"""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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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.

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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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If a file named "pyvenv.cfg" exists one directory above sys.executable,

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sys.prefix and sys.exec_prefix are set to that directory and

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it is also checked for site-packages (sys.base_prefix and

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sys.base_exec_prefix will always be the "real" prefixes of the Python

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installation). If "pyvenv.cfg" (a bootstrap configuration file) contains

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the key "include-system-site-packages" set to anything other than "false"

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(case-insensitive), the system-level prefixes will still also be

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searched for site-packages; otherwise they won't.

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All of the resulting site-specific directories, if they exist, are

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appended to sys.path, and also inspected for path configuration

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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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The readline module is also automatically configured to enable

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completion for systems that support it. This can be overridden in

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sitecustomize, usercustomize or PYTHONSTARTUP. Starting Python in

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isolated mode (-I) disables automatic readline configuration.

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After these operations, 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 builtins

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import _sitebuiltins

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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_paths():

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"""Set all module __file__ and __cached__ attributes to an absolute path"""

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for m in set(sys.modules.values()):

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if (getattr(getattr(m, '__loader__', None), '__module__', None) not in

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('_frozen_importlib', '_frozen_importlib_external')):

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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, TypeError):

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pass

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try:

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

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except (AttributeError, OSError, TypeError):

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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 file system items from sys.path."""

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d = set()

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for item in sys.path:

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try:

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if os.path.exists(item):

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_, itemcase = makepath(item)

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d.add(itemcase)

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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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known_paths = _init_pathinfo()

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reset = True

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else:

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reset = False

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

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try:

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f = open(fullname, "r")

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except OSError:

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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:

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print("Error processing line {:d} of {}:\n".format(n+1, fullname),

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file=sys.stderr)

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import traceback

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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(' '+line, file=sys.stderr)

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print("\nRemainder of file ignored", file=sys.stderr)

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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 = True

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else:

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reset = False

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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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known_paths.add(sitedircase)

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try:

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names = os.listdir(sitedir)

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except OSError:

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return

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

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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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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(prefixes=None):

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

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For each directory present in ``prefixes`` (or the global ``PREFIXES``),

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this function will find its `site-packages` subdirectory depending on the

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system 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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if prefixes is None:

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prefixes = PREFIXES

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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 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%d.%d" % sys.version_info[:2],

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"site-packages"))

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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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if sys.platform == "darwin":

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# for framework builds *only* we add the standard Apple

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# locations.

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from sysconfig import get_config_var

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framework = get_config_var("PYTHONFRAMEWORK")

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if framework:

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sitepackages.append(

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os.path.join("/Library", framework,

[323] Fix | Delete

'%d.%d' % sys.version_info[:2], "site-packages"))

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return sitepackages

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def addsitepackages(known_paths, prefixes=None):

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"""Add site-packages to sys.path

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'/usr/local' is included in PREFIXES if RPM build is not detected

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to make packages installed into this location visible.

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[332] Fix | Delete

"""

[333] Fix | Delete

if ENABLE_USER_SITE and 'RPM_BUILD_ROOT' not in os.environ:

[334] Fix | Delete

PREFIXES.insert(0, "/usr/local")

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for sitedir in getsitepackages(prefixes):

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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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[341] Fix | Delete

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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"""

[348] Fix | Delete

if os.sep == '\\':

[349] Fix | Delete

eof = 'Ctrl-Z plus Return'

[350] Fix | Delete

else:

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

[352] Fix | Delete

[353] Fix | Delete

builtins.quit = _sitebuiltins.Quitter('quit', eof)

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builtins.exit = _sitebuiltins.Quitter('exit', eof)

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def setcopyright():

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"""Set 'copyright' and 'credits' in builtins"""

[359] Fix | Delete

builtins.copyright = _sitebuiltins._Printer("copyright", sys.copyright)

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

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builtins.credits = _sitebuiltins._Printer(

[362] Fix | Delete

"credits",

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

[364] Fix | Delete

else:

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builtins.credits = _sitebuiltins._Printer("credits", """\

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

[367] Fix | Delete

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

[368] Fix | Delete

files, dirs = [], []

[369] Fix | Delete

# Not all modules are required to have a __file__ attribute. See

[370] Fix | Delete

# PEP 420 for more details.

[371] Fix | Delete

if hasattr(os, '__file__'):

[372] Fix | Delete

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

[373] Fix | Delete

files.extend(["LICENSE.txt", "LICENSE"])

[374] Fix | Delete

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

[375] Fix | Delete

builtins.license = _sitebuiltins._Printer(

[376] Fix | Delete

"license",

[377] Fix | Delete

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

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files, dirs)

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[380] Fix | Delete

[381] Fix | Delete

def sethelper():

[382] Fix | Delete

builtins.help = _sitebuiltins._Helper()

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[384] Fix | Delete

def enablerlcompleter():

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"""Enable default readline configuration on interactive prompts, by

[386] Fix | Delete

registering a sys.__interactivehook__.

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If the readline module can be imported, the hook will set the Tab key

[389] Fix | Delete

as completion key and register ~/.python_history as history file.

[390] Fix | Delete

This can be overridden in the sitecustomize or usercustomize module,

[391] Fix | Delete

or in a PYTHONSTARTUP file.

[392] Fix | Delete

"""

[393] Fix | Delete

def register_readline():

[394] Fix | Delete

import atexit

[395] Fix | Delete

try:

[396] Fix | Delete

import readline

[397] Fix | Delete

import rlcompleter

[398] Fix | Delete

except ImportError:

[399] Fix | Delete

return

[400] Fix | Delete

[401] Fix | Delete

# Reading the initialization (config) file may not be enough to set a

[402] Fix | Delete

# completion key, so we set one first and then read the file.

[403] Fix | Delete

readline_doc = getattr(readline, '__doc__', '')

[404] Fix | Delete

if readline_doc is not None and 'libedit' in readline_doc:

[405] Fix | Delete

readline.parse_and_bind('bind ^I rl_complete')

[406] Fix | Delete

else:

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readline.parse_and_bind('tab: complete')

[408] Fix | Delete

[409] Fix | Delete

try:

[410] Fix | Delete

readline.read_init_file()

[411] Fix | Delete

except OSError:

[412] Fix | Delete

# An OSError here could have many causes, but the most likely one

[413] Fix | Delete

# is that there's no .inputrc file (or .editrc file in the case of

[414] Fix | Delete

# Mac OS X + libedit) in the expected location. In that case, we

[415] Fix | Delete

# want to ignore the exception.

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pass

[417] Fix | Delete

[418] Fix | Delete

if readline.get_current_history_length() == 0:

[419] Fix | Delete

# If no history was loaded, default to .python_history.

[420] Fix | Delete

# The guard is necessary to avoid doubling history size at

[421] Fix | Delete

# each interpreter exit when readline was already configured

[422] Fix | Delete

# through a PYTHONSTARTUP hook, see:

[423] Fix | Delete

# http://bugs.python.org/issue5845#msg198636

[424] Fix | Delete

history = os.path.join(os.path.expanduser('~'),

[425] Fix | Delete

'.python_history')

[426] Fix | Delete

try:

[427] Fix | Delete

readline.read_history_file(history)

[428] Fix | Delete

except IOError:

[429] Fix | Delete

pass

[430] Fix | Delete

[431] Fix | Delete

def write_history():

[432] Fix | Delete

try:

[433] Fix | Delete

readline.write_history_file(history)

[434] Fix | Delete

except (FileNotFoundError, PermissionError):

[435] Fix | Delete

# home directory does not exist or is not writable

[436] Fix | Delete

# https://bugs.python.org/issue19891

[437] Fix | Delete

pass

[438] Fix | Delete

[439] Fix | Delete

atexit.register(write_history)

[440] Fix | Delete

[441] Fix | Delete

sys.__interactivehook__ = register_readline

[442] Fix | Delete

[443] Fix | Delete

def venv(known_paths):

[444] Fix | Delete

global PREFIXES, ENABLE_USER_SITE

[445] Fix | Delete

[446] Fix | Delete

env = os.environ

[447] Fix | Delete

if sys.platform == 'darwin' and '__PYVENV_LAUNCHER__' in env:

[448] Fix | Delete

executable = os.environ['__PYVENV_LAUNCHER__']

[449] Fix | Delete

else:

[450] Fix | Delete

executable = sys.executable

[451] Fix | Delete

exe_dir, _ = os.path.split(os.path.abspath(executable))

[452] Fix | Delete

site_prefix = os.path.dirname(exe_dir)

[453] Fix | Delete

sys._home = None

[454] Fix | Delete

conf_basename = 'pyvenv.cfg'

[455] Fix | Delete

candidate_confs = [

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conffile for conffile in (

[457] Fix | Delete

os.path.join(exe_dir, conf_basename),

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os.path.join(site_prefix, conf_basename)

[459] Fix | Delete

)

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if os.path.isfile(conffile)

[461] Fix | Delete

]

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[463] Fix | Delete

if candidate_confs:

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virtual_conf = candidate_confs[0]

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system_site = "true"

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# Issue 25185: Use UTF-8, as that's what the venv module uses when

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# writing the file.

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with open(virtual_conf, encoding='utf-8') as f:

[469] Fix | Delete

for line in f:

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if '=' in line:

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key, _, value = line.partition('=')

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key = key.strip().lower()

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value = value.strip()

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if key == 'include-system-site-packages':

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system_site = value.lower()

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elif key == 'home':

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sys._home = value

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sys.prefix = sys.exec_prefix = site_prefix

[480] Fix | Delete

[481] Fix | Delete

# Doing this here ensures venv takes precedence over user-site

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addsitepackages(known_paths, [sys.prefix])

[483] Fix | Delete

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# addsitepackages will process site_prefix again if its in PREFIXES,

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# but that's ok; known_paths will prevent anything being added twice

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if system_site == "true":

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PREFIXES.insert(0, sys.prefix)

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else:

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PREFIXES = [sys.prefix]

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ENABLE_USER_SITE = False

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return known_paths

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[494] Fix | Delete

[495] Fix | Delete

def execsitecustomize():

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

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try:

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try:

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