Modifying Classes

[Windspar]

Explain classes on my site.

Quick class run down.
self refer to class object. Class object must be created.

player = Player(...) # create a new player object
player2 = Player(...) # create another new player object

player and player2 are to different objects.

If your function effects class only. Then make it part of the class.
Example

#Class
class Player():
    def __init__(self, name="",
                strength=0,
                constitution=0,
                intelligence=0,
                health=0,
                mana=0,
                attack=0):

        self.name = name
        self.str = strength
        self.con = constitution
        self.int = intelligence
        self.hp = health
        self.mp = mana
        self.attack = attack

    # Allows to print and represent it self in other areas.
    def __repr__(self):
        return str(vars(self))

    # Method
    def creation(self):
        name = input('What do they call you?: ')
        self.name = name
        print('Welcome {}, Make your Character!'.format(self.name))

        points = 10
        for points_left in range(points):
            print('1: Add point in Strength')
            print('2: Add point in Constitution')
            print('3: Add point in Intelligence')

            retries = 0
            while True:
                choice = input('Add 1 to a skill: ')
                choice = choice.strip()
                if choice in ['1', '2', '3']:
                    break
                print('Try Again !')
                retries += 1
                if retries > 3:
                    print('You having to much trouble. Seek assistent.\nGood Bye')
                    exit()

            print('You have {} points left!'.format(points - points_left - 1))

            if choice == '1':
                self.str += 1
                print("strength:", self.str)
            elif choice == '2':
                self.con += 1
                print("constitution:", self.con)
            elif choice == '3':
                self.int += 1
                print("intelligence:", self.int)

def main():
    player = Player()
    player.creation()
    print(player)

main()

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Couple of other tips.
Try avoid keyword names.
Try to follow style guide.