IOError: 解码器 zip 不可用" : Ubuntu Python PIL

Question

我正在尝试运行这个示例代码 heatmap.py，地址是：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")

但是我遇到了这个错误：

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 = Image._getencoder(im.mode, e, a, im.encoderconfig)
  File "/usr/local/lib/python2.7/dist-packages/PIL/Image.py", line 399, in _getencoder
    raise IOError("encoder %s not available" % encoder_name)
IOError: encoder zip not available

我是在 Ubuntu 12（64位）系统上用 Eclipse 工作，使用的是 Python 2.7。

我在 /usr/lib 和 /usr/lib/x86_64-linux-gnu/ 这两个地方都找到了 libz.so，没问题。可是我已经尝试了以下解决方案，但都没有效果：

PIL 说它有“可用支持”，但在保存文件时仍然出现 IOError

关于 PIL 错误 -- IOError: 解码器 zip 不可用

IOError: “解码器 zip 不可用”，在 Linux 上使用 matplotlib PNG 在 ReportLab 中，Windows 上可以工作

http://www.foxhop.net/ubuntu-python-easy_install-pil-does-not-install-zlib-support

我为这个问题烦恼了好几天，非常感谢任何人的帮助！

来自 python-imaging 的安装日志：

ubuntu@ip-10-241-17-21:/usr/lib$ sudo apt-get install python-imaging
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  account-plugin-identica account-plugin-twitter gir1.2-messagingmenu-1.0
  hplip-data libgtkspell-3-0 libqt4-designer libqt4-help libqt4-scripttools
  libqt4-svg libqt4-test libqtassistantclient4 libsane-hpaio
  linux-headers-3.5.0-21 linux-headers-3.5.0-21-generic python-debtagshw
  python-lxml python-pexpect python-piston-mini-client python-qt4
  python-renderpm python-reportlab python-reportlab-accel python-sip
  software-center-aptdaemon-plugins ubuntu-extras-keyring
Use 'apt-get autoremove' to remove them.
Suggested packages:
  python-imaging-doc python-imaging-dbg
The following NEW packages will be installed:
  python-imaging
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/294 kB of archives.
After this operation, 996 kB of additional disk space will be used.
Selecting previously unselected package python-imaging.
(Reading database ... 189302 files and directories currently installed.)
Unpacking python-imaging (from .../python-imaging_1.1.7-4build1_amd64.deb) ...
Setting up python-imaging (1.1.7-4build1) ...
ubuntu@ip-10-241-17-21:/usr/lib$

安装日志（从 Imaging 运行 python install setup.py）：

PIL 1.1.7 SETUP SUMMARY
--------------------------------------------------------------------
version       1.1.7
platform      linux2 2.7.3 (default, Sep 26 2012, 21:51:14)
              [GCC 4.7.2]
--------------------------------------------------------------------
--- TKINTER support available
*** JPEG support not available
--- ZLIB (PNG/ZIP) support available
*** FREETYPE2 support not available
*** LITTLECMS support not available

selftest.py：

--------------------------------------------------------------------
PIL 1.1.7 TEST SUMMARY
--------------------------------------------------------------------
Python modules loaded from ./PIL
Binary modules loaded from /usr/local/lib/python2.7/dist-packages
--------------------------------------------------------------------
*** PIL CORE support not installed
*** TKINTER support not installed
--- JPEG support ok
--- ZLIB (PNG/ZIP) support ok
*** FREETYPE2 support not installed
*** LITTLECMS support not installed
--------------------------------------------------------------------

Linux ubuntu eclipse matplotlib PIL IOError imaging library zip decoder

IOError: 解码器 zip 不可用" : Ubuntu Python PIL

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