python - "IOError: decoder zip not available": Ubuntu Python PIL

Question

我正在尝试从以下位置运行示例 heatmap.py: 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")

我得到这个错误:

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

使用 Python 2.7 在 Ubuntu 12(64 位)系统上运行 Eclipse。

我在/usr/lib 和/usr/lib/x86_64-linux-gnu/中都找到了 libz.so 就好了。我已经尝试过这些解决方案，但没有结果:

PIL says it has "support available" but still gives IOError when saving files

About the PIL Error -- IOError: decoder zip not available

IOError: "decoder zip not available" using matplotlib PNG in ReportLab on Linux, works on Windows

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

我已经为此苦恼了几天，非常感谢任何人的帮助!

从 python-imaging 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(来自 Imaging 的 python 安装 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

自测.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
--------------------------------------------------------------------

Answer 1

我刚刚遇到了由同时安装 PIL(通过 python pip 安装程序安装)和通过 apt-get 安装的 python-imaging 包引起的类似问题。当我从 pip 中删除额外版本时，它为我解决了。

如果您从源代码或使用 pip 安装了 PIL，那么您可能会遇到同样的问题。

当我构建 PIL 时，我还发现我必须将库链接到/usr/lib。这可能会解决上面日志中不支持的消息。

sudo ln -s /usr/lib/x86_64-linux-gnu/libjpeg.so /usr/lib
sudo ln -s /usr/lib/x86_64-linux-gnu/libfreetype.so /usr/lib
sudo ln -s /usr/lib/x86_64-linux-gnu/libz.so /usr/lib