Data types for binary tree?

Question

Data Structures

Hello!
Do I understand correctly that for binary trees the data must:
1. be of a homogeneous nature and
2. implement comparison methods (for sorting)?
It is impossible to put a string, a number and a dictionary into a binary tree?

Answer 1

In fact, only the second point is important.
Because int and float can be compared.
Yes, and a line with a dictionary too - but context-dependent.