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I am doing a script with python. There I have many raster in canvas (qgis) which I would like to know size in MB. I am searching function in python that give me this result.

Anyone can help me?

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Try referring to this Stack Overflow post. They are looking at zip files, but it should work fine for your raster file.

If you are using a type of raster that is made up of multiple files, then I would suggest getting the file size of each and summing it.

The code would be similar to:

import os
os.path.getsize(#your file here)

As the post says, you can shift it to MB like this:

os.path.setsize(#your file here) >> 20

Credit definitely goes to Mark Longair and his answer on the referenced form post.

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Using hurry.filesize you could do something like this :

import os
from hurry.filesize import size

raster_size = os.path.getsize('YOUR_PATH_HERE')
size(raster_size, system=alternative)

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