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SF bug #940579: section 5.10: 'not' returns boolean, not int

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Raymond Hettinger 2004-04-23 17:11:47 +00:00
parent 602472215b
commit 46a16f297f
1 changed files with 4 additions and 4 deletions
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Doc/ref/ref5.tex
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@ -977,8 +977,8 @@ as false: \code{None}, numeric zero of all types, empty sequences
(strings, tuples and lists), and empty mappings (dictionaries). All
other values are interpreted as true.
The operator \keyword{not} yields \code{1} if its argument is false,
\code{0} otherwise.
The operator \keyword{not} yields \code{True} if its argument is false,
\code{False} otherwise.
\opindex{not}
The expression \code{\var{x} and \var{y}} first evaluates \var{x}; if
@ -992,13 +992,13 @@ evaluated and the resulting value is returned.
\opindex{or}
(Note that neither \keyword{and} nor \keyword{or} restrict the value
and type they return to \code{0} and \code{1}, but rather return the
and type they return to \code{False} and \code{True}, but rather return the
last evaluated argument.
This is sometimes useful, e.g., if \code{s} is a string that should be
replaced by a default value if it is empty, the expression
\code{s or 'foo'} yields the desired value. Because \keyword{not} has to
invent a value anyway, it does not bother to return a value of the
same type as its argument, so e.g., \code{not 'foo'} yields \code{0},
same type as its argument, so e.g., \code{not 'foo'} yields \code{False},
not \code{''}.)
\section{Lambdas\label{lambdas}}