when make receive some problome

[tower111]

GEN i386-softmmu/config-devices.mak
GEN arm-softmmu/config-devices.mak
GEN mips-softmmu/config-devices.mak
GEN config-all-devices.mak
Building Sleuthkit, please wait...
GEN Sleuthkit
PREP Sleuthkit headers/libs
GEN config-host.h
GEN trace.h
GEN qemu-options.def
GEN qmp-commands.h
File "/home/tower/DECAF/decaf/scripts/qapi-commands.py", line 376
except getopt.GetoptError, err:
^
SyntaxError: invalid syntax
Makefile:214: recipe for target 'qmp-commands.h' failed
make: *** [qmp-commands.h] Error 1

when i use python3 can receive these problome.
I resolve it when use python2 then run make (run make in conda virtual env)