.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "11_demos\python_packages\numpy\demo_copy.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

    .. note::
        :class: sphx-glr-download-link-note

        :ref:`Go to the end <sphx_glr_download_11_demos_python_packages_numpy_demo_copy.py>`
        to download the full example code.

.. rst-class:: sphx-glr-example-title

.. _sphx_glr_11_demos_python_packages_numpy_demo_copy.py:

Copy
======

.. GENERATED FROM PYTHON SOURCE LINES 4-10

.. code-block:: Python


    import numpy as np


    a = np.array([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]])








.. GENERATED FROM PYTHON SOURCE LINES 12-13

No new object is created!

.. GENERATED FROM PYTHON SOURCE LINES 13-17

.. code-block:: Python

    b = a
    b is a






.. rst-class:: sphx-glr-script-out

 .. code-block:: none


    True



.. GENERATED FROM PYTHON SOURCE LINES 18-19

unique identifier of an object

.. GENERATED FROM PYTHON SOURCE LINES 19-25

.. code-block:: Python

    def f(x):
        print(id(x))


    id(a)





.. rst-class:: sphx-glr-script-out

 .. code-block:: none


    3074519997520



.. GENERATED FROM PYTHON SOURCE LINES 26-28

.. code-block:: Python

    f(a)





.. rst-class:: sphx-glr-script-out

 .. code-block:: none

    3074519997520




.. GENERATED FROM PYTHON SOURCE LINES 29-30

**View and shallow copy**

.. GENERATED FROM PYTHON SOURCE LINES 30-33

.. code-block:: Python

    c = a.view()
    c is a





.. rst-class:: sphx-glr-script-out

 .. code-block:: none


    False



.. GENERATED FROM PYTHON SOURCE LINES 34-35

c is a view of the data owned by a

.. GENERATED FROM PYTHON SOURCE LINES 35-37

.. code-block:: Python

    c.base is a





.. rst-class:: sphx-glr-script-out

 .. code-block:: none


    True



.. GENERATED FROM PYTHON SOURCE LINES 38-40

.. code-block:: Python

    c.flags.owndata





.. rst-class:: sphx-glr-script-out

 .. code-block:: none


    False



.. GENERATED FROM PYTHON SOURCE LINES 41-42

shape of a doesn't change

.. GENERATED FROM PYTHON SOURCE LINES 42-44

.. code-block:: Python

    c = c.reshape((2, 6))








.. GENERATED FROM PYTHON SOURCE LINES 45-46

a's data changes

.. GENERATED FROM PYTHON SOURCE LINES 46-49

.. code-block:: Python

    c[0, 4] = 1234
    a





.. rst-class:: sphx-glr-script-out

 .. code-block:: none


    array([[   0,    1,    2,    3],
           [1234,    5,    6,    7],
           [   8,    9,   10,   11]])



.. GENERATED FROM PYTHON SOURCE LINES 50-51

Slicing an array returns a view of it

.. GENERATED FROM PYTHON SOURCE LINES 51-54

.. code-block:: Python

    s = a[:, 1:3]
    s





.. rst-class:: sphx-glr-script-out

 .. code-block:: none


    array([[ 1,  2],
           [ 5,  6],
           [ 9, 10]])



.. GENERATED FROM PYTHON SOURCE LINES 55-56

**Deep copy**

.. GENERATED FROM PYTHON SOURCE LINES 56-59

.. code-block:: Python

    d = a.copy()
    d is a





.. rst-class:: sphx-glr-script-out

 .. code-block:: none


    False



.. GENERATED FROM PYTHON SOURCE LINES 60-61

.. code-block:: Python

    d.base is a




.. rst-class:: sphx-glr-script-out

 .. code-block:: none


    False




.. _sphx_glr_download_11_demos_python_packages_numpy_demo_copy.py:

.. only:: html

  .. container:: sphx-glr-footer sphx-glr-footer-example

    .. container:: sphx-glr-download sphx-glr-download-jupyter

      :download:`Download Jupyter notebook: demo_copy.ipynb <demo_copy.ipynb>`

    .. container:: sphx-glr-download sphx-glr-download-python

      :download:`Download Python source code: demo_copy.py <demo_copy.py>`

    .. container:: sphx-glr-download sphx-glr-download-zip

      :download:`Download zipped: demo_copy.zip <demo_copy.zip>`