mirror of
https://github.com/python/cpython.git
synced 2025-11-04 07:31:38 +00:00
47 lines
1.8 KiB
Python
47 lines
1.8 KiB
Python
"""Hook to allow easy access to site-specific modules.
|
|
|
|
Scripts or modules that need to use site-specific modules should place
|
|
|
|
import site
|
|
|
|
somewhere near the top of their code. This will append up to two
|
|
site-specific paths ($prefix/lib/site-python and
|
|
$exec_prefix/lib/site-python) to the module search path. ($prefix
|
|
and $exec_prefix are configuration parameters, and both default
|
|
to /usr/local; they are accessible in Python as sys.prefix and
|
|
sys.exec_prefix).
|
|
|
|
Because of Python's import semantics, it is okay for more than one
|
|
module to import site -- only the first one will execute the site
|
|
customizations. The directories are only appended to the path if they
|
|
exist and are not already on it.
|
|
|
|
Sites that wish to provide site-specific modules should place them in
|
|
one of the site specific directories; $prefix/lib/site-python is for
|
|
Python source code and $exec_prefix/lib/site-python is for dynamically
|
|
loadable extension modules (shared libraries).
|
|
|
|
After these path manipulations, an attempt is made to import a module
|
|
named sitecustomize, which can perform arbitrary site-specific
|
|
customizations. If this import fails with an ImportError exception,
|
|
it is ignored.
|
|
|
|
Note that for non-Unix systems, sys.prefix and sys.exec_prefix are
|
|
empty, and the path manipulations are skipped; however the import of
|
|
sitecustomize is still attempted.
|
|
|
|
XXX Any suggestions as to how to handle this for non-Unix systems???
|
|
"""
|
|
|
|
import sys, os
|
|
|
|
for prefix in sys.prefix, sys.exec_prefix:
|
|
if prefix:
|
|
sitedir = os.path.join(prefix, os.path.join("lib", "site-python"))
|
|
if sitedir not in sys.path and os.path.isdir(sitedir):
|
|
sys.path.append(sitedir) # Add path component
|
|
|
|
try:
|
|
import sitecustomize # Run arbitrary site specific code
|
|
except ImportError:
|
|
pass # No site customization module
|