2DドットRPGを作成したい

###前提・実現したいこと
python3.6.1(pygame)を使い、キャラクターを動かしたい。
画像を回し、歩いてるように見せかける予定。

###発生している問題・エラーメッセージ

Traceback (most recent call last):
  File "beta.py", line 86, in <module>
    test_play()
  File "beta.py", line 27, in __init__
    self.update()
TypeError: update() takes 0 positional arguments but 1 was given

###該当のソースコード

python
1import pygame
2from pygame.locals import *
3import sys
4import os
5SCR_RECT = Rect(0, 0, 640, 480)
6PLAYER_IMG = [[0 for i in range(3)] for j in range(4)]
7IMG_NAME = ["player_down","player_left","player_right","player_up"]
8
9class test_play:
10    def __init__(self):
11        pygame.init()
12        screen = pygame.display.set_mode(SCR_RECT.size)
13        pygame.display.set_caption("テスト画面")
14
15        #画像
16        for j in range(4):
17            for i in range(3):
18                PLAYER_IMG[j][i] = pygame.image.load("image/"+IMG_NAME[j]+"_"+str(i)+".png").convert_alpha()
19                print("image/"+IMG_NAME[j]+"_"+str(i)+".png==>success")
20        #グループ作成
21        self.all = pygame.sprite.RenderUpdates()
22        Player.containers = self.all
23        Player()
24        clock = pygame.time.Clock()
25        while True:
26            clock.tick(60)
27            self.update()
28            self.draw(screen)
29            pygame.display.update()
30            self.key_handl()
31
32    def key_handl(self):
33        for event in pygame.event.get():
34            if event.type == QUIT:
35                pygame.quit()
36                sys.exit()
37            if event.type == KEYDOWN:
38                if event.key == K_ESCAPE:
39                    pygame.quit()
40                    sys.exit()
41    def update():
42        self.all.update()
43    def draw(self, screen):
44        screen.fill((0,0,0))
45        self.all.draw(screen)
46
47class Player(pygame.sprite.Sprite):
48    MOVE_SPEED = 5.0
49
50    def __init__(self):
51        pygame.sprite.Sprite.__init__(self, self.containers)
52        self.image = PLAYER_IMG[0][0]
53        self.Rect = self.image.get_rect()
54        self.Rect.bottom = SCR_RECT.bottom
55        #小数点
56        self.f_x = float(self.Rect.x)
57        self.f_y = float(self.Rect.y)
58        self.move_x = 0.0
59        self.move_y = 0.0
60
61    def update(self):
62        key_handl = pygame.key.get_pressed()
63
64        #アクション
65        if key_handl[K_RIGHT]:
66            self.image = PLAYER_IMG[0][7]
67            self.move_x = self.MOVE_SPEED
68            print("right")
69        elif key_handl[K_LEFT]:
70            self.image = PLAYER_IMG[0][4]
71            self.move_x = -self.MOVE_SPEED
72            print("left")
73        else:
74            self.move_x = 0.0
75
76        self.f_x = self.move_x
77
78        #intへ整形
79        self.Rect.x = int(self.f_x)
80        self.Rect.y = int(self.f_y)
81        
82
83
84
85if __name__ == "__main__":
86    test_play()