archid via elftools

elfid.py

try:
    from elftools.elf.elffile import ELFFile
except:
    ELFFile = None
if ELFFile is not None:
    import sys
    elf_file=open(sys.argv[1], 'rb')
    machine = ELFFile(elf_file).get_machine_arch().lower()
    print(machine)