File i o with memory mapping using python mmap

file i/o with memory mapping in python using `mmap` is a powerful technique for efficiently reading and writing large files by mapping them directly into memory. this approach can be particularly useful when dealing with files that are too large to fit entirely in memory.

here's a step-by-step tutorial on how to perform file i/o with memory mapping using `mmap` in python:

1. import the required modules:

2. open a file in read and write mode and create a memory map object:

3. read data from the memory map:

4. write data to the memory map:

5. close the memory map and the file:

6. example demonstrating file i/o with memory mapping in python:

by using memory mapping with `mmap` in python, you can efficiently read and write large files without loading them entirely into memory, which can lead to better performance and reduced memory usage.

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