svn+ssh://pythondev@svn.python.org/python/trunk
........
r82221 | mark.dickinson | 2010-06-25 21:19:48 +0100 (Fri, 25 Jun 2010) | 1 line
Fix indentation of Python code example in C comment.
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def msum(iterable):
partials = [] # sorted, non-overlapping partial sums
for x in iterable:
- i = 0
- for y in partials:
- if abs(x) < abs(y):
- x, y = y, x
- hi = x + y
- lo = y - (hi - x)
- if lo:
- partials[i] = lo
- i += 1
- x = hi
- partials[i:] = [x]
+ i = 0
+ for y in partials:
+ if abs(x) < abs(y):
+ x, y = y, x
+ hi = x + y
+ lo = y - (hi - x)
+ if lo:
+ partials[i] = lo
+ i += 1
+ x = hi
+ partials[i:] = [x]
return sum_exact(partials)
Rounded x+y stored in hi with the roundoff stored in lo. Together hi+lo