for generating database files when I run "hhsuitedb.py" got this error--

python hhsuitedb.py -o ../data/test/hfm -ia3m -cpu 3
Traceback (most recent call last):
  File "hhsuitedb.py", line 38, in <module>
    import a3m
  File "/home/amish/programs/hh/hh-suite-3.0-beta.1/scripts/a3m.py", line 79
    allowed_ss_conf_states = set({"0","1","2","3","4","5","6","7","8","9"})
                                     ^
SyntaxError: invalid syntax

I am using hh-suit. 3.0 version.

Please help me out.