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Merged revisions 82221 via svnmerge from 

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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This commit is contained in:
Mark Dickinson 2010-06-25 20:22:24 +00:00
parent 88968ad380
commit fdb0accc31
1 changed files with 11 additions and 11 deletions
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22
Modules/mathmodule.c
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@ -989,17 +989,17 @@ _fsum_realloc(double **p_ptr, Py_ssize_t n,
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