Hi AKazak,
I am not sure if I understand your question correctly.
Since get_labels() returns a list from entire row on worksheet, you can easily set up a subset on python side, like
wks=op.find_sheet()
ln = wks.get_labels('L') #Long Name row
#c1 refers to col(B), c2 refers to col(D)
c1=1
c2=3
sub_ln=ln[c1:c2+1]
Is it what you need?
or you may show a sample?