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Glossary cleanup
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@ -143,10 +143,9 @@ Glossary
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For more information about descriptors' methods, see :ref:`descriptors`.
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dictionary
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An associative array, where arbitrary keys are mapped to values. The use
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of :class:`dict` closely resembles that for :class:`list`, but the keys can
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be any object with a :meth:`__hash__` function, not just integers.
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Called a hash in Perl.
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An associative array, where arbitrary keys are mapped to values. The keys
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can be any object with :meth:`__hash__` function and :meth:`__eq__`
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methods. Called a hash in Perl.
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docstring
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A string literal which appears as the first expression in a class,
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@ -193,13 +192,20 @@ Glossary
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implement a method named :meth:`find_module`. See :pep:`302` for
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details.
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floor division
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Mathematical division that rounds down to nearest integer. The floor
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division operator is ``//``. For example, the expression ``11 // 4``
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evaluates to ``2`` in contrast to the ``2.75`` returned by float true
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division. Note that ``(-11) // 4`` is ``-3`` because that is ``-2.75``
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rounded *downward*. See :pep:`238`.
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function
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A series of statements which returns some value to a caller. It can also
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be passed zero or more arguments which may be used in the execution of
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the body. See also :term:`argument` and :term:`method`.
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__future__
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A pseudo module which programmers can use to enable new language features
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A pseudo-module which programmers can use to enable new language features
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which are not compatible with the current interpreter. For example, the
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expression ``11/4`` currently evaluates to ``2``. If the module in which
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it is executed had enabled *true division* by executing::
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@ -224,13 +230,13 @@ Glossary
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generator
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A function which returns an iterator. It looks like a normal function
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except that values are returned to the caller using a :keyword:`yield`
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statement instead of a :keyword:`return` statement. Generator functions
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often contain one or more :keyword:`for` or :keyword:`while` loops which
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:keyword:`yield` elements back to the caller. The function execution is
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stopped at the :keyword:`yield` keyword (returning the result) and is
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resumed there when the next element is requested by calling the
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:meth:`next` method of the returned iterator.
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except that it contains :keyword:`yield` statements for producing a series
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a values usable in a for-loop or that can be retrieved one at a time with
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the :func:`next` function. Each :keyword:`yield` temporarily suspends
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processing, remembering the location execution state (including local
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variables and pending try-statements). When the generator resumes, it
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picks-up where it left-off (in contrast to functions which start fresh on
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every invocation).
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.. index:: single: generator expression
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@ -275,9 +281,7 @@ Glossary
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IDLE
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An Integrated Development Environment for Python. IDLE is a basic editor
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and interpreter environment which ships with the standard distribution of
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Python. Good for beginners, it also serves as clear example code for
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those wanting to implement a moderately sophisticated, multi-platform GUI
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application.
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Python.
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immutable
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An object with a fixed value. Immutable objects include numbers, strings and
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@ -389,7 +393,8 @@ Glossary
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mapping
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A container object (such as :class:`dict`) which supports arbitrary key
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lookups using the special method :meth:`__getitem__`.
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lookups using the special method :meth:`__getitem__`. Mappings also
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support :meth:`__len__`, :meth:`__iter__`, and :meth:`__contains__`.
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metaclass
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The class of a class. Class definitions create a class name, a class
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