Which is better for this application python or c++.c#?

C# would probably be your best bet. People use that for many applications. It is sort of a mix between C++ and Java. C++, in my limited experience, seems to be used more for math applications. I don't know much about Python, but C# is also easier because it has the benefits from both C++ and Java. C# also has the .NET built right into it. So it is faster to just put it together. In C#, if you use the correct program for coding, most of the language is easy to work with and makes sense to most novices who use it.