In [1]:

    

import re


    

In [2]:

    

s = '111aaa222bbb333'


    

In [3]:

    

result = re.split('[a-z]+', s)
print(result)


    

    




['111', '222', '333']

In [4]:

    

result = re.split('[0-9]+', s)
print(result)


    

    




['', 'aaa', 'bbb', '']

In [5]:

    

result = re.split('[a-z]+', s, 1)
print(result)


    

    




['111', '222bbb333']