How Write Part of a Binary Array?

[Assembler]

Windows 7
Python 3.8.10

I wish to read a binary file, and then write it's data to a different file, skipping the first 16 bytes.
How do I do that?

Python pseudo code:

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oldfile = open("oldfile.dat", mode="rb")    #Open old file for binary read newfile = open("newfile.dat", mode="wb")    #Open new file for binary write   olddata = oldfile.read()                    #Read the original file   #How do I write olddata, after the first 16 bytes, into newfile.dat? # newfile.write( From olddata[16] ?? )

[Gribouillis]

If the file's size is not too big, you could use pathlib directly

1 2	from pathlib import Path Path('newfile.dat').write_bytes(Path('oldfile.dat').read_bytes()[16:])

If it is a large file, you may want to process it by chunks. There is an interesting piece of code in the documentation of the iter() function. Here is how it applies here

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from functools import partial CHUNK = 8192  # choose your preferred value with open('oldfile.dat', 'rb') as filein:     filein.read(16)     with open('newfile.dat', 'wb') as fileout:         for block in iter(partial(filein.read, CHUNK), b''):             fileout.write(block)