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我用django在背景上构建了一个web应用程序。当我启动服务器第一次加载页面时，它完美地工作并将图像保存到文件夹中。但问题是，当我点击浏览器的刷新按钮时，它停留在加载状态。我试图关闭服务器（ctrl + x）它关闭但我发现它在后台运行。重新启动服务器后，该应用程序第一次工作，但再次卡住加载，如果我点击刷新按钮。我希望如果我点击浏览器的刷新按钮，应用程序将从头开始运行。我不知道代码有什么问题。我是一个新的Django请给我暗示该怎么做。我的操作系统是linux并使用python 2.7。当点击重载页面时，Django页面停留在加载状态。
views.py的代码波纹管式给出： - 你的问题的
from django.http import HttpResponse
import numpy as np
import cv2
import Image
from PIL import Image
import ctypes
import os
import ImageDraw
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def index(request):
im_gray = cv2.imread('Rimage.jpg', cv2.CV_LOAD_IMAGE_GRAYSCALE)
(thresh, im_bw) = cv2.threshold(im_gray, 128, 255, cv2.THRESH_BINARY | cv2.THRESH_OTSU)
thresh = 100
im_bw = cv2.threshold(im_gray, thresh, 255, cv2.THRESH_BINARY)[1]
cv2.imwrite('bw_image.png', im_bw)
im = cv2.imread('bw_image.png')
gray = cv2.cvtColor(im,cv2.COLOR_BGR2GRAY)
blur = cv2.GaussianBlur(gray,(5,5),0)
thresh = cv2.adaptiveThreshold(blur,255,1,1,19,4)
contours,hierarchy = cv2.findContours(thresh,cv2.RETR_LIST,cv2.CHAIN_APPROX_SIMPLE)
h_list=[]
for cnt in contours:
[x,y,w,h] = cv2.boundingRect(cnt)
if w*h>250:
h_list.append([x,y,w,h])
ziped_list=zip(*h_list)
x_list=list(ziped_list[0])
dic=dict(zip(x_list,h_list))
x_list.sort()
i=0
for x in x_list:
[x,y,w,h]=dic[x]
im3=im[y:y+h,x:x+w]
cv2.imwrite('objects/pix%i.png'%i,im3)
i+=1
cv2.imwrite('objects/shhh.jpg',im)
key = cv2.waitKey(0)
im0 = cv2.imread('objects/pix0.png',0)
im1 = cv2.imread('objects/pix1.png',0)
im2 = cv2.imread('objects/pix2.png',0)
im3 = cv2.imread('objects/pix3.png',0)
im4 = cv2.imread('objects/pix4.png',0)
im5 = cv2.imread('objects/pix5.png',0)
h0, w0 = im0.shape[:2]
h1, w1 = im1.shape[:2]
h2, w2 = im2.shape[:2]
h3, w3 = im3.shape[:2]
h4, w4 = im4.shape[:2]
h5, w5 = im5.shape[:2]
maxh=max(h0,h1,h2,h3,h4,h5)
new = np.zeros((maxh,w0+w1+w2+w3+w4+w5+50),np.uint8)
new=(255-new)
new[maxh-h0:, :w0] = im0
new[maxh-h1:, w0+10:w0+w1+10] = im1
new[maxh-h2:, w0+w1+20:w0+w1+w2+20] = im2
new[maxh-h3:, w0+w1+w2+30:w0+w1+w2+w3+30] = im3
new[maxh-h4:, w0+w1+w2+w3+40:w0+w1+w2+w3+w4+40] = im4
new[maxh-h5:, w0+w1+w2+w3+w4+50:] = im5
gray = cv2.cvtColor(new, cv2.COLOR_GRAY2BGR)
cv2.imwrite('new_image.jpg',gray)
key = cv2.waitKey(0)
#resize image..........................................
im22 = Image.open("new_image.jpg")
img22 = im22.resize((157,57), Image.ANTIALIAS)
img22.save("new_image1.jpg", dpi=(1200,1200))
#image with white background...........................
img1 = Image.open("new_image1.jpg")
img2 = img1.crop((0,-34,600,566))
draw = ImageDraw.Draw(img2)
draw.rectangle((0,0,600,34), fill="white")
draw.rectangle((0,90,600,600), fill="white")
draw.rectangle((157,0,600,600), fill="white")
img2.save("img2.jpg","JPEG", quality=90)
#remove files.....................................................
os.remove('bw_image.png')
os.remove('img2.jpg')
os.remove('new_image.jpg')
os.remove('new_image1.jpg')
os.remove('objects/pix0.png')
os.remove('objects/pix1.png')
os.remove('objects/pix2.png')
os.remove('objects/pix3.png')
os.remove('objects/pix4.png')
os.remove('objects/pix5.png')
os.remove('objects/shhh.jpg')
#end..........................................................
return HttpResponse("Hello, world. You're at the polls index.")