diff options
| -rw-r--r-- | Doc/lib/libfuncs.tex | 11 |
1 files changed, 8 insertions, 3 deletions
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 @@ class C: 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 @@ class C: \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 @@ class C: 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} |