Update README.md

README.md

@@ -4,6 +4,7 @@ http://freeopcua.github.io/, https://github.com/FreeOpcUa/python-opcua
 [![Build Status](https://travis-ci.org/FreeOpcUa/python-opcua.svg?branch=master)](https://travis-ci.org/FreeOpcUa/python-opcua)
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 [![Code Coverage](https://scrutinizer-ci.com/g/FreeOpcUa/python-opcua/badges/coverage.png?b=master)](https://scrutinizer-ci.com/g/FreeOpcUa/python-opcua/?branch=master)
+[![Codacy Badge](https://api.codacy.com/project/badge/grade/f7f9a138ee7c4541b3b794b86e61e929)](https://www.codacy.com/app/olivier-roulet/python-opcua)
 
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