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* Fixed an unmatched parenthesis early in the text.

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* Clarified the meaning of lexicographic sequence ordering as discussed on
  comp.lang.python:  http://groups.google.com/groups?th=e163c9f9ba114493
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Raymond Hettinger 2003-06-26 17:41:40 +00:00
parent 546e34b654
commit daa340418b
1 changed files with 10 additions and 2 deletions
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Doc/ref/ref5.tex
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@ -714,7 +714,7 @@ following identity: \code{x == (x/y)*y + (x\%y)}. Integer division and
modulo are also connected with the built-in function \function{divmod()}: modulo are also connected with the built-in function \function{divmod()}:
\code{divmod(x, y) == (x/y, x\%y)}. These identities don't hold for \code{divmod(x, y) == (x/y, x\%y)}. These identities don't hold for
floating point numbers; there similar identities hold floating point numbers; there similar identities hold
approximately where \code{x/y} is replaced by \code{floor(x/y)}) or approximately where \code{x/y} is replaced by \code{floor(x/y)} or
\code{floor(x/y) - 1}\footnote{ \code{floor(x/y) - 1}\footnote{
If x is very close to an exact integer multiple of y, it's If x is very close to an exact integer multiple of y, it's
possible for \code{floor(x/y)} to be one larger than possible for \code{floor(x/y)} to be one larger than
@ -867,7 +867,15 @@ behavior.
\item \item
Tuples and lists are compared lexicographically using comparison of Tuples and lists are compared lexicographically using comparison of
corresponding items. corresponding elements. This means that to compare equal, each
element must compare equal and the two sequences must be of the same
type and have the same length.
If not equal, the sequences are ordered the same as their first
differing elements. For example, \code{cmp([1,2,x], [1,2,y])} returns
the same as \code{cmp(x,y)}. If the corresponding element does not
exist, the shorter sequence is ordered first (for example,
\code{[1,2] < [1,2,3]}).
\item \item
Mappings (dictionaries) compare equal if and only if their sorted Mappings (dictionaries) compare equal if and only if their sorted