LinuxQuestions.org - python read binary file into array

- Linux - Newbie (https://www.linuxquestions.org/questions/linux-newbie-8/)

- - python read binary file into array (https://www.linuxquestions.org/questions/linux-newbie-8/python-read-binary-file-into-array-4175547091/)

python read binary file into array

hello pros!
im quite a newbie in python. please help me out!

so i have a hex file, that is about 2821 sector size. i want to create an array for every 128 sectors. is there an example to do this?

what ive done so far is, i read the hex file containment and added a comma after every 2 characters, to separate the values

Code:

f = open(file_location, "rb")

imgData=f.read(1444352)

f.close()



filebyte = imgData.encode('hex')



def insert_newlines(string, every=2):

    lines = []

    for i in xrange(0, len(string), every):

        lines.append(string[i:i+every])

    return ','.join(lines)



content = insert_newlines(filebyte)



real_content = content.split(',')



print real_content

Code:

f = open("binary", "rb")

r = f.read()

f.close()



sector = []



c = 0

for s in r:

    sector.append(s)

    c += 1

    if c == 128:

        sector.append(",")

        c = 0



print sector

If I understand this might give you the idea.

hi! that is what exactly what im trying to do. now im stuck else where

so, now, i have a list of hex values that i want to pack using struct.pack. so here's what i did after reading from the hex file

Code:



import sys,getopt



filename = file_location

blocksize = 1444352



opts,args = getopt.getopt(sys.argv[1:],'f:b:')

for o,a in opts:

        if o == '-f':

                filename = a

        if o == '-b':

                blocksize = a



offset = 0

with open(filename,"rb") as f:

        block = f.read(blocksize)

        str = ""

        for ch in block:

                str += hex(ord(ch))+" "





sector = []

c = 0

for s in str.split(' ') :

    sector.append(s)

    c += 1

    if c == 128 :

        sector.append("")

        c = 0

        sector  = ', '.join(sector)

        print sector

        #struct.pack('B', sector)

        sector = sector.split(',')

        for items in sector[0:127] :

            items = int(items, 16)

            #print items



        struct.pack('B', sector)

        break

but i keep getting error message "struct error : cannot convert argument to integer"
but ive already converted to int