Merge doctest fixes in functional howto with 3.2.
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@ -198,7 +198,7 @@ You can experiment with the iteration interface manually:
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>>> L = [1,2,3]
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>>> it = iter(L)
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>>> it
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>>> it #doctest: +ELLIPSIS
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<...iterator object at ...>
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>>> it.__next__() # same as next(it)
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1
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@ -267,15 +267,11 @@ sequence type, such as strings, will automatically support creation of an
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iterator.
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Calling :func:`iter` on a dictionary returns an iterator that will loop over the
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dictionary's keys:
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.. not a doctest since dict ordering varies across Pythons
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::
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dictionary's keys::
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>>> m = {'Jan': 1, 'Feb': 2, 'Mar': 3, 'Apr': 4, 'May': 5, 'Jun': 6,
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... 'Jul': 7, 'Aug': 8, 'Sep': 9, 'Oct': 10, 'Nov': 11, 'Dec': 12}
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>>> for key in m:
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>>> for key in m: #doctest: +SKIP
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... print(key, m[key])
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Mar 3
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Feb 2
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@ -303,7 +299,7 @@ The :func:`dict` constructor can accept an iterator that returns a finite stream
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of ``(key, value)`` tuples:
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>>> L = [('Italy', 'Rome'), ('France', 'Paris'), ('US', 'Washington DC')]
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>>> dict(iter(L))
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>>> dict(iter(L)) #doctest: +SKIP
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{'Italy': 'Rome', 'US': 'Washington DC', 'France': 'Paris'}
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Files also support iteration by calling the :meth:`~io.TextIOBase.readline`
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@ -411,12 +407,9 @@ clauses, the length of the resulting output will be equal to the product of the
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lengths of all the sequences. If you have two lists of length 3, the output
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list is 9 elements long:
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.. doctest::
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:options: +NORMALIZE_WHITESPACE
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>>> seq1 = 'abc'
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>>> seq2 = (1,2,3)
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>>> [(x, y) for x in seq1 for y in seq2]
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>>> [(x, y) for x in seq1 for y in seq2] #doctest: +NORMALIZE_WHITESPACE
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[('a', 1), ('a', 2), ('a', 3),
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('b', 1), ('b', 2), ('b', 3),
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('c', 1), ('c', 2), ('c', 3)]
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@ -449,11 +442,9 @@ is what generators provide; they can be thought of as resumable functions.
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Here's the simplest example of a generator function:
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.. testcode::
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def generate_ints(N):
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for i in range(N):
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yield i
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>>> def generate_ints(N):
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... for i in range(N):
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... yield i
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Any function containing a :keyword:`yield` keyword is a generator function;
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this is detected by Python's :term:`bytecode` compiler which compiles the
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@ -471,7 +462,7 @@ executing.
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Here's a sample usage of the ``generate_ints()`` generator:
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>>> gen = generate_ints(3)
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>>> gen
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>>> gen #doctest: +ELLIPSIS
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<generator object generate_ints at ...>
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>>> next(gen)
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0
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@ -576,16 +567,16 @@ the internal counter.
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And here's an example of changing the counter:
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>>> it = counter(10)
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>>> next(it)
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>>> it = counter(10) #doctest: +SKIP
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>>> next(it) #doctest: +SKIP
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0
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>>> next(it)
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>>> next(it) #doctest: +SKIP
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1
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>>> it.send(8)
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>>> it.send(8) #doctest: +SKIP
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8
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>>> next(it)
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>>> next(it) #doctest: +SKIP
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9
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>>> next(it)
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>>> next(it) #doctest: +SKIP
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Traceback (most recent call last):
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File "t.py", line 15, in ?
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it.next()
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@ -688,11 +679,11 @@ constructed list's :meth:`~list.sort` method. ::
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>>> import random
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>>> # Generate 8 random numbers between [0, 10000)
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>>> rand_list = random.sample(range(10000), 8)
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>>> rand_list
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>>> rand_list #doctest: +SKIP
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[769, 7953, 9828, 6431, 8442, 9878, 6213, 2207]
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>>> sorted(rand_list)
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>>> sorted(rand_list) #doctest: +SKIP
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[769, 2207, 6213, 6431, 7953, 8442, 9828, 9878]
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>>> sorted(rand_list, reverse=True)
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>>> sorted(rand_list, reverse=True) #doctest: +SKIP
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[9878, 9828, 8442, 7953, 6431, 6213, 2207, 769]
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(For a more detailed discussion of sorting, see the :ref:`sortinghowto`.)
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