locals().update(dictionary) doesn't add all the variables

Question

I have been loading variables using dictionary objects, but the values get updated. What am I missing here?

assert \"run_LMM\" in all_variables.keys()
local         


        

Answer 1

That's the expected behaviour, by the docs:

The contents of this dictionary should not be modified; changes may not affect the values of local and free variables used by the interpreter.

I think, one of the reasons for that is that whether a variable is global or local is defined during the function compilation, so that in:

def func():
    locals()['val'] = 1
    print val

the last statement always reads from the global variable, since the local variable is not declared. So, ability to add locals dynamically would make life harder.