title: How to execute python script from bitbake bb file during yocto build
body: <p><strong>Question</strong>:
  Symilary as in subject - I want to execute python script during yocto build.</p>
  
  <p><strong>Problem description</strong>:
  I have ready python script witch I want to execute during processing bb file of some meta-layer. I have no idea how to do this properly. Does anybody can support me in this case?</p>