New submission from Terry J. Reedy:

Update tix install info in doc.  "Using tix" starts with 3 lines for testing 
one's tix install and continues 

'''If this fails, you have a Tk installation problem which must be resolved 
before proceeding. Use the environment variable TIX_LIBRARY to point to the 
installed Tix library directory, and make sure you have the dynamic object 
library (tix8183.dll or libtix8183.so) in the same directory that contains your 
Tk dynamic object library (tk8183.dll or libtk8183.so). The directory with the 
dynamic object library should also have a file called pkgIndex.tcl (case 
sensitive), which contains the line: package ifneeded Tix 8.1 [list load "[file 
join $dir tix8183.dll]" Tix]'''

Almost nothing above matches my working-with-tix 3.4.2 Win 7 install.  I do 
have a tix library directory: python34/tcl/tix8.4.3, but the version number is 
much newer.  Since it is in the right place, TIX_LIBRARY is not needed and 
there is none.  python34/DLLs contains tcl86t.dll and tk86t.dll and NO 
tix####.dll.  Is the once separate tix dll now part of tk dll?  I cannot find 
pkgIndex.tcl; it is certainly not in the DLLs directory nor in the /tcl.

The current doc seems useless to people who do not have tix working.  See, for 
example,
https://stackoverflow.com/questions/27751923/tix-widgets-installation-issue
which is a semi-repeat question and which claims seeing similar reports 
elsewhere on the net.

----------
assignee: docs@python
components: Documentation, Tkinter
messages: 233368
nosy: docs@python, serhiy.storchaka, terry.reedy, zach.ware
priority: normal
severity: normal
stage: needs patch
status: open
title: Update tix install information in tkinter tix chapter of doc
type: behavior
versions: Python 2.7, Python 3.4, Python 3.5

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<http://bugs.python.org/issue23156>
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