google app engine - GAE Python - Displaying images -


i'm trying display multiple images code doesn't work. (it displays first image). wrong code?

import jinja2 import re import webapp2 import os import cgi google.appengine.ext import db google.appengine.api import mail google.appengine.api import images import hashlib import urllib import urllib2 import logging import time import datetime import random random import randint  class user(db.model):     name = db.stringproperty()     photo = db.blobproperty() class mainhandler(webapp2.requesthandler):     def get(self):         self.response.out.write("""           <form enctype="multipart/form-data" method="post">             <input name="user">         <input type="file" name="img"/>         <input type="submit">           </form>       """)     def post(self):         a=user()         avatar = images.resize(self.request.get('img'), 320, 320)         a.name = self.request.get('user')         a.photo = db.blob(avatar)         a.put() class display(webapp2.requesthandler):     def get(self):         x=db.gqlquery("select * user")         x in x:             self.response.headers['content-type'] = 'image/png'             self.response.out.write(x.photo) app = webapp2.wsgiapplication([     ('/', mainhandler),     ('/display', display) ], debug=true)

i'm trying display multiple images code doesn't work. (it displays first image). wrong code? thank in advance.

i don't believe web browser parse multiple mime headers. doesn't make sense in context of web result. need output html document instead <img /> links images. images can pulled database using script outputs single image (perhaps based on record id) it's better cache them statically somewhere when they're updated don't have connect database every time want show image.


Comments

Post a Comment

Popular posts from this blog

python - How to create a legend for 3D bar in matplotlib? -

Image
given ax = plt.subplot() : ax.bar()[0] can passed plt.legend() . however, ax.bar3d() returns none . how create legend displayed bars? update: passing legend="stuff" ax.bar3d() , calling ax.legend() raises /usr/lib/python2.6/site-packages/matplotlib/axes.py:4368: userwarning: no labeled objects found. use label='...' kwarg on individual plots. warnings.warn("no labeled objects found. " you need use proxy artist legends not supported. this code: from mpl_toolkits.mplot3d import axes3d import matplotlib.pyplot plt import numpy np fig = plt.figure() ax = fig.add_subplot(111, projection='3d') x, y = np.random.rand(2, 100) * 4 hist, xedges, yedges = np.histogram2d(x, y, bins=4) elements = (len(xedges) - 1) * (len(yedges) - 1) xpos, ypos = np.meshgrid(xedges[:-1]+0.25, yedges[:-1]+0.25) xpos = xpos.flatten() ypos = ypos.flatten() zpos = np.zeros(elements) dx = 0.5 * np.ones_like(zpos) dy = dx.copy() dz = hist.flatten() ax...
Read more

java - Multi-Label Document Classification -

i have database in store data based upon following 3 fields: id, text, {labels}. note each text has been assigned more 1 label \ tag \ class. want build model (weka \ rapidminer \ mahout) able recommend \ classify bunch of labels \ tags \ classes given text. i have heard svm , naive bayes classifier, not sure whether support multi-label classification or not. guides me right direction more welcome! the basic multilabel classification method one-vs.-the-rest (ovr), called binary relevance (br). basic idea take off-the-shelf binary classifier, such naive bayes or svm, create k instances of solve k independent classification problems. in python-like pseudocode: for each class k: learner = svm(settings) # example labels = [class_of(x) == k x in samples] learner.learn(samples, labels) then @ prediction time, run each of binary classifiers on sample , collect labels predict positive. (both training , prediction can done in parallel, since problems assumed ...
Read more

php - Dynamic url re-writing using htaccess -

how can rewrite http://mydomain.com/test/master.php?catid=2&subcatid=8 http://mydomain.com/test/master.php/catname/subcat using .htaccess file. once rewritten, how can access these parameters in master.php? note: untested, let me know if doesn't work. rewriterule ^master.php/([a-za-z0-9_-]+)/([a-za-z0-9_-]+)$ /master.php?catid$1&subcatid=$2 [l]
Read more