Patch #744877: Explain filter in terms of list comprehension. Remove
explanation of int in terms of string.atoi. Explain sum in terms of
reduce.
diff --git a/Doc/lib/libfuncs.tex b/Doc/lib/libfuncs.tex
index 4020e8b..2924f78 100644
--- a/Doc/lib/libfuncs.tex
+++ b/Doc/lib/libfuncs.tex
@@ -439,6 +439,11 @@
is always a list. If \var{function} is \code{None}, the identity
function is assumed, that is, all elements of \var{list} that are false
(zero or empty) are removed.
+
+ Note that \code{filter(function, list)} equals
+ \code{[item for item in list if function(item)]} if function is not
+ \code{None} and \code{[item for item in list if item]} if function is
+ None.
\end{funcdesc}
\begin{funcdesc}{float}{x}
@@ -537,9 +542,8 @@
\begin{funcdesc}{int}{x\optional{, radix}}
Convert a string or number to a plain integer. If the argument is a
string, it must contain a possibly signed decimal number
- representable as a Python integer, possibly embedded in whitespace;
- this behaves identical to \code{string.atoi(\var{x}\optional{,
- \var{radix}})}. The \var{radix} parameter gives the base for the
+ representable as a Python integer, possibly embedded in whitespace.
+ The \var{radix} parameter gives the base for the
conversion and may be any integer in the range [2, 36], or zero. If
\var{radix} is zero, the proper radix is guessed based on the
contents of string; the interpretation is the same as for integer
@@ -904,6 +908,7 @@
The \var{sequence}'s items are normally numbers, and are not allowed
to be strings. The fast, correct way to concatenate sequence of
strings is by calling \code{''.join(\var{sequence})}.
+ Note that \code{sum(range(n), m)} equals \code{reduce(operator.add, range(n), m)}
\versionadded{2.3}
\end{funcdesc}