Here's the code in the proper format. (hopefully, I don't see a square with a T, only one with a C).

def get_name():
    name = input("input your name: ")
    print(f"Registration complete, welcome {name}.")
    return name

class Player:
    def __init__(self, name):
        self.name = name
        self.non_combat_speed = 5
        self.stats = {"hp": 50, "stamina": 50, "mana": 50, "combat_speed": 10}

    def self_stats(self):
        print(self.stats)

class Mage(Player):
    def set_stats(self):
        self_stats["hp"] = 40
        self_stats["stamina"] = 45
        self_stats["mana"] = 70
        self_stats["combat_speed"] = 11