memoryview Class Reference

#include <pytypes.h>

Inheritance diagram for memoryview:

Public Member Functions
	memoryview (const buffer_info &info)
Public Member Functions inherited from object
template<typename T >
T	cast () &&
template<typename T >
T	cast () const &
template<>
void	cast () const &
	object ()=default
	object (const object &o)
	Copy constructor; always increases the reference count. More...
	object (handle h, borrowed_t)
	object (handle h, stolen_t)
	object (object &&other) noexcept
	Move constructor; steals the object from other and preserves its reference count. More...
object &	operator= (const object &other)
object &	operator= (object &&other) noexcept
	PYBIND11_DEPRECATED ("Use reinterpret_borrow<object>() or reinterpret_steal<object>()") object(handle h
handle	release ()
	~object ()
	Destructor; automatically calls handle::dec_ref() More...
Public Member Functions inherited from handle
template<typename T >
T	cast () const
template<>
void	cast () const
bool	check () const
const handle &	dec_ref () const &
	handle ()=default
	The default constructor creates a handle with a nullptr-valued pointer. More...
template<typename T , detail::enable_if_t< detail::all_of< detail::none_of< std::is_base_of< handle, T >, detail::is_pyobj_ptr_or_nullptr_t< T >>, std::is_convertible< T, PyObject * >>::value, int > = 0>
	handle (T &obj)
	Enable implicit conversion through T::operator PyObject *(). More...
template<typename T , detail::enable_if_t< detail::is_pyobj_ptr_or_nullptr_t< T >::value, int > = 0>
	handle (T ptr)
const handle &	inc_ref () const &
	operator bool () const
	Return true when the handle wraps a valid Python object. More...
bool	operator!= (const handle &h) const
bool	operator== (const handle &h) const
PyObject *&	ptr ()
PyObject *	ptr () const
	Return the underlying PyObject * pointer. More...

Static Public Member Functions
template<typename T >
static memoryview	from_buffer (const T *ptr, detail::any_container< ssize_t > shape, detail::any_container< ssize_t > strides)
static memoryview	from_buffer (const void *ptr, ssize_t itemsize, const char *format, detail::any_container< ssize_t > shape, detail::any_container< ssize_t > strides)
template<typename T >
static memoryview	from_buffer (T *ptr, detail::any_container< ssize_t > shape, detail::any_container< ssize_t > strides, bool readonly=false)
static memoryview	from_buffer (void *ptr, ssize_t itemsize, const char *format, detail::any_container< ssize_t > shape, detail::any_container< ssize_t > strides, bool readonly=false)
static memoryview	from_memory (const void *mem, ssize_t size)
static memoryview	from_memory (void *mem, ssize_t size, bool readonly=false)
Static Public Member Functions inherited from handle
static std::size_t	inc_ref_counter ()

Additional Inherited Members
Public Attributes inherited from object
bool	is_borrowed: handle(h) { if (is_borrowed) { inc_ref()
Protected Attributes inherited from handle
PyObject *	m_ptr = nullptr

Detailed Description

Definition at line 2290 of file pytypes.h.

Constructor & Destructor Documentation

memoryview()

memoryview::memoryview ( const buffer_info &  info )

inlineexplicit

\rst Creates memoryview from buffer_info.

buffer_info must be created from buffer::request(). Otherwise throws an exception.

For creating a memoryview from objects that support buffer protocol, use memoryview(const object& obj) instead of this constructor. \endrst

Definition at line 2303 of file pytypes.h.

Member Function Documentation

from_buffer() [1/4]

template<typename T >

static memoryview memoryview::from_buffer ( const T *  ptr, detail::any_container< ssize_t >  shape, detail::any_container< ssize_t >  strides  )

inlinestatic

Definition at line 2369 of file pytypes.h.

from_buffer() [2/4]

static memoryview memoryview::from_buffer ( const void *  ptr, ssize_t  itemsize, const char *  format, detail::any_container< ssize_t >  shape, detail::any_container< ssize_t >  strides  )

inlinestatic

Definition at line 2346 of file pytypes.h.

from_buffer() [3/4]

template<typename T >

static memoryview memoryview::from_buffer ( T *  ptr, detail::any_container< ssize_t >  shape, detail::any_container< ssize_t >  strides, bool  readonly = false  )

inlinestatic

Definition at line 2356 of file pytypes.h.

from_buffer() [4/4]

static memoryview memoryview::from_buffer ( void *  ptr, ssize_t  itemsize, const char *  format, detail::any_container< ssize_t >  shape, detail::any_container< ssize_t >  strides, bool  readonly = false  )

static

\rst Creates memoryview from static buffer.

This method is meant for providing a memoryview for C/C++ buffer not managed by Python. The caller is responsible for managing the lifetime of ptr and format, which MUST outlive the memoryview constructed here.

See also: Python C API documentation for PyMemoryView_FromBuffer_.

.. _PyMemoryView_FromBuffer: https://docs.python.org/c-api/memoryview.html#c.PyMemoryView_FromBuffer

:param ptr: Pointer to the buffer. :param itemsize: Byte size of an element. :param format: Pointer to the null-terminated format string. For homogeneous Buffers, this should be set to format_descriptor<T>::value. :param shape: Shape of the tensor (1 entry per dimension). :param strides: Number of bytes between adjacent entries (for each per dimension). :param readonly: Flag to indicate if the underlying storage may be written to. \endrst

from_memory() [1/2]

static memoryview memoryview::from_memory ( const void *  mem, ssize_t  size  )

inlinestatic

Definition at line 2397 of file pytypes.h.

from_memory() [2/2]

static memoryview memoryview::from_memory ( void *  mem, ssize_t  size, bool  readonly = false  )

inlinestatic

\rst Creates memoryview from static memory.

This method is meant for providing a memoryview for C/C++ buffer not managed by Python. The caller is responsible for managing the lifetime of mem, which MUST outlive the memoryview constructed here.

See also: Python C API documentation for PyMemoryView_FromBuffer_.

.. _PyMemoryView_FromMemory: https://docs.python.org/c-api/memoryview.html#c.PyMemoryView_FromMemory \endrst

Definition at line 2388 of file pytypes.h.

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The documentation for this class was generated from the following file:

• pytypes.h