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site.here on python 2.4

greetings. it seems that the attribute site.here, of the site module,
has vanished in python 2.4. up until python 2.3, site.here seemed (to
me at least) a convenient way to get the complete path to the python
library on any platform:
import site

'/System/Library/Frameworks/Python.framewor k/Versions/2.3/lib/python2.3'

i do not see any information about this change save that in the new
documentation it says:

This module is automatically imported during initialization. The
automatic import can be suppressed using the interpreter's -S option.

Importing this module will append site-specific paths to the module
search path.

can anyone propose a similarly effective and cross-platform solution
for easily discovering the the library path on any python installation?

Jul 18 '05 #1
2 1527
"ariza" <ar***@flexaton e.com> wrote:

greetings. it seems that the attribute site.here, of the site module,
has vanished in python 2.4. up until python 2.3, site.here seemed (to
me at least) a convenient way to get the complete path to the python
library on any platform.
"here" was a temporary variable used to get the exact location of
the LICENSE file. in Python 2.4, that code has been moved into
a function, in which "here" is still a temporary variable.

was it documented somewhere else?
can anyone propose a similarly effective and cross-platform solution
for easily discovering the the library path on any python installation?

the library path is defined by the sys.path variable, which contains a list
of library directories.

sys.prefix gives you the installation root, sys.executable tells you where
the interpreter is.

if you need the exact behaviour of "site.here" , you can do

import os
here = os.path.dirname (os.__file__)

but I don't really see why your program should have to care about
anything but the path...


Jul 18 '05 #2

i am not sure where i found site.here documented as used prior to 2.4.

the issue is that i do not need sys.path, as in the list of all paths
that python searches. sys.prefix is close to what i need:
sys.prefix '/System/Library/Frameworks/Python.framewor k/Versions/2.3'

but the old site.here gave sys.prefix, plus the additional directories
to get into the actual python library:
site.here '/System/Library/Frameworks/Python.framewor k/Versions/2.3/lib/python2.3'

can we assume that, on all platforms, the old site.here is the same as:
os.path.join(sy s.prefix, 'lib', 'python%s' % sys.version[:3]) '/System/Library/Frameworks/Python.framewor k/Versions/2.3/lib/python2.3'

or is it better to use, as you suggest,
import os
os.path.dirname (os.__file__)

'/System/Library/Frameworks/Python.framewor k/Versions/2.3/lib/python2.3'

this is useful for a few reasons. the first was i needed a cross
platform way to find the complete path to the idle directory; the
second was the complete path to the 'site-packages' directory.


Jul 18 '05 #3

This thread has been closed and replies have been disabled. Please start a new discussion.

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