Meaning of lvalue and rvalue in python

Answer 1

an lvalue is an expression to which the unary & operator can be applied, whereas an rvalue is an expression to which the unary & operator can not be applied. (This is not entirely true in C++ if you overload said operator, but that's probably very bad practice.)
[by fred overflow]

Answer 2

please check this link:
https://msdn.microsoft.com/en-us/library/f90831hc.aspx

it's for c++, but I think it will clarify