Some other function: The second one is short and faster than the first.
def computeLeadingWhitespaceWidth (s,tab_width):
w = 0
for ch in s:
if ch == ' ':
w += 1
elif ch == '\t':
w += (abs(tab_width) - (w % abs(tab_width)))
else:
break
return w
def computeLeadingWhitespaceWidth2(s, tab_width):
t = s.expandtabs(abs(tab_width))
return len(t) - len(t.lstrip())
I don't know - are such micro-optimizations welcome or just a distraction?
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