相关疑难解决方法(0)

TL; DR:我需要一种方法来解码使用(最好是纯粹的)Python的图像文件中的QR码.

我有一个带有QR码的jpg文件,我想用Python解码.我找到了几个声称这样做的图书馆:

PyQRCode(这里的网站)据说可以通过简单地提供这样的路径来解码图像中的qr代码:

import sys, qrcode
d = qrcode.Decoder()
if d.decode('out.png'):
    print 'result: ' + d.result
else:
    print 'error: ' + d.error

所以我只是使用它安装它sudo pip install pyqrcode.然而,我对上面的示例代码感到奇怪的是,它只导入qrcode(而不是导入pyqrcode)因为我认为qrcode引用这个只能生成 qr代码图像的库,这让我很困惑.所以,我想上面两个密码pyqrcode和qrcode,但双方未能在第二条线的说法AttributeError: 'module' object has no attribute 'Decoder'.此外,该网站是指Ubuntu 8.10(超过6年前推出),我找不到它的公共(git或其他)存储库来检查最新的提交.所以我转到了下一个图书馆:

ZBar(这里的网站)声称是,"an open source software suite for reading bar codes from various sources, such as image files." …

当我使用easy_install或buildout安装PIL时,它会以这种方式安装,我必须执行'import Image',而不是'来自PIL import Image'.

但是,如果我做"apt-get install python-imaging"或使用"pip -E test_pil install PIL",一切正常.

以下是我尝试使用virtualenv安装PIL的示例:

# virtualenv --no-site-packages test_pil
# test_pil/bin/easy_install PIL
# test_pil/bin/python
Python 2.5.1 (r251:54863, Feb  6 2009, 19:02:12) 
[GCC 4.0.1 (Apple Inc. build 5465)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import PIL
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named PIL

我明白了,easy_install将PIL打包到Egg中,而PIP则没有.与buildbot相同,它使用鸡蛋.

如何使用easy_install或buildout正确安装PIL？

我试图从得到样品heatmap.py运行: http://jjguy.com/heatmap/

#image.py
import heatmap
import random

if __name__ == "__main__":    
    pts = []
    for x in range(400):
        pts.append((random.random(), random.random() ))

    print "Processing %d points..." % len(pts)

    hm = heatmap.Heatmap()
    img = hm.heatmap(pts)
    img.save("classic.png")

我收到此错误:

Processing 400 points...
Traceback (most recent call last):
  File "/home/ec2usr/workspace/image/image.py", line 14, in <module>
    img.save("classic.png")
  File "/usr/local/lib/python2.7/dist-packages/PIL/Image.py", line 1437, in save
    save_handler(self, fp, filename)
  File "/usr/local/lib/python2.7/dist-packages/PIL/PngImagePlugin.py", line 572, in _save
    ImageFile._save(im, _idat(fp, chunk), [("zip", (0,0)+im.size, 0, rawmode)])
  File "/usr/local/lib/python2.7/dist-packages/PIL/ImageFile.py", line 481, in _save
    e = …

我在ubuntu上使用PIL通过virtualenv,安装了pip.我已将setup.py文件更改为指向解码器库.我在安装PIL时收到此消息:

PIL 1.1.7 SETUP SUMMARY

version       1.1.7
platform      linux2 2.6.7 (r267:88850, Aug 11 2011, 12:16:10)
              [GCC 4.6.1]

--- TKINTER support available
--- JPEG support available
--- ZLIB (PNG/ZIP) support available
--- FREETYPE2 support available
--- LITTLECMS support available

version       1.1.7
platform      linux2 2.6.7 (r267:88850, Aug 11 2011, 12:16:10)
              [GCC 4.6.1]

--- TKINTER support available
--- JPEG support available
--- ZLIB (PNG/ZIP) support available
--- FREETYPE2 support available
--- LITTLECMS support available

但是当我保存文件时,我仍然会收到"IOError:decoder jpeg not available"和"IOError:'decoder zip …

.gif我正在尝试使用 python从一组 PIL 图像创建动画。

这是我到目前为止所拥有的：

from images2gif import writeGif
from PIL import Image, ImageDraw
import os
import sys
import random
import argparse
import webbrowser

filename = ""

def makeimages():
    for z in range(1, 31):
        dims = (400, 400)  # size of image
        img = Image.new('RGB', dims)  # crete new image
        draw = ImageDraw.Draw(img)
        r = int(min(*dims)/100)
        print "Image img%d.png has been created" % z

        n = 1000

        for i in range(n):
            x, y = random.randint(0, dims[0]-r), random.randint(0, dims[1]-r)
            fill …

我安装了django-photologue.但是当我尝试在django admin中保存照片时,它会抛出此错误:

'解码器拉链不可用'

我已经卸载并重新安装了PIL.我希望有人可以帮助我完成如何克服这个错误的完整步骤.