What framework to select for application

[RobertIonescu]

i want to create an application using the python language which I really love. I already looked into some tutorials about different GUI designers for python, but I am not getting really into it when I am just trying around, so maybe someone can give me a hint...


What I have planned and requirements:

• First step is a Windows only application
  
• It should get a modern look, not that classic gui standards from 1998 :)
  
• Don't know if this is relevant for the GUI tool, but the application will need an database system.
  
• Possiblities to port the application to other systems in future, like MacOs, iOS, Android...
  
• Enough documentation to get into it without stucking around, I have enough python experience, but without GUI.
  
• Python 3 +
  

Thanks for help in advance