Python List Conversion to string and split

Any Idea when I do the split on list( after converting to string) I am not getting the first and the last elements in the list….

if __name__ =="__main__":
    lst1= ['3 6 2 5'];
    lst1=str(lst1);
    a = [int(i) for i in lst1.split(' ') if i.isdigit()]
    print(a);

Outputs

[6, 2]

What I am looking for is

[2,3,5,6]

I think its due to the split characters which it finds after the 3(first element), but not sure how to resolve it.

>Solution :

Try it.

lst1= ['3 6 2 5'];
a = [int(i) for i in lst1[0].split(' ') if i.isdigit()]
a.sort()
print(a)