def get_dev_info(str, start, end):

things = list()

while True:

start_pos = str.find(start)

if start_pos == -1:

break

end_pos = str.find(end)

if end_pos == -1:

break

while True:

startAnotherPos = str.find(start, start_pos + 1)

if startAnotherPos == -1:

break

if startAnotherPos < end_pos:

start_pos = startAnotherPos

if start_pos > end_pos:

end_another_pos = str.find(end, end_pos + 1)

end_pos = end_another_pos

else:

break

sub_str = str[start_pos:end_pos] + end

things.append(sub_str)

str = str[end_pos + len(end):]

things_final = list()

for thing in things:

if thing.startswith(start):

str_del_start = thing.replace(start,'')

things_final.append(str_del_start.replace(end,''))

return things_final