fix hardware service

Azaion.Inference/hardware_service.pyx

@@ -59,13 +59,17 @@ cdef class HardwareService:
         # in case of subprocess error do:
         # cdef bytes os_command_bytes = os_command.encode('utf-8')
         # and use os_command_bytes
+
         result = subprocess.check_output(os_command, shell=True).decode('utf-8')
         lines = [line.strip() for line in result.splitlines() if line.strip()]
 
         cdef str cpu = lines[0].replace("Name=", "").replace("  ", " ")
         cdef str gpu = lines[1].replace("Name=", "").replace("  ", " ")
         # could be multiple gpus
-        cdef str memory = lines[-2].replace("TotalVisibleMemorySize=", "").replace("  ", " ")
-        cdef str drive_serial = lines[-1]
 
-        return f'CPU: {cpu}. GPU: {gpu}. Memory: {memory}. Drive Serial: {drive_serial}'
+        len_lines = len(lines)
+        cdef str memory = lines[len_lines-2].replace("TotalVisibleMemorySize=", "").replace("  ", " ")
+        cdef str drive_serial = lines[len_lines-1]
+
+        cdef str res =  f'CPU: {cpu}. GPU: {gpu}. Memory: {memory}. DriveSerial: {drive_serial}'
+        return res