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Diffstat (limited to 'Doc/lib/libfuncs.tex')
| -rw-r--r-- | Doc/lib/libfuncs.tex | 34 |
1 files changed, 8 insertions, 26 deletions
diff --git a/Doc/lib/libfuncs.tex b/Doc/lib/libfuncs.tex index 0900317..c02f6f1 100644 --- a/Doc/lib/libfuncs.tex +++ b/Doc/lib/libfuncs.tex @@ -868,7 +868,7 @@ class Parrot(object): \end{funcdesc} \begin{funcdesc}{range}{\optional{start,} stop\optional{, step}} - This is a versatile function to create lists containing arithmetic + This is a versatile function to create sequences containing arithmetic progressions. It is most often used in \keyword{for} loops. The arguments must be plain integers. If the \var{step} argument is omitted, it defaults to \code{1}. If the \var{start} argument is @@ -882,19 +882,19 @@ class Parrot(object): \exception{ValueError} is raised). Example: \begin{verbatim} ->>> range(10) +>>> list(range(10)) [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] ->>> range(1, 11) +>>> list(range(1, 11)) [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] ->>> range(0, 30, 5) +>>> list(range(0, 30, 5)) [0, 5, 10, 15, 20, 25] ->>> range(0, 10, 3) +>>> list(range(0, 10, 3)) [0, 3, 6, 9] ->>> range(0, -10, -1) +>>> list(range(0, -10, -1)) [0, -1, -2, -3, -4, -5, -6, -7, -8, -9] ->>> range(0) +>>> list(range(0)) [] ->>> range(1, 0) +>>> list(range(1, 0)) [] \end{verbatim} \end{funcdesc} @@ -1230,24 +1230,6 @@ class C(B): other scopes (such as modules) can be. This may change.} \end{funcdesc} -\begin{funcdesc}{xrange}{\optional{start,} stop\optional{, step}} - This function is very similar to \function{range()}, but returns an - ``xrange object'' instead of a list. This is an opaque sequence - type which yields the same values as the corresponding list, without - actually storing them all simultaneously. The advantage of - \function{xrange()} over \function{range()} is minimal (since - \function{xrange()} still has to create the values when asked for - them) except when a very large range is used on a memory-starved - machine or when all of the range's elements are never used (such as - when the loop is usually terminated with \keyword{break}). - - \note{\function{xrange()} is intended to be simple and fast. - Implementations may impose restrictions to achieve this. - The C implementation of Python restricts all arguments to - native C longs ("short" Python integers), and also requires - that the number of elements fit in a native C long.} -\end{funcdesc} - \begin{funcdesc}{zip}{\optional{iterable, \moreargs}} This function returns a list of tuples, where the \var{i}-th tuple contains the \var{i}-th element from each of the argument sequences or iterables. |