From: R Bruce van Dover <r...@cornell.edu>
To: tutor@python.org
>Sent: Friday, June 29, 2012 6:33 PM
>Subject: [Tutor] libtiff--can't find library
>
>
>Presumably this is a newbie question; apologies in advance, but I have spent
>hours trying to RTFM, to no avail. Can anyone help?
>
>I've installed pylibtiff-0.1-svn.win32.exe since I want to be able
to read a TIFF file. But when I type (in IDLE) I get
>
>>>>fromlibtiff importTIFFfile,TIFFimage Traceback (most recent call last):
File "<pyshell#1>", line 1, in <module> from libtiff import TIFFfile,
TIFFimage File "E:\Python27\lib\site-packages\libtiff\__init__.py", line 4, in
<module>
from .libtiff import libtiff, TIFF
File "E:\Python27\lib\site-packages\libtiff\libtiff.py", line 35, in <module>
raise ImportError('Failed to find TIFF library. Make sure that libtiff is
installed and its location is listed in PATH|LD_LIBRARY_PATH|..')
ImportError: Failed to find TIFF library. Make sure that libtiff is installed
and its location is listed in PATH|LD_LIBRARY_PATH|..
>>> import sys
>>> print sys.path
['E:\\Python27\\Lib\\idlelib', 'E:\\Windows\\system32\\python27.zip',
'E:\\Python27\\DLLs', 'E:\\Python27\\lib', 'E:\\Python27\\lib\\plat-win',
'E:\\Python27\\lib\\lib-tk', 'E:\\Python27',
'E:\\Python27\\lib\\site-packages'] Libtiff is in the
'E:\\Python27\\lib\\site-packages' directory as it's supposed to. So is, e.g.,
Numpy, which imports just fine.
>
>What am I doing wrong? FWIW, I tried the PIL package, and had the
same problem (module not found). Why do these modules not import
when Numpy, matplotlib, scipy, etc. import as expected?
>
>Running Win7, 32bit, Python 2.7.1.
>
>===> Sounds likthe Python wrapper to the tiff library was installed, but the
>tiff library itself wasn't, or
your OS doesn't know where to look for it. Python uses ctypes to call C
functions in dll files from tifflib, but it can't call those if the dlls aren't
there or if %PATH% doesn't specify where they live. That's my theory about this
;-) Btw, I used WX Python to read tiff files before. Tiff is actually a family
of files and it turned out the WX Python could read bitonic (B/W) multipage
tiffs, but PIL couldn't. _______________________________________________
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