fix code

x2paddle/convert.py

@@ -165,10 +165,22 @@ def main():
 
     if args.version:
         import x2paddle
-        print("x2paddle-{} with python>=3.5, paddlepaddle>=1.5.0\n".format(
+        print("x2paddle-{} with python>=3.5, paddlepaddle>=1.6.1\n".format(
             x2paddle.__version__))
         return
 
+    try:	
+        import paddle	
+        v0, v1, v2 = paddle.__version__.split('.')	
+		if v0 == 0 and v1 == 0 and v2 == 0:
+			print("You have installed paddlepaddle-dev? We're not sure it's working for x2paddle!"
+        elif int(v0) != 1 or int(v1) < 6:	
+            print("paddlepaddle>=1.6.1 is required")	
+            return	
+    except:	
+        print("paddlepaddle not installed, use \"pip install paddlepaddle\"")
+		return
+
     assert args.framework is not None, "--framework is not defined(support tensorflow/caffe/onnx)"
     assert args.save_dir is not None, "--save_dir is not defined"