diff options
Diffstat (limited to 'Doc/tut')
| -rw-r--r-- | Doc/tut/glossary.tex | 29 |
1 files changed, 13 insertions, 16 deletions
diff --git a/Doc/tut/glossary.tex b/Doc/tut/glossary.tex index 77374e8..c8082d5 100644 --- a/Doc/tut/glossary.tex +++ b/Doc/tut/glossary.tex @@ -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__} |