Python built-in function memoryview (obj) usage, pythonmemoryview

Python built-in function memoryview (obj) usage, pythonmemoryview

The memoryview () function returns the memory view object (Momory view) of the given parameter ).

Syntax

Memoryview Syntax: memoryview (obj)

Parameter description: obj -- Object

Returned value: returns the list of tuples.

English document:

Class memoryview (obj)

Memoryview objects allow Python code to access the internal data of an object that supports the buffer protocol without copying.
Create a memoryview that references obj. obj must support the buffer protocol. Built-in objects that support the buffer protocol include bytes and bytearray.

Note:

1. The function returns the memory view object, which is actually the constructor of the memory view object (Momory view.

2. The so-called memory viewing object refers to packaging data that supports the buffer protocol and allowing Python code access without copying objects.

3. Python built-in objects that support the buffer protocol include bytes and bytearray.

Example

>>> v = memoryview(b'abcefg')>>> v[1]98>>> v[-1]103>>> v[1:4]<memory at 0x7f3ddc9f4350>>>> bytes(v[1:4])b'bce'

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