How to fix this Python class problem

class character():
    def __init__(self):
        self.name = " "
        self.race = " "
        self.characterClass = " "
        self.gender = " "
        self.strength = random.randint(3,18)
        self.dexterity = random.randint(3,18)
        self.constitution = random.randint(3,18)
        self.intelligence = random.randint(3,18)
        self.wisdom = random.randint(3,18)
        self.charisma = random.randint(3,18)
        self.advantage = advantage = False
        self.languages = []
        magic_sleep_immunity = 0 
        low_light_vision = 0
        proficincy = []
        Darkvision = 0
        stonecunning = 0
        stability = 0
            
    def __getRace__():
        races = ['human', 'elf', 'dwarf',]
        racec = input()
        if racec in races:
            if racec == "human":
                race = "human"
                size = "medium"
                languages.append("Common")
                speed = 30
                human_desc = "Humans are versitile in any role but do not have a specialized role"
                print(human_desc)
            elif racec == "elf":
                race = "elf"
                dexterity += 2
                constitution -= 2
                size = "medium"
                speed = 30
                magic_sleep_immunity = 1
                low_light_vision = 1
                proficincy.append("longsword", "rapier", "longbow", "shortbow")
                #Gains advantage on Listen, Search, and Spot checks
                languages.append("Common", "Elvish")
                elf_desc = "Elves are skillful but frail. They are good as wizards and marksman"
                print(elf_desc)
            elif racec == "dwarf":
                race = "race"
                constitution += 2
                charisma -= 2
                size = "medium"
                speed = 20 # However, dwarves can move at this speed even when wearing medium or heavy armor or whose speed is reduced in such conditions).
                Darkvision = 1
                stonecunning = 1
                stability = 1
                proficincy.append("dwarven waraxe", "dwarven urgroshes")
                #Advantage on: Poison, spells, against orcs and gobilnoids, dodging giants, and apraise and craft checks that include metal or precious gems
                languages.append("Common", "Dwarvish")
                dwarf_desc = "Dwarves are tougher but gruff and a bit slower, They are great warriors"

Traceback (most recent call last):
  File "main.py", line 36, in <module>
    ac.character.__getRace__()
  File "/usercode/Actual_Functions.py", line 78, in __getRace__
    constitution += 2
UnboundLocalError: local variable 'constitution' referenced before assignment