diff options
Diffstat (limited to 'Doc/library/array.rst')
| -rw-r--r-- | Doc/library/array.rst | 90 |
1 files changed, 53 insertions, 37 deletions
diff --git a/Doc/library/array.rst b/Doc/library/array.rst index d563cce..f1ab959 100644 --- a/Doc/library/array.rst +++ b/Doc/library/array.rst @@ -14,36 +14,54 @@ them is constrained. The type is specified at object creation time by using a :dfn:`type code`, which is a single character. The following type codes are defined: -+-----------+----------------+-------------------+-----------------------+ -| Type code | C Type | Python Type | Minimum size in bytes | -+===========+================+===================+=======================+ -| ``'b'`` | signed char | int | 1 | -+-----------+----------------+-------------------+-----------------------+ -| ``'B'`` | unsigned char | int | 1 | -+-----------+----------------+-------------------+-----------------------+ -| ``'u'`` | Py_UNICODE | Unicode character | 2 (see note) | -+-----------+----------------+-------------------+-----------------------+ -| ``'h'`` | signed short | int | 2 | -+-----------+----------------+-------------------+-----------------------+ -| ``'H'`` | unsigned short | int | 2 | -+-----------+----------------+-------------------+-----------------------+ -| ``'i'`` | signed int | int | 2 | -+-----------+----------------+-------------------+-----------------------+ -| ``'I'`` | unsigned int | int | 2 | -+-----------+----------------+-------------------+-----------------------+ -| ``'l'`` | signed long | int | 4 | -+-----------+----------------+-------------------+-----------------------+ -| ``'L'`` | unsigned long | int | 4 | -+-----------+----------------+-------------------+-----------------------+ -| ``'f'`` | float | float | 4 | -+-----------+----------------+-------------------+-----------------------+ -| ``'d'`` | double | float | 8 | -+-----------+----------------+-------------------+-----------------------+ - -.. note:: - - The ``'u'`` typecode corresponds to Python's unicode character. On narrow - Unicode builds this is 2-bytes, on wide builds this is 4-bytes. ++-----------+--------------------+-------------------+-----------------------+-------+ +| Type code | C Type | Python Type | Minimum size in bytes | Notes | ++===========+====================+===================+=======================+=======+ +| ``'b'`` | signed char | int | 1 | | ++-----------+--------------------+-------------------+-----------------------+-------+ +| ``'B'`` | unsigned char | int | 1 | | ++-----------+--------------------+-------------------+-----------------------+-------+ +| ``'u'`` | Py_UNICODE | Unicode character | 2 | \(1) | ++-----------+--------------------+-------------------+-----------------------+-------+ +| ``'h'`` | signed short | int | 2 | | ++-----------+--------------------+-------------------+-----------------------+-------+ +| ``'H'`` | unsigned short | int | 2 | | ++-----------+--------------------+-------------------+-----------------------+-------+ +| ``'i'`` | signed int | int | 2 | | ++-----------+--------------------+-------------------+-----------------------+-------+ +| ``'I'`` | unsigned int | int | 2 | | ++-----------+--------------------+-------------------+-----------------------+-------+ +| ``'l'`` | signed long | int | 4 | | ++-----------+--------------------+-------------------+-----------------------+-------+ +| ``'L'`` | unsigned long | int | 4 | | ++-----------+--------------------+-------------------+-----------------------+-------+ +| ``'q'`` | signed long long | int | 8 | \(2) | ++-----------+--------------------+-------------------+-----------------------+-------+ +| ``'Q'`` | unsigned long long | int | 8 | \(2) | ++-----------+--------------------+-------------------+-----------------------+-------+ +| ``'f'`` | float | float | 4 | | ++-----------+--------------------+-------------------+-----------------------+-------+ +| ``'d'`` | double | float | 8 | | ++-----------+--------------------+-------------------+-----------------------+-------+ + +Notes: + +(1) + The ``'u'`` type code corresponds to Python's obsolete unicode character + (:c:type:`Py_UNICODE` which is :c:type:`wchar_t`). Depending on the + platform, it can be 16 bits or 32 bits. + + ``'u'`` will be removed together with the rest of the :c:type:`Py_UNICODE` + API. + + .. deprecated-removed:: 3.3 4.0 + +(2) + The ``'q'`` and ``'Q'`` type codes are available only if + the platform C compiler used to build Python supports C :c:type:`long long`, + or, on Windows, :c:type:`__int64`. + + .. versionadded:: 3.3 The actual representation of values is determined by the machine architecture (strictly speaking, by the C implementation). The actual size can be accessed @@ -55,8 +73,8 @@ The module defines the following type: .. class:: array(typecode[, initializer]) A new array whose items are restricted by *typecode*, and initialized - from the optional *initializer* value, which must be a list, object - supporting the buffer interface, or iterable over elements of the + from the optional *initializer* value, which must be a list, a + :term:`bytes-like object`, or iterable over elements of the appropriate type. If given a list or string, the initializer is passed to the new array's @@ -73,7 +91,7 @@ Array objects support the ordinary sequence operations of indexing, slicing, concatenation, and multiplication. When using slice assignment, the assigned value must be an array object with the same type code; in all other cases, :exc:`TypeError` is raised. Array objects also implement the buffer interface, -and may be used wherever buffer objects are supported. +and may be used wherever :term:`bytes-like object`\ s are supported. The following data items and methods are also supported: @@ -253,9 +271,7 @@ Examples:: Packing and unpacking of External Data Representation (XDR) data as used in some remote procedure call systems. - `The Numerical Python Manual <http://numpy.sourceforge.net/numdoc/HTML/numdoc.htm>`_ + `The Numerical Python Documentation <http://docs.scipy.org/doc/>`_ The Numeric Python extension (NumPy) defines another array type; see - http://numpy.sourceforge.net/ for further information about Numerical Python. - (A PDF version of the NumPy manual is available at - http://numpy.sourceforge.net/numdoc/numdoc.pdf). + http://www.numpy.org/ for further information about Numerical Python. |