Python split a list into subsets based on pattern

Question

I\'m doing this but it feels this can be achieved with much less code. It is Python after all. Starting with a list, I split that list into subsets based on a string prefix.

Answer 1

In [28]: mylist = ['sub_0_a', 'sub_0_b', 'sub_1_a', 'sub_1_b']

In [29]: lis=[]

In [30]: for x in mylist:
    i=x.split("_")[1]
    try:
        lis[int(i)].append(x)
    except:    
        lis.append([])
        lis[-1].append(x)
   ....:         

In [31]: lis
Out[31]: [['sub_0_a', 'sub_0_b'], ['sub_1_a', 'sub_1_b']]