Merge elements in list based on given indices

Question

I want to merge element in the list based on given start and stop index of tuple (non-overlap for tuple). I\'ll leave the indices that don\'t mention as it is. This is my ex

Answer 1

A quick-and-dirty solution would be:

ls = ['1', '2', '3', '4', '5', '6', '7']
merge = [(1, 3), (5, 7)]

result = []
index = 0

for start, end in merge:
    result += ls[index:start]
    result.append("".join(ls[start:end]))
    index = end

print result # ['1', '23', '4', '5', '67']