Keep the lifespan of variable after multiple function calls?

Question

Assuming:

def myfunc(x):
    my_list  = []
    list.append(x)

is there a keyword to stop a variable(my_list) from being reassigned? Let\'s supp

Answer 1

I believe the behaviour you're seeking is almost exactly how mutable default arguments work in python: instantiated only during function definition.

def myfunc(x,*args,my_list=[]):
    my_list.append(x)

The *args will protect the list from being overwritten by an erroneously passed second argument.