.sub('aaa|bbb|ccc', 'ABC', s))


    

    




ABC@xxx.com ABC@yyy.com ABC@zzz.com

In [7]:

    

print(re.sub('([a-z]*)@', '\\1-123@', s))


    

    




aaa-123@xxx.com bbb-123@yyy.com ccc-123@zzz.com

In [8]:

    

print(re.sub('([a-z]*)@', r'\1-123@', s))


    

    




aaa-123@xxx.com bbb-123@yyy.com ccc-123@zzz.com

In [9]:

    

t = re.subn('[a-z]*@', 'ABC@', s)
print(t)


    

    




('ABC@xxx.com ABC@yyy.com ABC@zzz.com', 3)

In [10]:

    

print(type(t))


    

    




<class 'tuple'>

In [11]:

    

print(t[0])


    

    




ABC@xxx.com ABC@yyy.com ABC@zzz.com

In [12]:

    

print(t[1])


    

    




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