Python: How to reverse an objects string function in python

Question

For example, I have a class Wall (doesnt have an init)

if a = Wall()

and str(a) outputs: '#'

if i have a string containing '####'

how can i turn that string into a list, that has the name of the class object like this: [Wall(), Wall(), Wall(), Wall()]

Answer 1

You can use a list comprehension with a filtering clause:

walls = [Wall() for char in string
         if char == '#']

Answer 2

You should make an explicit mapping dictionary that tells what each of the characters in the string is supposed to mean.

wall = object()

mapping = {
    "#": wall
}

string = '####'

result = [mapping[ch] for ch in string]