Bytearray size on disk

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#1 by (3 votes)

1

Let's suppose I convert any image to bytearray .

with open("img.png", "rb") as imageFile:
  f = imageFile.read()
  b = bytearray(f)

print b[0]

How do I know how much disk space this bytearray will occupy if I decide to save it.

python python-3.x

asked by anonymous 03.07.2018 / 22:22

1 answer

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score 3 · Accepted Answer

You can use the native len() function to calculate the size in bytes of a bytearray , see:

with open("img.png", "rb") as imageFile:
    f = imageFile.read()
    b = bytearray(f)

print(len(b))

Output:

Comparing:

$ ls -al img.png 
-rw-rw-r-- 1 lacobus lacobus 384373 Jul  3 17:24 img.png