extra python_wrapper change needed for last patch

                     minchunk <= N <= maxchunk required

   put(index) = return indexed chunk to pool (same index returned by get)

   int size() = return total size of allocated pages in bytes

public varaibles:

public variables:

   ndatum = total # of stored datums

   nchunk = total # of stored chunks

   size = total size of all allocated pages in daums

  void invoke_function(int, char *) {}

  int find(char *) {return -1;}

  int variable_match(char *, char *, int) {return -1;}

  char *long_string(int) {return NULL;}

};

}