diff --git a/example/python/prepare.sh b/example/python/prepare.sh
index fb1602eca1..1942b49784 100755
--- a/example/python/prepare.sh
+++ b/example/python/prepare.sh
@@ -1,9 +1,11 @@
 #!/usr/bin/env bash
 
+cd $(dirname $0)
+
 # generate iroha lib
 cmake -DSWIG_PYTHON=ON ../..
 make _iroha
 
 # generate proto files in current dir
-protoc --proto_path=../../schema --python_out=. block.proto primitive.proto commands.proto queries.proto responses.proto endpoint.proto yac.proto ordering.proto loader.proto
-python -m grpc_tools.protoc --proto_path=../../schema --python_out=. --grpc_python_out=. endpoint.proto yac.proto ordering.proto loader.proto
+protoc --proto_path=../../schema --python_out=. block.proto primitive.proto commands.proto queries.proto responses.proto endpoint.proto
+python2 -m grpc_tools.protoc --proto_path=../../schema --python_out=. --grpc_python_out=. endpoint.proto yac.proto ordering.proto loader.proto
diff --git a/example/python/tx-example.py b/example/python/tx-example.py
index 5d5cb78c27..4fd5a2b9a9 100644
--- a/example/python/tx-example.py
+++ b/example/python/tx-example.py
@@ -62,7 +62,7 @@
 
 if status != "COMMITTED":
     print("Your transaction wasn't committed")
-    exit()
+    exit(1)
 
 query = queryBuilder.creatorAccountId(creator) \
     .createdTime(current_time) \
@@ -78,7 +78,7 @@
 
 if not query_response.HasField("asset_response"):
     print("Query response error")
-    exit(0)
+    exit(1)
 else:
     print("Query responsed with asset response")
 
@@ -87,3 +87,4 @@
 print("Precision =", asset_info.precision)
 
 print("done!")
+exit(0)