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|
import sys
IS_PY3 = sys.version_info[0] >= 3
__doc__ = """
>>> it = iter([1,2,3])
>>> if not IS_PY3:
... next = type(it).next
>>> next(it)
1
>>> next(it)
2
>>> next(it)
3
>>> next(it)
Traceback (most recent call last):
StopIteration
>>> next(it)
Traceback (most recent call last):
StopIteration
>>> if IS_PY3: next(it, 123)
... else: print(123)
123
"""
if IS_PY3:
__doc__ += """
>>> next(123) # doctest: +ELLIPSIS
Traceback (most recent call last):
TypeError: ...int... object is not an iterator
"""
def test_next_not_iterable(it):
"""
>>> test_next_not_iterable(123)
Traceback (most recent call last):
TypeError: int object is not an iterator
"""
return next(it)
def test_single_next(it):
"""
>>> it = iter([1,2,3])
>>> test_single_next(it)
1
>>> test_single_next(it)
2
>>> test_single_next(it)
3
>>> test_single_next(it)
Traceback (most recent call last):
StopIteration
>>> test_single_next(it)
Traceback (most recent call last):
StopIteration
"""
return next(it)
def test_default_next(it, default):
"""
>>> it = iter([1,2,3])
>>> test_default_next(it, 99)
1
>>> test_default_next(it, 99)
2
>>> test_default_next(it, 99)
3
>>> test_default_next(it, 99)
99
>>> test_default_next(it, 99)
99
"""
return next(it, default)
def test_next_override(it):
"""
>>> it = iter([1,2,3])
>>> test_next_override(it)
1
>>> test_next_override(it)
1
>>> test_next_override(it)
1
>>> test_next_override(it)
1
"""
def next(it):
return 1
return next(it)
|
