Commit 604b3135 authored by nooper's avatar nooper

Cython array import naming conflict

It’s not clear to know which is used Cython array or Python array.
parent ea071f25
.. _array-array: .. _array-array:
============================ ==========================
Working with Python arrays Working with Python arrays
============================ ==========================
Python has a builtin array module supporting dynamic 1-dimensional arrays of Python has a builtin array module supporting dynamic 1-dimensional arrays of
primitive types. It is possible to access the underlying C array of a Python primitive types. It is possible to access the underlying C array of a Python
...@@ -20,9 +20,9 @@ Safe usage with memory views ...@@ -20,9 +20,9 @@ Safe usage with memory views
:: ::
from cpython cimport array from cpython cimport array as c_array
from array import array from array import array
cdef array.array a = array('i', [1, 2, 3]) cdef c_array.array a = array('i', [1, 2, 3])
cdef int[:] ca = a cdef int[:] ca = a
print ca[0] print ca[0]
...@@ -36,9 +36,9 @@ memory view, there will be a slight overhead to construct the memory ...@@ -36,9 +36,9 @@ memory view, there will be a slight overhead to construct the memory
view. However, from that point on the variable can be passed to other view. However, from that point on the variable can be passed to other
functions without overhead, so long as it is typed:: functions without overhead, so long as it is typed::
from cpython cimport array from cpython cimport array as c_array
from array import array from array import array
cdef array.array a = array('i', [1, 2, 3]) cdef c_array.array a = array('i', [1, 2, 3])
cdef int[:] ca = a cdef int[:] ca = a
cdef int overhead(object a): cdef int overhead(object a):
...@@ -60,10 +60,10 @@ right type and signedness. ...@@ -60,10 +60,10 @@ right type and signedness.
:: ::
from cpython cimport array from cpython cimport array as c_array
from array import array from array import array
cdef array.array a = array('i', [1, 2, 3]) cdef c_array.array a = array('i', [1, 2, 3])
# access underlying pointer: # access underlying pointer:
print a.data.as_ints[0] print a.data.as_ints[0]
...@@ -80,14 +80,14 @@ zero when requested. ...@@ -80,14 +80,14 @@ zero when requested.
:: ::
from cpython cimport array from cpython cimport array as c_array
from array import array from array import array
cdef array.array int_array_template = array('i', []) cdef c_array.array int_array_template = array('i', [])
cdef array.array newarray cdef c_array.array newarray
# create an array with 3 elements with same type as template # create an array with 3 elements with same type as template
newarray = array.clone(int_array_template, 3, zero=False) newarray = c_array.clone(int_array_template, 3, zero=False)
An array can also be extended and resized; this avoids repeated memory An array can also be extended and resized; this avoids repeated memory
reallocation which would occur if elements would be appended or removed reallocation which would occur if elements would be appended or removed
...@@ -95,13 +95,13 @@ one by one. ...@@ -95,13 +95,13 @@ one by one.
:: ::
from cpython cimport array from cpython cimport array as c_array
from array import array from array import array
cdef array.array a = array('i', [1, 2, 3]) cdef c_array.array a = array('i', [1, 2, 3])
cdef array.array b = array('i', [4, 5, 6]) cdef c_array.array b = array('i', [4, 5, 6])
# extend a with b, resize as needed # extend a with b, resize as needed
array.extend(a, b) c_array.extend(a, b)
# resize a, leaving just original three elements # resize a, leaving just original three elements
array.resize(a, len(a) - len(b)) c_array.resize(a, len(a) - len(b))
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