languages/cpython
languages/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython synced 2024-09-18 21:31:39 +00:00
Code Issues Packages Projects Releases Wiki Activity

SF bug #1168135: Python 2.5a0 Tutorial errors and observations

Browse source 
(Contributed by Michael R Bax.)
This commit is contained in:
Raymond Hettinger 2005-08-21 12:35:29 +00:00
parent 6cd5377c72
commit f755432f41
1 changed files with 13 additions and 16 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

29
Doc/tut/glossary.tex
View file

@ -24,9 +24,9 @@ Rossum}{http://www.python.org/\textasciitilde{}guido/}, Python's creator.
\index{byte code}
\item[byte code]
The internal representation of a Python program in the interpreter.
The byte code is also cached in the \code{.pyc} and \code{.pyo}
The byte code is also cached in \code{.pyc} and \code{.pyo}
files so that executing the same file is faster the second time
(compilation from source to byte code can be saved). This
(recompilation from source to byte code can be avoided). This
``intermediate language'' is said to run on a ``virtual
machine'' that calls the subroutines corresponding to each bytecode.
@ -37,7 +37,6 @@ Any class which does not inherit from \class{object}. See
\index{coercion}
\item[coercion]
The implicit conversion of an instance of one type to another during an
operation which involves two arguments of the same type. For example,
{}\code{int(3.15)} converts the floating point number to the integer
@ -53,7 +52,6 @@ same value by the programmer, e.g., {}\code{float(3)+4.5} rather than just
\index{complex number}
\item[complex number]
An extension of the familiar real number system in which all numbers are
expressed as a sum of a real part and an imaginary part. Imaginary numbers
are real multiples of the imaginary unit (the square root of {}\code{-1}),
@ -117,7 +115,7 @@ by executing:
from __future__ import division
\end{verbatim}
the expression \code{11/4} would evaluate to \code{2.75}. By actually
the expression \code{11/4} would evaluate to \code{2.75}. By
importing the \ulink{\module{__future__}}{../lib/module-future.html}
module and evaluating its variables, you can see when a new feature
was first added to the language and when it will become the default:
@ -249,6 +247,13 @@ pass it to the \function{iter()} function or use it in a
return the same exhausted iterator object used in the previous iteration
pass, making it appear like an empty container.
\index{LBYL}
\item[LBYL]
Look before you leap. This coding style explicitly tests for
pre-conditions before making calls or lookups. This style contrasts
with the \emph{EAFP} approach and is characterized by the presence of
many \keyword{if} statements.
\index{list comprehension}
\item[list comprehension]
A compact way to process all or a subset of elements in a sequence and
@ -258,14 +263,6 @@ containing hex numbers (0x..) that are even and in the range from 0 to 255.
The \keyword{if} clause is optional. If omitted, all elements in
{}\code{range(256)} are processed.
\index{LBYL}
\item[LBYL]
Look before you leap. This coding style explicitly tests for
pre-conditions before making calls or lookups. This style contrasts
with the \emph{EAFP} approach and is characterized by the presence of
many \keyword{if} statements.
\index{mapping}
\item[mapping]
A container object (such as \class{dict}) that supports arbitrary key
@ -293,11 +290,11 @@ See also \emph{immutable}.
\item[namespace]
The place where a variable is stored. Namespaces are implemented as
dictionaries. There are the local, global and builtin namespaces
as well asnested namespaces in objects (in methods). Namespaces support
as well as nested namespaces in objects (in methods). Namespaces support
modularity by preventing naming conflicts. For instance, the
functions \function{__builtin__.open()} and \function{os.open()} are
distinguished by their namespaces. Namespaces also aid readability
and maintainability by making it clear which modules implement a
and maintainability by making it clear which module implements a
function. For instance, writing \function{random.seed()} or
{}\function{itertools.izip()} makes it clear that those functions are
implemented by the \ulink{\module{random}}{../lib/module-random.html}
@ -324,7 +321,7 @@ classes can use Python's newer, versatile features like
\index{Python3000}
\item[Python3000]
A mythical python release, not required be backward compatible, with
A mythical python release, not required to be backward compatible, with
telepathic interface.
\index{__slots__}