Python subprocess PIPE로 연결하기

command1 = f'objdump -M intel -d Binary{stage}'.split(' ')
command2 = 'grep -A30 <main>'.split(' ')

main_parse = subprocess.Popen(command1,stdout=subprocess.PIPE, stderr=subprocess.PIPE)
obj_parse = subprocess.Popen(command2, stdin=main_parse.stdout, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
main_parse.stdout.close()

output = obj_parse.communicate()[0].decode().split('\n')[4]
buf_size = int(output.split(',')[1].strip(),16)

main_parse.kill()
obj_parse.kill()