python iter_unpack to numpy array

To use the iter_unpack function in Python to create a NumPy array, you can follow these steps:

1. Import the necessary libraries:

import numpy as np
import struct

2. Define the format string to unpack the binary data:

fmt = '<fff'

This format string specifies that the binary data contains three floats in little-endian byte order.

3. Read the binary data into a buffer:

with open('data.bin', 'rb') as f:
    buf = f.read()

4. Use iter_unpack to unpack the binary data into a list of tuples:

data = list(struct.iter_unpack(fmt, buf))

5. Convert the list of tuples to a NumPy array:

arr = np.array(data)

The resulting arr array will have shape (N, 3), where N is the number of tuples in the binary data file. Each row of the array will contain the three floats from the corresponding tuple in the binary data.