由于缺乏對我想使用的一些庫的支持,我將一些

Python開發從Windows轉移到Linux開發.我已經花了大部分時間搞亂了依賴關系.

問題

每當我拿起Linux,我通常會遇到一些依賴問題,通常是開發庫,無論是通過apt-get,easy_install或pip安裝.我可以浪費時間,應該是簡單的任務,花更長的時間讓圖書館工作,而不是編寫代碼.在哪里可以了解處理這些問題的策略,而不是為了遇到同樣問題的人而無緣無盡地搜索？

一個例子

所以,我發現在pypi的包,并認為使用這將使生活更輕松：

(我可能通過使用virtualenv來保持整潔,讓自己的生活變得更加困難.)

(myenv3)mat@ubuntu:~/myenv3$bin/pip install pyqrencode

Downloading/unpacking pyqrencode

Downloading pyqrencode-0.2.tar.gz

Running setup.py egg_info for package pyqrencode

Installing collected packages: pyqrencode

Running setup.py install for pyqrencode

building 'qrencode' extension

gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python2.7 -c qrencode.c -o build/temp.linux-i686-2.7/qrencode.o

gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-Bsymbolic-functions build/temp.linux-i686-2.7/qrencode.o -lqrencode -o build/lib.linux-i686-2.7/qrencode.so

Successfully installed pyqrencode

Cleaning up...

(我想我可能sudo apt-get安裝libqrencode-dev之前的某個時間點.)

所以我試圖運行測試腳本：

(myenv3)mat@ubuntu:~/myenv3$python test_qr.py

Traceback (most recent call last):

File "test_qr.py", line 1, in

from qrencode import Encoder

File "qrencode.pyx", line 1, in init qrencode (qrencode.c:1520)

ImportError: No module named ImageOps

🙁

那么,investigations透露,ImageOps似乎是PIL的一部分…

(myenv3)mat@ubuntu:~/myenv3$pip install pil

Downloading/unpacking pil

Downloading PIL-1.1.7.tar.gz (506Kb): 122Kb downloaded

Operation cancelled by user

Storing complete log in /home/mat/.pip/pip.log

(myenv3)mat@ubuntu:~/myenv3$bin/pip install pil

Downloading/unpacking pil

Downloading PIL-1.1.7.tar.gz (506Kb): 506Kb downloaded

Running setup.py egg_info for package pil

WARNING: '' not a valid package name; please use only.-separated package names in setup.py

Installing collected packages: pil

Running setup.py install for pil

WARNING: '' not a valid package name; please use only.-separated package names in setup.py

building '_imaging' extension

gcc ...

building '_imagingmath' extension

gcc ...

--------------------------------------------------------------------

PIL 1.1.7 SETUP SUMMARY

--------------------------------------------------------------------

version 1.1.7

platform linux2 2.7.1+ (r271:86832, Apr 11 2011, 18:05:24)

[GCC 4.5.2]

--------------------------------------------------------------------

*** TKINTER support not available

*** JPEG support not available

*** ZLIB (PNG/ZIP) support not available

*** FREETYPE2 support not available

*** LITTLECMS support not available

--------------------------------------------------------------------

To add a missing option, make sure you have the required

library, and set the corresponding ROOT variable in the

setup.py script.

To check the build, run the selftest.py script.

...

Successfully installed pil

Cleaning up...

嗯,PIL的安裝,但沒有拿起我安裝的庫sudo apt-get install libjpeg62 libjpeg62-dev libpng12-dev zlib1g zlib1g-dev之前.我不知道如何告訴pip將庫位置提供給setup.py. Googling建議我嘗試過各種各樣的ideas,但是似乎沒有一個可以幫助我,而不是把我送回來.

(myenv3)mat@ubuntu:~/myenv3$pip install pillow

Downloading/unpacking pillow

Downloading Pillow-1.7.5.zip (637Kb): 637Kb downloaded

Running setup.py egg_info for package pillow

...

Installing collected packages: pillow

Running setup.py install for pillow

building '_imaging' extension

gcc ...

--------------------------------------------------------------------

SETUP SUMMARY (Pillow 1.7.5 / PIL 1.1.7)

--------------------------------------------------------------------

version 1.7.5

platform linux2 2.7.1+ (r271:86832, Apr 11 2011, 18:05:24)

[GCC 4.5.2]

--------------------------------------------------------------------

*** TKINTER support not available

--- JPEG support available

--- ZLIB (PNG/ZIP) support available

--- FREETYPE2 support available

*** LITTLECMS support not available

--------------------------------------------------------------------

To add a missing option, make sure you have the required

library, and set the corresponding ROOT variable in the

setup.py script.

To check the build, run the selftest.py script.

...

Successfully installed pillow

Cleaning up...

嗯,我們似乎有JPEG和PNG支持這一次,呀！

(myenv3)mat@ubuntu:~/myenv3$python test_qr.py

Traceback (most recent call last):

File "test_qr.py", line 1, in

from qrencode import Encoder

File "qrencode.pyx", line 1, in init qrencode (qrencode.c:1520)

ImportError: No module named ImageOps

仍然沒有ImageOps雖然.現在我被困了,是ImageOps從枕頭丟失,還是一個不同的問題,也是在那里與pil.

總結

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