diff --git a/docs/develop.md b/docs/develop.md
index b4c4fdd..a99f7ed 100644
--- a/docs/develop.md
+++ b/docs/develop.md
@@ -101,7 +101,8 @@ your r329
 
 ## pypi upload
 
-- python3 setup.py sdist build
+- python3 setup.py sdist
+- python3 setup.py build && pip3 install .
 - python3.8 setup.py bdist_wheel maix_v83x
 
 > pip3 install twine
diff --git a/ext_modules/_maix_image/_maix_image.cpp b/ext_modules/_maix_image/_maix_image.cpp
index 03601fe..7d73c34 100644
--- a/ext_modules/_maix_image/_maix_image.cpp
+++ b/ext_modules/_maix_image/_maix_image.cpp
@@ -264,6 +264,7 @@ maix_image &maix_image::_open_file(std::string path)
   libmaix_image_t *tmp_img = NULL;
   if (libmaix_cv_image_open_file(&tmp_img, path.c_str()) != 0)
   {
+    printf("[image.open] %s file does not exist\r\n", path.c_str());
     this->v_close();
     return *this;
   }
diff --git a/ext_modules/libmaix b/ext_modules/libmaix
index 11a7725..1f3f231 160000
--- a/ext_modules/libmaix
+++ b/ext_modules/libmaix
@@ -1 +1 @@
-Subproject commit 11a7725696e03e748f9c5fb64b7682d4d53c3fca
+Subproject commit 1f3f2313790e06f45e614c1e81a47699db99702f
diff --git a/maix/__init__.py b/maix/__init__.py
index 4436ff8..29ecaef 100644
--- a/maix/__init__.py
+++ b/maix/__init__.py
@@ -1,8 +1,13 @@
 
-__all__ = ['nn', 'display', 'camera']
+version='0.4.8'
+
+__all__ = ['nn', 'display', 'camera', 'image']
 
 try:
   from . import nn
   __all__.extend(['nn'])
 except ModuleNotFoundError as e:
   pass
+
+import signal
+signal.signal(signal.SIGINT,lambda signum,frame:exit(0))
diff --git a/setup.py b/setup.py
index af7fd71..25088e4 100644
--- a/setup.py
+++ b/setup.py
@@ -4,13 +4,10 @@
 setup.py file for maixpy3
 """
 
-import sys
-import platform
-from setuptools import setup, Extension, find_packages
+import sys, platform
+from setuptools import setup, find_packages
 
-ext_modules = []
-data_files = []
-py_modules = []
+ext_modules, data_files, py_modules = [], [], []
 
 sysstr = platform.system()
 
@@ -30,9 +27,11 @@
 data_files.extend(_maix_data_files)
 py_modules.extend(_maix_py_modules)
 
+from maix import version
+
 setup(
   name='maixpy3',
-  version='0.4.8',
+  version=version,
   license='MIT',
   author='Sipeed',
   author_email="support@sipeed.com",