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>>> import arr
>>> from Numeric import array
>>> print arr.foo.__doc__
foo - Function signature:
  a = foo(a,[overwrite_a])
Required arguments:
  a : input rank-2 array('d') with bounds (n,m)
Optional arguments:
  overwrite_a := 0 input int
Return objects:
  a : rank-2 array('d') with bounds (n,m)

>>> a=arr.foo([[1,2,3],
...            [4,5,6]])
copied an array using PyArray_CopyFromObject: size=6, elsize=8
>>> print a
[[ 1.  3.  4.]
 [ 3.  5.  6.]]
>>> a.iscontiguous(), arr.has_column_major_storage(a)
(0, 1)
>>> b=arr.foo(a)              # even if a is proper-contiguous
...                           # and has proper type, a copy is made
...                           # forced by intent(copy) attribute
...                           # to preserve its original contents
... 
copied an array using copy_ND_array: size=6, elsize=8
>>> print a
[[ 1.  3.  4.]
 [ 3.  5.  6.]]
>>> print b
[[ 1.  4.  5.]
 [ 2.  5.  6.]]
>>> b=arr.foo(a,overwrite_a=1) # a is passed directly to Fortran
...                            # routine and its contents is discarded
... 
>>> print a
[[ 1.  4.  5.]
 [ 2.  5.  6.]]
>>> print b
[[ 1.  4.  5.]
 [ 2.  5.  6.]]
>>> a is b                       # a and b are acctually the same objects
1
>>> print arr.foo([1,2,3])       # different rank arrays are allowed
copied an array using PyArray_CopyFromObject: size=3, elsize=8
[ 1.  1.  2.]
>>> print arr.foo([[[1],[2],[3]]])
copied an array using PyArray_CopyFromObject: size=3, elsize=8
[ [[ 1.]
  [ 3.]
  [ 4.]]]
>>>
>>> # Creating arrays with column major data storage order:
...
>>> s = arr.as_column_major_storage(array([[1,2,3],[4,5,6]]))
copied an array using copy_ND_array: size=6, elsize=4
>>> arr.has_column_major_storage(s)
1
>>> print s
[[1 2 3]
 [4 5 6]]
>>> s2 = arr.as_column_major_storage(s)
>>> s2 is s    # an array with column major storage order 
               # is returned immediately
1