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Add examples for inspect.

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Raymond Hettinger 2011-01-19 04:14:34 +00:00
parent a9013f9bd8
commit 4bea978f65
1 changed files with 33 additions and 6 deletions
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39
Doc/whatsnew/3.2.rst
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@ -742,7 +742,7 @@ functools
(Contributed by Raymond Hettinger.) (Contributed by Raymond Hettinger.)
* To aid in porting programs from Python 2, the :func:`~functools.cmp_to_key` * To aid in porting programs from Python 2, the :func:`functools.cmp_to_key`
function converts an old-style comparison function to function converts an old-style comparison function to
modern :term:`key function`: modern :term:`key function`:
@ -758,7 +758,7 @@ itertools
--------- ---------
* The :mod:`itertools` module has a new :func:`~itertools.accumulate` function * The :mod:`itertools` module has a new :func:`~itertools.accumulate` function
modeled on APL's *scan* operator and on Numpy's *accumulate* function: modeled on APL's *scan* operator and Numpy's *accumulate* function:
>>> list(accumulate(8, 2, 50)) >>> list(accumulate(8, 2, 50))
[8, 10, 60] [8, 10, 60]
@ -1372,14 +1372,41 @@ inspect
* The :mod:`inspect` module has a new function * The :mod:`inspect` module has a new function
:func:`~inspect.getgeneratorstate` to easily identify the current state of a :func:`~inspect.getgeneratorstate` to easily identify the current state of a
generator as one of ``GEN_CREATED``, ``GEN_RUNNING``, ``GEN_SUSPENDED`` or generator as one of *GEN_CREATED*, *GEN_RUNNING*, *GEN_SUSPENDED* or
``GEN_CLOSED``. (Contributed by Rodolpho Eckhardt and Nick Coghlan, *GEN_CLOSED*::
:issue:`10220`.)
>>> def gen():
yield 'one'
yield 'two'
>>> g = gen()
>>> inspect.getgeneratorstate(g)
'GEN_CREATED'
>>> next(g)
'one'
>>> inspect.getgeneratorstate(g)
'GEN_SUSPENDED'
(Contributed by Rodolpho Eckhardt and Nick Coghlan, :issue:`10220`.)
* To support lookups without the possibility of activating a dynamic attribute, * To support lookups without the possibility of activating a dynamic attribute,
the :mod:`inspect` module has a new function, :func:`~inspect.getattr_static`. the :mod:`inspect` module has a new function, :func:`~inspect.getattr_static`.
Unlike :func:`hasattr`, this is a true read-only search, guaranteed not to Unlike :func:`hasattr`, this is a true read-only search, guaranteed not to
change state while it is searching. (Contributed by Michael Foord.) change state while it is searching::
>>> class A:
@property
def f(self):
print('Running')
return 10
>>> a = A()
>>> getattr(a, 'f')
Running
10
>>> inspect.getattr_static(a, 'f')
<property object at 0x1022bd788>
(Contributed by Michael Foord.)
pydoc pydoc
----- -----