Get amount of bytes in a file

[chesschaser]

Hi guys!

I am writing a program and it has a variable in it of type bytes. i need to get the amount of bytes this variable contains.
Any help will be appreciated.

Thanks!

[deanhystad]

The same way you get the number of items in any collection; len(collection).

x = b'123456789'
print(len(x))

Output:
9