CODEWITHSUNDEEP
python-3.xsubprocesshexstdoutencode
keyvan vafaee
keyvan vafaee

Reputation: 466

unexpected extra backslash when reading data from stdout using subprocess

i have a python source code (with name source.py) that display some data like

b'testdata \xe3\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x1f\x00\x00\x00@\x00\......

on terminal.

i want to get this informations and save them on a variable, so i wrote this code :

import subprocess

    
batcmd= 'python3.8 source.py'
result = subprocess.check_output(batcmd, shell=True)
print (result)

output:

b'testdata \\xe3\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x1f\\x00\\x00\\x00@\\x00\\......

problem is any \ will duplicate 2 times!

how i can solve this issue ?

Notes :

1 - i can't edit source.py! i can't Manipulation it, we can only read data from terminal.

2 - i recently used _w_long_ and then i edited my post and algorithm , So if you see it in the comments, it's because and ignore it.

3- Stored data must remain in bytes

UPDATE:

i also tried :

from contextlib import redirect_stdout
import io,os


res = os.popen("decompyle3 start.py.pyc").read()
print (res)

print (res.encode('latin1'))

in this code : print(res), will print this data with type string in output :

"b'\xe3\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x1f\x00\x00\x00@\x00\x00\x00sV\x00\x00\x00e\x00e\x01d\x00d\x01\x84\x00d\x02d\x03d\x03d\x04d\x05d\x06d\x07d\x08d\td\x03d\x03d\nd\x0bd\x05d\x0cd\x08d\rd\x0ed\x0cd\x0fd\..."

so i want convert this string to Byte without any changing, i want this output :

b'\xe3\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x1f\x00\x00\x00@\x00\x00\x00sV\x00\x00\x00e\x00e\x01d\x00d\x01\x84\x00d\x02d\x03d\x03d\x04d\x05d\x06d\x07d\x08d\td\x03d\x03d\nd\x0bd\x05d\x0cd\x08d\rd\x0ed\x0cd\x0fd\...

i tried :

print (res.encode('latin1'))

that printed :

b\'\\xe3\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x1f\\x00\\x00\\x00@\\x00\\x00\\x00sV\\x00\\x00\\x00e\\x00e\\x01d\\x00d\\x01\\x84\\x00d\\x02d\\x03d\\x03d\\x04d\\x05d\\x06d\\x07d\\x08d\\td\\x03d\\x03d\\nd\\x0bd\\x05d\\x0cd\\x08d\\rd\\x0ed\\x0cd\\x0fd...

As we see any \ duplicated !

how solve this problem?

Upvotes: 0

Views: 205

Answers (1)

Musa
Musa

Reputation: 21

from contextlib import redirect_stdout
import io,os

with io.StringIO() as buf, redirect_stdout(buf):
    os.system("python3.8 source.py")
    res = buf.getvalue()
    print(res)

Upvotes: 1

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