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# tag: array
import array # Python builtin module
from cpython cimport array # array.pxd / arrayarray.h
a = array.array('f', [1.0, 2.0, 3.0])
def test_len(a):
"""
>>> a = array.array('f', [1.0, 2.0, 3.0])
>>> len(a)
3
>>> int(test_len(a))
3
>>> assert len(a) == test_len(a)
"""
cdef array.array ca = a # for C-fast array usage
return len(ca)
def test_copy(a):
"""
>>> a = array.array('f', [1.0, 2.0, 3.0])
>>> test_copy(a)
array('f', [1.0, 2.0, 3.0])
"""
cdef array.array ca = a
cdef array.array b
b = array.copy(ca)
assert a == b
a[2] = 3.5
assert b[2] != a[2]
return b
def test_fast_access(a):
"""
>>> a = array.array('f', [1.0, 2.0, 3.0])
>>> test_fast_access(a)
"""
cdef array.array ca = a
cdef float value
with nogil:
value = ca.data.as_floats[1]
assert value == 2.0, value
#assert ca._c[:5] == b'\x00\x00\x80?\x00', repr(ca._c[:5])
with nogil:
ca.data.as_floats[1] += 2.0
assert ca.data.as_floats[1] == 4.0
def test_fast_buffer_access(a):
"""
>>> a = array.array('f', [1.0, 2.0, 3.0])
>>> test_fast_buffer_access(a)
"""
cdef array.array[float] ca = a
cdef float value
with nogil:
value = ca[1]
assert value == 2.0, value
with nogil:
ca[1] += 2.0
assert ca[1] == 4.0
def test_new_zero(a):
"""
>>> a = array.array('f', [1.0, 2.0, 3.0])
>>> test_new_zero(a)
array('f', [0.0, 0.0, 0.0])
"""
cdef array.array cb = array.clone(a, len(a), True)
assert len(cb) == len(a)
return cb
def test_set_zero(a):
"""
>>> a = array.array('f', [1.0, 2.0, 3.0])
>>> test_set_zero(a)
array('f', [0.0, 0.0, 0.0])
"""
cdef array.array cb = array.copy(a)
array.zero(cb)
assert a[1] != 0.0, a
assert cb[1] == 0.0, cb
return cb
def test_resize(a):
"""
>>> a = array.array('f', [1.0, 2.0, 3.0])
>>> test_resize(a)
"""
cdef array.array cb = array.copy(a)
array.resize(cb, 10)
for i in range(10):
cb.data.as_floats[i] = i
assert len(cb) == 10
assert cb[9] == cb[-1] == cb.data.as_floats[9] == 9
def test_resize_smart(a):
"""
>>> a = array.array('d', [1, 2, 3])
>>> test_resize_smart(a)
2
"""
cdef array.array cb = array.copy(a)
array.resize_smart(cb, 2)
return len(cb)
def test_buffer():
"""
>>> test_buffer()
"""
cdef object a = array.array('i', [1, 2, 3])
cdef object[int] ca = a
assert ca[0] == 1
assert ca[2] == 3
def test_buffer_typed():
"""
>>> test_buffer_typed()
"""
cdef array.array a = array.array('i', [1, 2, 3])
cdef object[int] ca = a
assert ca[0] == 1
assert ca[2] == 3
def test_view():
"""
>>> test_view()
"""
cdef object a = array.array('i', [1, 2, 3])
cdef int[:] ca = a
assert ca[0] == 1
assert ca[2] == 3
def test_view_typed():
"""
>>> test_view_typed()
"""
cdef array.array a = array.array('i', [1, 2, 3])
cdef int[:] ca = a
assert ca[0] == 1
assert ca[2] == 3
def test_extend():
"""
>>> test_extend()
"""
cdef array.array ca = array.array('i', [1, 2, 3])
cdef array.array cb = array.array('i', [4, 5])
cdef array.array cf = array.array('f', [1.0, 2.0, 3.0])
array.extend(ca, cb)
assert list(ca) == [1, 2, 3, 4, 5], list(ca)
try:
array.extend(ca, cf)
except TypeError:
pass
else:
assert False, 'extending incompatible array types did not raise'
def test_likes(a):
"""
>>> a = array.array('f', [1.0, 2.0, 3.0])
>>> test_likes(a)
array('f', [0.0, 0.0, 0.0])
"""
cdef array.array z = array.clone(a, len(a), True)
cdef array.array e = array.clone(a, len(a), False)
assert len(e) == len(a)
return z
def test_extend_buffer():
"""
>>> test_extend_buffer()
array('l', [15, 37, 389, 5077])
"""
cdef array.array ca = array.array('l', [15, 37])
cdef long[2] s
s[0] = 389
s[1] = 5077
array.extend_buffer(ca, <char*> &s, 2)
assert ca.data.as_ulongs[3] == 5077
assert len(ca) == 4
return ca
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