fixed bug in simil info

utils/similarity/info.py

@@ -1,5 +1,6 @@
 import logging
 import sys
+import os.path
 import traceback
 
 from fastText import load_model
@@ -11,8 +12,13 @@ logger = logging.getLogger("Slither-simil")
 def info(args):
 
     try:
+
         model = args.model
+        if os.path.isfile(model): 
             model = load_model(model)
+        else:
+            model = None
+
         filename = args.filename
         contract = args.contract
         solc = args.solc
@@ -31,12 +37,13 @@ def info(args):
         if len(irs) == 0:
             sys.exit(-1)
         
-        x = "-".join([filename,contract,fname])
+        x = (filename,contract,fname)
         y = " ".join(irs[x])
 
-        fvector = model.get_sentence_vector(y)
         print("Function {} in contract {} is encoded as:".format(fname, contract))
         print(y)
+        if model is not None:
+            fvector = model.get_sentence_vector(y)
             print(fvector)
 
     except Exception: