"""Append module search paths for third-party packages to sys.path.

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****************************************************************

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* This module is automatically imported during initialization. *

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****************************************************************

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In earlier versions of Python (up to 1.5a3), scripts or modules that

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needed to use site-specific modules would place ``import site''

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somewhere near the top of their code. Because of the automatic

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import, this is no longer necessary (but code that does it still

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works).

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This will append site-specific paths to the module search path. On

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Unix (including Mac OSX), it starts with sys.prefix and

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sys.exec_prefix (if different) and appends

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lib/python<version>/site-packages as well as lib/site-python.

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On other platforms (such as Windows), it tries each of the

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prefixes directly, as well as with lib/site-packages appended. The

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resulting directories, if they exist, are appended to sys.path, and

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also inspected for path configuration files.

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A path configuration file is a file whose name has the form

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<package>.pth; its contents are additional directories (one per line)

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to be added to sys.path. Non-existing directories (or

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non-directories) are never added to sys.path; no directory is added to

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sys.path more than once. Blank lines and lines beginning with

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'#' are skipped. Lines starting with 'import' are executed.

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For example, suppose sys.prefix and sys.exec_prefix are set to

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/usr/local and there is a directory /usr/local/lib/python2.5/site-packages

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with three subdirectories, foo, bar and spam, and two path

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configuration files, foo.pth and bar.pth. Assume foo.pth contains the

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following:

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# foo package configuration

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foo

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bar

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bletch

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and bar.pth contains:

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# bar package configuration

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bar

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Then the following directories are added to sys.path, in this order:

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/usr/local/lib/python2.5/site-packages/bar

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/usr/local/lib/python2.5/site-packages/foo

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Note that bletch is omitted because it doesn't exist; bar precedes foo

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because bar.pth comes alphabetically before foo.pth; and spam is

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omitted because it is not mentioned in either path configuration file.

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After these path manipulations, an attempt is made to import a module

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named sitecustomize, which can perform arbitrary additional

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site-specific customizations. If this import fails with an

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ImportError exception, it is silently ignored.

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"""

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import sys

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import os

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import __builtin__

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import traceback

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# Prefixes for site-packages; add additional prefixes like /usr/local here

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PREFIXES = [sys.prefix, sys.exec_prefix]

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# Enable per user site-packages directory

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# set it to False to disable the feature or True to force the feature

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ENABLE_USER_SITE = None

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# for distutils.commands.install

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# These values are initialized by the getuserbase() and getusersitepackages()

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# functions, through the main() function when Python starts.

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USER_SITE = None

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USER_BASE = None

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def makepath(*paths):

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dir = os.path.join(*paths)

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try:

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dir = os.path.abspath(dir)

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except OSError:

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pass

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return dir, os.path.normcase(dir)

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def abs__file__():

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"""Set all module' __file__ attribute to an absolute path"""

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for m in sys.modules.values():

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if hasattr(m, '__loader__'):

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continue # don't mess with a PEP 302-supplied __file__

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try:

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m.__file__ = os.path.abspath(m.__file__)

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except (AttributeError, OSError):

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pass

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def removeduppaths():

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""" Remove duplicate entries from sys.path along with making them

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absolute"""

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# This ensures that the initial path provided by the interpreter contains

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# only absolute pathnames, even if we're running from the build directory.

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L = []

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known_paths = set()

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for dir in sys.path:

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# Filter out duplicate paths (on case-insensitive file systems also

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# if they only differ in case); turn relative paths into absolute

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# paths.

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dir, dircase = makepath(dir)

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if not dircase in known_paths:

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L.append(dir)

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known_paths.add(dircase)

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sys.path[:] = L

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return known_paths

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def _init_pathinfo():

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"""Return a set containing all existing directory entries from sys.path"""

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d = set()

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for dir in sys.path:

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try:

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if os.path.isdir(dir):

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dir, dircase = makepath(dir)

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d.add(dircase)

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except TypeError:

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continue

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return d

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def addpackage(sitedir, name, known_paths):

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"""Process a .pth file within the site-packages directory:

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For each line in the file, either combine it with sitedir to a path

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and add that to known_paths, or execute it if it starts with 'import '.

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"""

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if known_paths is None:

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_init_pathinfo()

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reset = 1

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else:

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reset = 0

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fullname = os.path.join(sitedir, name)

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try:

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f = open(fullname, "rU")

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except IOError:

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return

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with f:

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for n, line in enumerate(f):

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if line.startswith("#"):

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continue

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try:

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if line.startswith(("import ", "import\t")):

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exec line

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continue

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line = line.rstrip()

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dir, dircase = makepath(sitedir, line)

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if not dircase in known_paths and os.path.exists(dir):

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sys.path.append(dir)

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known_paths.add(dircase)

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except Exception as err:

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print >>sys.stderr, "Error processing line {:d} of {}:\n".format(

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n+1, fullname)

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for record in traceback.format_exception(*sys.exc_info()):

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for line in record.splitlines():

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print >>sys.stderr, ' '+line

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print >>sys.stderr, "\nRemainder of file ignored"

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break

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if reset:

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known_paths = None

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return known_paths

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def addsitedir(sitedir, known_paths=None):

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"""Add 'sitedir' argument to sys.path if missing and handle .pth files in

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'sitedir'"""

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if known_paths is None:

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known_paths = _init_pathinfo()

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reset = 1

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else:

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reset = 0

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sitedir, sitedircase = makepath(sitedir)

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if not sitedircase in known_paths:

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sys.path.append(sitedir) # Add path component

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try:

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names = os.listdir(sitedir)

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except os.error:

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return

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dotpth = os.extsep + "pth"

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names = [name for name in names if name.endswith(dotpth)]

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for name in sorted(names):

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addpackage(sitedir, name, known_paths)

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if reset:

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known_paths = None

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return known_paths

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def check_enableusersite():

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"""Check if user site directory is safe for inclusion

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The function tests for the command line flag (including environment var),

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process uid/gid equal to effective uid/gid.

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None: Disabled for security reasons

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False: Disabled by user (command line option)

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True: Safe and enabled

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"""

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if sys.flags.no_user_site:

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return False

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if hasattr(os, "getuid") and hasattr(os, "geteuid"):

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# check process uid == effective uid

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if os.geteuid() != os.getuid():

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return None

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if hasattr(os, "getgid") and hasattr(os, "getegid"):

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# check process gid == effective gid

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if os.getegid() != os.getgid():

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return None

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return True

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def getuserbase():

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"""Returns the `user base` directory path.

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The `user base` directory can be used to store data. If the global

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variable ``USER_BASE`` is not initialized yet, this function will also set

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it.

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"""

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global USER_BASE

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if USER_BASE is not None:

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return USER_BASE

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from sysconfig import get_config_var

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USER_BASE = get_config_var('userbase')

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return USER_BASE

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def getusersitepackages():

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"""Returns the user-specific site-packages directory path.

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If the global variable ``USER_SITE`` is not initialized yet, this

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function will also set it.

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"""

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global USER_SITE

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user_base = getuserbase() # this will also set USER_BASE

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if USER_SITE is not None:

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return USER_SITE

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from sysconfig import get_path

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import os

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if sys.platform == 'darwin':

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from sysconfig import get_config_var

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if get_config_var('PYTHONFRAMEWORK'):

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USER_SITE = get_path('purelib', 'osx_framework_user')

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return USER_SITE

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USER_SITE = get_path('purelib', '%s_user' % os.name)

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return USER_SITE

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def addusersitepackages(known_paths):

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"""Add a per user site-package to sys.path

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Each user has its own python directory with site-packages in the

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home directory.

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"""

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# get the per user site-package path

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# this call will also make sure USER_BASE and USER_SITE are set

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user_site = getusersitepackages()

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if ENABLE_USER_SITE and os.path.isdir(user_site):

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addsitedir(user_site, known_paths)

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return known_paths

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def getsitepackages():

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"""Returns a list containing all global site-packages directories

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(and possibly site-python).

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For each directory present in the global ``PREFIXES``, this function

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will find its `site-packages` subdirectory depending on the system

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environment, and will return a list of full paths.

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"""

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sitepackages = []

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seen = set()

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for prefix in PREFIXES:

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if not prefix or prefix in seen:

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continue

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seen.add(prefix)

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if sys.platform in ('os2emx', 'riscos'):

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sitepackages.append(os.path.join(prefix, "Lib", "site-packages"))

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elif os.sep == '/':

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sitepackages.append(os.path.join(prefix, "lib64",

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"python" + sys.version[:3],

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"site-packages"))

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sitepackages.append(os.path.join(prefix, "lib",

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"python" + sys.version[:3],

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"site-packages"))

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sitepackages.append(os.path.join(prefix, "lib", "site-python"))

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else:

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sitepackages.append(prefix)

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sitepackages.append(os.path.join(prefix, "lib64", "site-packages"))

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sitepackages.append(os.path.join(prefix, "lib", "site-packages"))

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return sitepackages

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def addsitepackages(known_paths):

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"""Add site-packages (and possibly site-python) to sys.path"""

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for sitedir in getsitepackages():

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if os.path.isdir(sitedir):

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addsitedir(sitedir, known_paths)

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return known_paths

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def setBEGINLIBPATH():

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"""The OS/2 EMX port has optional extension modules that do double duty

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as DLLs (and must use the .DLL file extension) for other extensions.

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The library search path needs to be amended so these will be found

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during module import. Use BEGINLIBPATH so that these are at the start

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of the library search path.

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"""

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dllpath = os.path.join(sys.prefix, "Lib", "lib-dynload")

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libpath = os.environ['BEGINLIBPATH'].split(';')

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if libpath[-1]:

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libpath.append(dllpath)

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else:

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libpath[-1] = dllpath

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os.environ['BEGINLIBPATH'] = ';'.join(libpath)

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def setquit():

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"""Define new builtins 'quit' and 'exit'.

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These are objects which make the interpreter exit when called.

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The repr of each object contains a hint at how it works.

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"""

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if os.sep == ':':

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eof = 'Cmd-Q'

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elif os.sep == '\\':

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eof = 'Ctrl-Z plus Return'

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else:

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eof = 'Ctrl-D (i.e. EOF)'

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class Quitter(object):

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def __init__(self, name):

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self.name = name

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def __repr__(self):

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return 'Use %s() or %s to exit' % (self.name, eof)

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def __call__(self, code=None):

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# Shells like IDLE catch the SystemExit, but listen when their

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# stdin wrapper is closed.

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try:

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sys.stdin.close()

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except:

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pass

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raise SystemExit(code)

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__builtin__.quit = Quitter('quit')

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__builtin__.exit = Quitter('exit')

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[358] Fix | Delete

class _Printer(object):

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"""interactive prompt objects for printing the license text, a list of

[360] Fix | Delete

contributors and the copyright notice."""

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[362] Fix | Delete

MAXLINES = 23

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[364] Fix | Delete

def __init__(self, name, data, files=(), dirs=()):

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self.__name = name

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self.__data = data

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self.__files = files

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self.__dirs = dirs

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self.__lines = None

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[371] Fix | Delete

def __setup(self):

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if self.__lines:

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return

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data = None

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for dir in self.__dirs:

[376] Fix | Delete

for filename in self.__files:

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filename = os.path.join(dir, filename)

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try:

[379] Fix | Delete

fp = file(filename, "rU")

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data = fp.read()

[381] Fix | Delete

fp.close()

[382] Fix | Delete

break

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except IOError:

[384] Fix | Delete

pass

[385] Fix | Delete

if data:

[386] Fix | Delete

break

[387] Fix | Delete

if not data:

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data = self.__data

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self.__lines = data.split('\n')

[390] Fix | Delete

self.__linecnt = len(self.__lines)

[391] Fix | Delete

[392] Fix | Delete

def __repr__(self):

[393] Fix | Delete

self.__setup()

[394] Fix | Delete

if len(self.__lines) <= self.MAXLINES:

[395] Fix | Delete

return "\n".join(self.__lines)

[396] Fix | Delete

else:

[397] Fix | Delete

return "Type %s() to see the full %s text" % ((self.__name,)*2)

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[399] Fix | Delete

def __call__(self):

[400] Fix | Delete

self.__setup()

[401] Fix | Delete

prompt = 'Hit Return for more, or q (and Return) to quit: '

[402] Fix | Delete

lineno = 0

[403] Fix | Delete

while 1:

[404] Fix | Delete

try:

[405] Fix | Delete

for i in range(lineno, lineno + self.MAXLINES):

[406] Fix | Delete

print self.__lines[i]

[407] Fix | Delete

except IndexError:

[408] Fix | Delete

break

[409] Fix | Delete

else:

[410] Fix | Delete

lineno += self.MAXLINES

[411] Fix | Delete

key = None

[412] Fix | Delete

while key is None:

[413] Fix | Delete

key = raw_input(prompt)

[414] Fix | Delete

if key not in ('', 'q'):

[415] Fix | Delete

key = None

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if key == 'q':

[417] Fix | Delete

break

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[419] Fix | Delete

def setcopyright():

[420] Fix | Delete

"""Set 'copyright' and 'credits' in __builtin__"""

[421] Fix | Delete

__builtin__.copyright = _Printer("copyright", sys.copyright)

[422] Fix | Delete

if sys.platform[:4] == 'java':

[423] Fix | Delete

__builtin__.credits = _Printer(

[424] Fix | Delete

"credits",

[425] Fix | Delete

"Jython is maintained by the Jython developers (www.jython.org).")

[426] Fix | Delete

else:

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__builtin__.credits = _Printer("credits", """\

[428] Fix | Delete

Thanks to CWI, CNRI, BeOpen.com, Zope Corporation and a cast of thousands

[429] Fix | Delete

for supporting Python development. See www.python.org for more information.""")

[430] Fix | Delete

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

[431] Fix | Delete

__builtin__.license = _Printer(

[432] Fix | Delete

"license", "See https://www.python.org/psf/license/",

[433] Fix | Delete

["LICENSE.txt", "LICENSE"],

[434] Fix | Delete

[os.path.join(here, os.pardir), here, os.curdir])

[435] Fix | Delete

[436] Fix | Delete

[437] Fix | Delete

class _Helper(object):

[438] Fix | Delete

"""Define the builtin 'help'.

[439] Fix | Delete

This is a wrapper around pydoc.help (with a twist).

[440] Fix | Delete

[441] Fix | Delete

"""

[442] Fix | Delete

[443] Fix | Delete

def __repr__(self):

[444] Fix | Delete

return "Type help() for interactive help, " \

[445] Fix | Delete

"or help(object) for help about object."

[446] Fix | Delete

def __call__(self, *args, **kwds):

[447] Fix | Delete

import pydoc

[448] Fix | Delete

return pydoc.help(*args, **kwds)

[449] Fix | Delete

[450] Fix | Delete

def sethelper():

[451] Fix | Delete

__builtin__.help = _Helper()

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[453] Fix | Delete

def aliasmbcs():

[454] Fix | Delete

"""On Windows, some default encodings are not provided by Python,

[455] Fix | Delete

while they are always available as "mbcs" in each locale. Make

[456] Fix | Delete

them usable by aliasing to "mbcs" in such a case."""

[457] Fix | Delete

if sys.platform == 'win32':

[458] Fix | Delete

import locale, codecs

[459] Fix | Delete

enc = locale.getdefaultlocale()[1]

[460] Fix | Delete

if enc.startswith('cp'): # "cp***" ?

[461] Fix | Delete

try:

[462] Fix | Delete

codecs.lookup(enc)

[463] Fix | Delete

except LookupError:

[464] Fix | Delete

import encodings

[465] Fix | Delete

encodings._cache[enc] = encodings._unknown

[466] Fix | Delete

encodings.aliases.aliases[enc] = 'mbcs'

[467] Fix | Delete

[468] Fix | Delete

def setencoding():

[469] Fix | Delete

"""Set the string encoding used by the Unicode implementation. The

[470] Fix | Delete

default is 'ascii', but if you're willing to experiment, you can

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change this."""

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encoding = "ascii" # Default value set by _PyUnicode_Init()

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if 0:

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# Enable to support locale aware default string encodings.

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import locale

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loc = locale.getdefaultlocale()

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if loc[1]:

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encoding = loc[1]

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if 0:

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# Enable to switch off string to Unicode coercion and implicit

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# Unicode to string conversion.

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encoding = "undefined"

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if encoding != "ascii":

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# On Non-Unicode builds this will raise an AttributeError...

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sys.setdefaultencoding(encoding) # Needs Python Unicode build !

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def execsitecustomize():

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"""Run custom site specific code, if available."""

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try:

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import sitecustomize

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except ImportError:

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pass

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except Exception:

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if sys.flags.verbose:

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sys.excepthook(*sys.exc_info())

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else:

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print >>sys.stderr, \

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