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# mode: run
# tag: list, slice, slicing
def test_full(seq):
"""
>>> l = [1,2,3,4]
>>> test_full(l)
[1, 2, 3, 4]
>>> l == test_full(l)
True
>>> l is test_full(l)
False
>>> try: test_full(42)
... except TypeError: pass
"""
obj = seq[:]
return obj
def test_start(seq, start):
"""
>>> l = [1,2,3,4]
>>> test_start(l, 2)
[3, 4]
>>> test_start(l, 3)
[4]
>>> test_start(l, 4)
[]
>>> test_start(l, 8)
[]
>>> test_start(l, -3)
[2, 3, 4]
>>> test_start(l, -4)
[1, 2, 3, 4]
>>> test_start(l, -8)
[1, 2, 3, 4]
>>> test_start(l, 0)
[1, 2, 3, 4]
>>> test_start(l, None)
[1, 2, 3, 4]
>>> try: test_start(42, 2, 3)
... except TypeError: pass
"""
obj = seq[start:]
return obj
def test_stop(seq, stop):
"""
>>> l = [1,2,3,4]
>>> test_stop(l, 3)
[1, 2, 3]
>>> test_stop(l, -1)
[1, 2, 3]
>>> test_stop(l, -3)
[1]
>>> test_stop(l, -4)
[]
>>> test_stop(l, -8)
[]
>>> test_stop(l, 0)
[]
>>> test_stop(l, None)
[1, 2, 3, 4]
>>> try: test_stop(42, 3)
... except TypeError: pass
"""
obj = seq[:stop]
return obj
def test_step(seq, step):
"""
>>> l = [1,2,3,4]
>>> test_step(l, -1)
[4, 3, 2, 1]
>>> test_step(l, 1)
[1, 2, 3, 4]
>>> test_step(l, 2)
[1, 3]
>>> test_step(l, 3)
[1, 4]
>>> test_step(l, -3)
[4, 1]
>>> test_step(l, None)
[1, 2, 3, 4]
>>> try: test_step(l, 0)
... except ValueError: pass
...
>>> try: test_step(42, 0)
... except TypeError: pass
...
"""
obj = seq[::step]
return obj
def test_start_and_stop(seq, start, stop):
"""
>>> l = [1,2,3,4]
>>> test_start_and_stop(l, 2, 3)
[3]
>>> test_start_and_stop(l, -3, -1)
[2, 3]
>>> test_start_and_stop(l, None, None)
[1, 2, 3, 4]
>>> try: test_start_and_stop(42, 2, 3)
... except TypeError: pass
"""
obj = seq[start:stop]
return obj
def test_start_stop_and_step(seq, start, stop, step):
"""
>>> l = [1,2,3,4,5]
>>> test_start_stop_and_step(l, 0, 5, 1)
[1, 2, 3, 4, 5]
>>> test_start_stop_and_step(l, 5, -1, -1)
[]
>>> test_start_stop_and_step(l, 5, None, -1)
[5, 4, 3, 2, 1]
>>> test_start_stop_and_step(l, 2, 5, 2)
[3, 5]
>>> test_start_stop_and_step(l, -100, 100, 1)
[1, 2, 3, 4, 5]
>>> test_start_stop_and_step(l, None, None, None)
[1, 2, 3, 4, 5]
>>> try: test_start_stop_and_step(l, None, None, 0)
... except ValueError: pass
...
>>> try: test_start_stop_and_step(42, 1, 2, 3)
... except TypeError: pass
"""
obj = seq[start:stop:step]
return obj
class A(object):
pass
def slice_of_temporary_smoketest():
"""
>>> slice_of_temporary_smoketest()
[3, 2]
"""
x = A()
x.a = [1, 2]
x.a[:] = [3,2]
return x.a
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