Let user know what to do when library file could not be found

Signed-off-by: Szczepan Zalega <szczepan@nitrokey.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/python_bindings_example.py b/python_bindings_example.py
index 6ddcbc4..a8f0dbb 100755
--- a/python_bindings_example.py
+++ b/python_bindings_example.py
@@ -60,6 +60,8 @@ def get_library():
             print("File does not exist: " + p)
     if not C:
         print("No library file found")
+        print("Please set the path using LIBNK_PATH environment variable to existing library or compile it (see "
+              "README.md for details)")
         sys.exit(1)
 
     return C