Original Translation
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An object that tries to find the :term:`loader` for a module. It must implement a method named :meth:`find_module`. See :pep:`302` for details and :class:`importlib.abc.Finder` for an :term:`abstract base class`.
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Mathematical division discarding any remainder. The floor division operator is ``//``. For example, the expression ``11//4`` evaluates to ``2`` in contrast to the ``2.75`` returned by float true division.
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A series of statements which returns some value to a caller. It can also be passed zero or more arguments which may be used in the execution of the body. See also :term:`argument` and :term:`method`.
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A pseudo module which programmers can use to enable new language features which are not compatible with the current interpreter.
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By importing the :mod:`__future__` module and evaluating its variables, you can see when a new feature was first added to the language and when it becomes the default::
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>>> import __future__ >>> __future__.division _Feature((2, 2, 0, 'alpha', 2), (3, 0, 0, 'alpha', 0), 8192)
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The process of freeing memory when it is not used anymore. Python performs garbage collection via reference counting and a cyclic garbage collector that is able to detect and break reference cycles.
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A function which returns an iterator. It looks like a normal function except that values are returned to the caller using a :keyword:`yield` statement instead of a :keyword:`return` statement. Generator functions often contain one or more :keyword:`for` or :keyword:`while` loops which :keyword:`yield` elements back to the caller. The function execution is stopped at the :keyword:`yield` keyword (returning the result) and is resumed there when the next element is requested by calling the :meth:`__next__` method of the returned iterator.
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An expression that returns an iterator. It looks like a normal expression followed by a :keyword:`for` expression defining a loop variable, range, and an optional :keyword:`if` expression. The combined expression generates values for an enclosing function::
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>>> sum(i*i for i in range(10)) # sum of squares 0, 1, 4, ... 81 285