我正在尝试阅读用户上传的图片，然后将图片显示回来。我想这样做而不保存上传的图像文件。
我有这样的代码：
import pygame
import time
import random
import Mycharacter
import enemy
import obstacle
import json
GREEN = (0, 255, 0)
class Controller:
def __init__(self):
pygame.init()
self.screen = pygame.display.set_mode((800, 800))
self.background = pygame.Surface(self.screen.get_size()).convert()
#self.button_image = pygame.image.load("start_button.png").convert
self.button = pygame.Rect(350, 50, 100, 100)
#self.button_image.get_rect()
self.font = pygame.font.Font("Shark_Soft_Bites.TTF", 60)
self.text = pygame.font.Font.render(self.font,"Start", True, (255, 0, 0))
#self.score_text = pygame.font.Font.render("Highscore: "+ str())
self.file = open("highscores.json", "r")
self.currentState = "Start"
self.obstacles = []
for i in range(5):
x = random.randrange(50, 600)
y = random.randrange(60, 700)
self.obstacles.append(obstacle.Obstacle((x, y), 'rock.png' ))
self.enemies = []
for i in range(3) :
if i == 0:
x = 725
y = 100
elif i == 1:
x = 75
y = 700
elif i == 2:
x = 725
y = 700
self.enemies.append(enemy.Enemy((x, y), "enemy.png"))
self.Mycharacter = Mycharacter.Mycharacter((75, 100), "head6.png")
self.mysprites = pygame.sprite.Group((self.Mycharacter,) + tuple(self.enemies) + tuple(self.obstacles))
self.mysprites2 = pygame.sprite.Group(tuple(self.enemies) + tuple(self.obstacles))
self.score = 0
self.end_time = 0
self.start_time = 0
self.time = (self.end_time-self.start_time) * 1000
def mainLoop(self):
"""
This is the main loop for the game that calls the other functions in this class
in order to create a start screen, run the game, and present the high score and player
score at the end of the game.
Param list: None
Return list: None
"""
self.done = False
while not self.done:
if self.currentState == "start":
self.startGame(self)
elif self.currentState == "running":
self.start_time = pygame.time.get_ticks()
self.runGame(self)
elif self.currentState == "end":
self.endGame(self)
pygame.quit
def startGame(self):
"""
This is the function for the start of the game. It fills the screen
with a different color background and creates the start button that the user
can click on to begin running the game.
Param list: None
Returns: None
"""
start = True
while start:
for event in pygame.event.get():
if event.type == pygame.QUIT:
self.done = True
start = False
if event.type == pygame.MOUSEBUTTONDOWN:
mouse_pos = pygame.mouse.get_pos()
if self.button.collidepoint(mouse_pos):
self.currentState = "running"
start = False
self.screen.fill((255, 0, 255))
pygame.draw.rect(self.screen, (0, 0, 0), self.button)
self.screen.blit(self.text, (350,50))
pygame.display.flip()
pygame.quit
def runGame(self):
run = True
clock = pygame.time.Clock
while run:
for event in pygame.event.get():
if event.type == pygame.QUIT:
self.done = True
run = False
if event.type == pygame.KEYDOWN:
#Under here is the game logic and i don't know if i should have the random enemy movement under here
if(event.key == pygame.K_UP):
self.Mycharacter.move_up()
elif(event.key == pygame.K_DOWN):
self.Mycharacter.move_down()
elif(event.key == pygame.K_LEFT):
self.Mycharacter.move_left()
elif(event.key == pygame.K_RIGHT):
self.Mycharacter.move_right()
self.score += 1
if self.score > 400:
if self.score > 800:
if self.score > 1200:
self.enemy.speed(18)
else:
self.enemy.speed(16)
else:
self.enemy.speed(14)
else:
self.enemy.speed(12)
self.mysprites.update()
#self.mysprites2.group_collide
#possibly sprite.groupcollide to save myself these two loops but I like the loops
#also idk if the dokill means it will .kill() or something else
for i in range(len(self.obstacles)):
if(pygame.sprite.collide_rect(self.Mycharacter, self.obstacle[i])):
self.Mycharacter.kill()
self.currentState = "end"
self.end_time = pygame.time.get_ticks()
run = False
for i in range(len(self.enemies)):
if(pygame.sprite.collide_rect(self.Mycharacter, self.enemies[i])):
self.Mycharacter.kill()
self.currentState = "end"
self.end_time = pygame.time.get_ticks()
run = False
self.screen.fill(GREEN)
#self.obstacles.draw(self.screen)
#self.enemies.draw(self.screen)
self.screen.blit(self.background, (0, 0))
self.mysprites.draw()
#self.screen.blit(self.Mycharacter,(self.Mycharacter.rect.x, self.Mycharacter.rect.y))
#drawing code
#update screen with what has been drawn
pygame.display.flip()
clock.tick(60)
pygame.quit
def endGame(self):
#self.screen = pygame.display.set_mode(800, 800)
#self.background = pygame.Surface(self.screen.get_size()).convert()
end = False
while not end:
for event in pygame.event.get():
if event == pygame.QUIT:
end = True
self.done = True
else:
line = json.load(self.file.readline())
num = line["one"]
self.file.close()
if self.time > int(num):
self.file = open("highscores.json", "w")
newstr = "highscore:"+str(num)
jsonstr = json.dump(newstr)
self.file.write(newstr)
self.file.close
self.file = open("highscores.json", "r")
newline = json.load(self.file.readline())
score = newline["highscore"]
self.file.close()
self.screen.fill((0, 0, 255))
#create text and rect to blit onto screen to display high score
self.screen.blit("Highscore: " + str(score), (350, 50))
self.screen.blit("Your Score: " + str(num), (350, 150))
pygame.display.flip()
pygame.quit
def main():
the_game = Controller()
the_game.mainLoop()
main()
它产生了这个错误：
from flask import Flask, redirect, render_template, request, url_for, send_file
from PIL import Image, ImageDraw
from io import BytesIO
app = Flask(__name__)
@app.route('/', methods=['GET', 'POST'])
def index():
if request.method == 'POST':
img = Image.open(request.files['file'].stream)
byte_io = BytesIO()
img.save(byte_io, 'PNG')
byte_io.seek(0)
return send_file(byte_io, mimetype='image/png')
我已尝试将TypeError: send_file() got an unexpected keyword argument 'mimetype'替换为其他有效参数，它只会给出相同的错误，但会显示新参数的名称。所以我认为问题在于mimetype。
更新：
要澄清一下，bytes_io我指的是内置的send_file()方法：
答案 0 :(得分：3)
mimetype猜测需要提供文件名或attachment_filename。
...
- mimetype - 文件的mimetype（如果提供）。如果给出了文件路径，则自动检测作为回退发生，否则将引发错误。
所以，你应该像这样提供
return send_file(io.BytesIO(obj.logo.read()),
attachment_filename='logo.png',
mimetype='image/png')
我已经更新了我的回答，
首先，下面的示例代码应该正常运行，
from flask import Flask
app = Flask(__name__)
@app.route('/get_image')
def get_image():
if request.args.get('type') == '1':
filename = 'ok.gif'
else:
filename = 'error.gif'
return send_file(filename)
if __name__ == '__main__':
app.run()
其次，如果您仍然遇到同样的错误，我认为您的环境＆＃39;问题。您可以使用pip freeze检查您的python包版本。