having both dynamic and static variables

[Yingjie Lan]

Hi everyone,

Variables in Python are resolved dynamically at runtime, which comes at a 
performance cost. However, a lot of times we don't need that feature. Variables 
can be determined at compile time, which should boost up speed. Therefore, I 
wonder if it is a good idea to have static variables as well. So at compile 
time, a variable is determined to be either static  or dynamic (the reference of 
a static varialbe is determined at compile time -- the namespace implementation 
will consist of two parts, a tuple for static variables and a dict for dynamic 
ones). The resolution can be done at the second pass of compilation. By default, 
variables are considered static. A variables is determined dynamic when: 1. it 
is declared dynamic; 2. it is not defined locally and the nearest namespace has 
it declared dynamic. A static variable can't be deleted, so a deleted variable 
must be a dynamic one: we can either enforce that the variable must be 
explicitly declared or allow a del statement to implicitly declare a dynamic 
variable.

Any thoughts?

Yingjie