Python: Seeing all files in Hex

Question

I am writing a python script which looks at common computer files and examines them for similar bytes, words, double word\'s. Though I need/want to see the files in Hex, ande c

Answer 1

You can read a set number of bytes by passing an integer argument to read:

32bits = file.read(4)

You can seek to a position in the file using seek:

file.seek(100) # Seeks to byte 100

Answer 2

if this will be more clear... : def hexfile(file_path): fp=open(file_path) while True: data = fp.read(4) if not data: break print data.encode('hex')

file_path is something like "C:/somedir/filename.ext" it nice method btw it will work nicely for me. :)

Answer 3

codecs.open(_file, "rb", "hex") is trying to decode the file's contents as being hex, which is why it's failing on you.

Considering your other "word at a time" target (I assume you mean "computer word", i.e. 32 bits?), you'll be better off encapsulating the open file into a class of your own. E.g.:

class HexFile(object):
    def __init__(self, fp, wordsize=4):
        self.fp = fp
        self.ws = wordsize
    def __iter__(self):
        while True:
            data = self.fp.read(self.ws)
            if not data: break
            yield data.encode('hex')

plus whatever other utility methods you'd find helpful, of course.