Merge pull request #63 from brenda-br/Fix-35HEADmaster

Restructure Project and Deployment

1 files changed, 0 insertions, 1120 deletions

diff --git a/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/compat.py b/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/compat.py
deleted file mode 100644
index ff328c8..0000000
--- a/venv/Lib/site-packages/pip-19.0.3-py3.7.egg/pip/_vendor/distlib/compat.py
+++ /dev/null
@@ -1,1120 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# Copyright (C) 2013-2017 Vinay Sajip.
-# Licensed to the Python Software Foundation under a contributor agreement.
-# See LICENSE.txt and CONTRIBUTORS.txt.
-#
-from __future__ import absolute_import
-
-import os
-import re
-import sys
-
-try:
-    import ssl
-except ImportError:  # pragma: no cover
-    ssl = None
-
-if sys.version_info[0] < 3:  # pragma: no cover
-    from StringIO import StringIO
-    string_types = basestring,
-    text_type = unicode
-    from types import FileType as file_type
-    import __builtin__ as builtins
-    import ConfigParser as configparser
-    from ._backport import shutil
-    from urlparse import urlparse, urlunparse, urljoin, urlsplit, urlunsplit
-    from urllib import (urlretrieve, quote as _quote, unquote, url2pathname,
-                        pathname2url, ContentTooShortError, splittype)
-
-    def quote(s):
-        if isinstance(s, unicode):
-            s = s.encode('utf-8')
-        return _quote(s)
-
-    import urllib2
-    from urllib2 import (Request, urlopen, URLError, HTTPError,
-                         HTTPBasicAuthHandler, HTTPPasswordMgr,
-                         HTTPHandler, HTTPRedirectHandler,
-                         build_opener)
-    if ssl:
-        from urllib2 import HTTPSHandler
-    import httplib
-    import xmlrpclib
-    import Queue as queue
-    from HTMLParser import HTMLParser
-    import htmlentitydefs
-    raw_input = raw_input
-    from itertools import ifilter as filter
-    from itertools import ifilterfalse as filterfalse
-
-    _userprog = None
-    def splituser(host):
-        """splituser('user[:passwd]@host[:port]') --> 'user[:passwd]', 'host[:port]'."""
-        global _userprog
-        if _userprog is None:
-            import re
-            _userprog = re.compile('^(.*)@(.*)$')
-
-        match = _userprog.match(host)
-        if match: return match.group(1, 2)
-        return None, host
-
-else:  # pragma: no cover
-    from io import StringIO
-    string_types = str,
-    text_type = str
-    from io import TextIOWrapper as file_type
-    import builtins
-    import configparser
-    import shutil
-    from urllib.parse import (urlparse, urlunparse, urljoin, splituser, quote,
-                              unquote, urlsplit, urlunsplit, splittype)
-    from urllib.request import (urlopen, urlretrieve, Request, url2pathname,
-                                pathname2url,
-                                HTTPBasicAuthHandler, HTTPPasswordMgr,
-                                HTTPHandler, HTTPRedirectHandler,
-                                build_opener)
-    if ssl:
-        from urllib.request import HTTPSHandler
-    from urllib.error import HTTPError, URLError, ContentTooShortError
-    import http.client as httplib
-    import urllib.request as urllib2
-    import xmlrpc.client as xmlrpclib
-    import queue
-    from html.parser import HTMLParser
-    import html.entities as htmlentitydefs
-    raw_input = input
-    from itertools import filterfalse
-    filter = filter
-
-try:
-    from ssl import match_hostname, CertificateError
-except ImportError: # pragma: no cover
-    class CertificateError(ValueError):
-        pass
-
-
-    def _dnsname_match(dn, hostname, max_wildcards=1):
-        """Matching according to RFC 6125, section 6.4.3
-
-        http://tools.ietf.org/html/rfc6125#section-6.4.3
-        """
-        pats = []
-        if not dn:
-            return False
-
-        parts = dn.split('.')
-        leftmost, remainder = parts[0], parts[1:]
-
-        wildcards = leftmost.count('*')
-        if wildcards > max_wildcards:
-            # Issue #17980: avoid denials of service by refusing more
-            # than one wildcard per fragment.  A survey of established
-            # policy among SSL implementations showed it to be a
-            # reasonable choice.
-            raise CertificateError(
-                "too many wildcards in certificate DNS name: " + repr(dn))
-
-        # speed up common case w/o wildcards
-        if not wildcards:
-            return dn.lower() == hostname.lower()
-
-        # RFC 6125, section 6.4.3, subitem 1.
-        # The client SHOULD NOT attempt to match a presented identifier in which
-        # the wildcard character comprises a label other than the left-most label.
-        if leftmost == '*':
-            # When '*' is a fragment by itself, it matches a non-empty dotless
-            # fragment.
-            pats.append('[^.]+')
-        elif leftmost.startswith('xn--') or hostname.startswith('xn--'):
-            # RFC 6125, section 6.4.3, subitem 3.
-            # The client SHOULD NOT attempt to match a presented identifier
-            # where the wildcard character is embedded within an A-label or
-            # U-label of an internationalized domain name.
-            pats.append(re.escape(leftmost))
-        else:
-            # Otherwise, '*' matches any dotless string, e.g. www*
-            pats.append(re.escape(leftmost).replace(r'\*', '[^.]*'))
-
-        # add the remaining fragments, ignore any wildcards
-        for frag in remainder:
-            pats.append(re.escape(frag))
-
-        pat = re.compile(r'\A' + r'\.'.join(pats) + r'\Z', re.IGNORECASE)
-        return pat.match(hostname)
-
-
-    def match_hostname(cert, hostname):
-        """Verify that *cert* (in decoded format as returned by
-        SSLSocket.getpeercert()) matches the *hostname*.  RFC 2818 and RFC 6125
-        rules are followed, but IP addresses are not accepted for *hostname*.
-
-        CertificateError is raised on failure. On success, the function
-        returns nothing.
-        """
-        if not cert:
-            raise ValueError("empty or no certificate, match_hostname needs a "
-                             "SSL socket or SSL context with either "
-                             "CERT_OPTIONAL or CERT_REQUIRED")
-        dnsnames = []
-        san = cert.get('subjectAltName', ())
-        for key, value in san:
-            if key == 'DNS':
-                if _dnsname_match(value, hostname):
-                    return
-                dnsnames.append(value)
-        if not dnsnames:
-            # The subject is only checked when there is no dNSName entry
-            # in subjectAltName
-            for sub in cert.get('subject', ()):
-                for key, value in sub:
-                    # XXX according to RFC 2818, the most specific Common Name
-                    # must be used.
-                    if key == 'commonName':
-                        if _dnsname_match(value, hostname):
-                            return
-                        dnsnames.append(value)
-        if len(dnsnames) > 1:
-            raise CertificateError("hostname %r "
-                "doesn't match either of %s"
-                % (hostname, ', '.join(map(repr, dnsnames))))
-        elif len(dnsnames) == 1:
-            raise CertificateError("hostname %r "
-                "doesn't match %r"
-                % (hostname, dnsnames[0]))
-        else:
-            raise CertificateError("no appropriate commonName or "
-                "subjectAltName fields were found")
-
-
-try:
-    from types import SimpleNamespace as Container
-except ImportError:  # pragma: no cover
-    class Container(object):
-        """
-        A generic container for when multiple values need to be returned
-        """
-        def __init__(self, **kwargs):
-            self.__dict__.update(kwargs)
-
-
-try:
-    from shutil import which
-except ImportError:  # pragma: no cover
-    # Implementation from Python 3.3
-    def which(cmd, mode=os.F_OK | os.X_OK, path=None):
-        """Given a command, mode, and a PATH string, return the path which
-        conforms to the given mode on the PATH, or None if there is no such
-        file.
-
-        `mode` defaults to os.F_OK | os.X_OK. `path` defaults to the result
-        of os.environ.get("PATH"), or can be overridden with a custom search
-        path.
-
-        """
-        # Check that a given file can be accessed with the correct mode.
-        # Additionally check that `file` is not a directory, as on Windows
-        # directories pass the os.access check.
-        def _access_check(fn, mode):
-            return (os.path.exists(fn) and os.access(fn, mode)
-                    and not os.path.isdir(fn))
-
-        # If we're given a path with a directory part, look it up directly rather
-        # than referring to PATH directories. This includes checking relative to the
-        # current directory, e.g. ./script
-        if os.path.dirname(cmd):
-            if _access_check(cmd, mode):
-                return cmd
-            return None
-
-        if path is None:
-            path = os.environ.get("PATH", os.defpath)
-        if not path:
-            return None
-        path = path.split(os.pathsep)
-
-        if sys.platform == "win32":
-            # The current directory takes precedence on Windows.
-            if not os.curdir in path:
-                path.insert(0, os.curdir)
-
-            # PATHEXT is necessary to check on Windows.
-            pathext = os.environ.get("PATHEXT", "").split(os.pathsep)
-            # See if the given file matches any of the expected path extensions.
-            # This will allow us to short circuit when given "python.exe".
-            # If it does match, only test that one, otherwise we have to try
-            # others.
-            if any(cmd.lower().endswith(ext.lower()) for ext in pathext):
-                files = [cmd]
-            else:
-                files = [cmd + ext for ext in pathext]
-        else:
-            # On other platforms you don't have things like PATHEXT to tell you
-            # what file suffixes are executable, so just pass on cmd as-is.
-            files = [cmd]
-
-        seen = set()
-        for dir in path:
-            normdir = os.path.normcase(dir)
-            if not normdir in seen:
-                seen.add(normdir)
-                for thefile in files:
-                    name = os.path.join(dir, thefile)
-                    if _access_check(name, mode):
-                        return name
-        return None
-
-
-# ZipFile is a context manager in 2.7, but not in 2.6
-
-from zipfile import ZipFile as BaseZipFile
-
-if hasattr(BaseZipFile, '__enter__'):  # pragma: no cover
-    ZipFile = BaseZipFile
-else:  # pragma: no cover
-    from zipfile import ZipExtFile as BaseZipExtFile
-
-    class ZipExtFile(BaseZipExtFile):
-        def __init__(self, base):
-            self.__dict__.update(base.__dict__)
-
-        def __enter__(self):
-            return self
-
-        def __exit__(self, *exc_info):
-            self.close()
-            # return None, so if an exception occurred, it will propagate
-
-    class ZipFile(BaseZipFile):
-        def __enter__(self):
-            return self
-
-        def __exit__(self, *exc_info):
-            self.close()
-            # return None, so if an exception occurred, it will propagate
-
-        def open(self, *args, **kwargs):
-            base = BaseZipFile.open(self, *args, **kwargs)
-            return ZipExtFile(base)
-
-try:
-    from platform import python_implementation
-except ImportError: # pragma: no cover
-    def python_implementation():
-        """Return a string identifying the Python implementation."""
-        if 'PyPy' in sys.version:
-            return 'PyPy'
-        if os.name == 'java':
-            return 'Jython'
-        if sys.version.startswith('IronPython'):
-            return 'IronPython'
-        return 'CPython'
-
-try:
-    import sysconfig
-except ImportError: # pragma: no cover
-    from ._backport import sysconfig
-
-try:
-    callable = callable
-except NameError:   # pragma: no cover
-    from collections import Callable
-
-    def callable(obj):
-        return isinstance(obj, Callable)
-
-
-try:
-    fsencode = os.fsencode
-    fsdecode = os.fsdecode
-except AttributeError:  # pragma: no cover
-    # Issue #99: on some systems (e.g. containerised),
-    # sys.getfilesystemencoding() returns None, and we need a real value,
-    # so fall back to utf-8. From the CPython 2.7 docs relating to Unix and
-    # sys.getfilesystemencoding(): the return value is "the user’s preference
-    # according to the result of nl_langinfo(CODESET), or None if the
-    # nl_langinfo(CODESET) failed."
-    _fsencoding = sys.getfilesystemencoding() or 'utf-8'
-    if _fsencoding == 'mbcs':
-        _fserrors = 'strict'
-    else:
-        _fserrors = 'surrogateescape'
-
-    def fsencode(filename):
-        if isinstance(filename, bytes):
-            return filename
-        elif isinstance(filename, text_type):
-            return filename.encode(_fsencoding, _fserrors)
-        else:
-            raise TypeError("expect bytes or str, not %s" %
-                            type(filename).__name__)
-
-    def fsdecode(filename):
-        if isinstance(filename, text_type):
-            return filename
-        elif isinstance(filename, bytes):
-            return filename.decode(_fsencoding, _fserrors)
-        else:
-            raise TypeError("expect bytes or str, not %s" %
-                            type(filename).__name__)
-
-try:
-    from tokenize import detect_encoding
-except ImportError: # pragma: no cover
-    from codecs import BOM_UTF8, lookup
-    import re
-
-    cookie_re = re.compile(r"coding[:=]\s*([-\w.]+)")
-
-    def _get_normal_name(orig_enc):
-        """Imitates get_normal_name in tokenizer.c."""
-        # Only care about the first 12 characters.
-        enc = orig_enc[:12].lower().replace("_", "-")
-        if enc == "utf-8" or enc.startswith("utf-8-"):
-            return "utf-8"
-        if enc in ("latin-1", "iso-8859-1", "iso-latin-1") or \
-           enc.startswith(("latin-1-", "iso-8859-1-", "iso-latin-1-")):
-            return "iso-8859-1"
-        return orig_enc
-
-    def detect_encoding(readline):
-        """
-        The detect_encoding() function is used to detect the encoding that should
-        be used to decode a Python source file.  It requires one argument, readline,
-        in the same way as the tokenize() generator.
-
-        It will call readline a maximum of twice, and return the encoding used
-        (as a string) and a list of any lines (left as bytes) it has read in.
-
-        It detects the encoding from the presence of a utf-8 bom or an encoding
-        cookie as specified in pep-0263.  If both a bom and a cookie are present,
-        but disagree, a SyntaxError will be raised.  If the encoding cookie is an
-        invalid charset, raise a SyntaxError.  Note that if a utf-8 bom is found,
-        'utf-8-sig' is returned.
-
-        If no encoding is specified, then the default of 'utf-8' will be returned.
-        """
-        try:
-            filename = readline.__self__.name
-        except AttributeError:
-            filename = None
-        bom_found = False
-        encoding = None
-        default = 'utf-8'
-        def read_or_stop():
-            try:
-                return readline()
-            except StopIteration:
-                return b''
-
-        def find_cookie(line):
-            try:
-                # Decode as UTF-8. Either the line is an encoding declaration,
-                # in which case it should be pure ASCII, or it must be UTF-8
-                # per default encoding.
-                line_string = line.decode('utf-8')
-            except UnicodeDecodeError:
-                msg = "invalid or missing encoding declaration"
-                if filename is not None:
-                    msg = '{} for {!r}'.format(msg, filename)
-                raise SyntaxError(msg)
-
-            matches = cookie_re.findall(line_string)
-            if not matches:
-                return None
-            encoding = _get_normal_name(matches[0])
-            try:
-                codec = lookup(encoding)
-            except LookupError:
-                # This behaviour mimics the Python interpreter
-                if filename is None:
-                    msg = "unknown encoding: " + encoding
-                else:
-                    msg = "unknown encoding for {!r}: {}".format(filename,
-                            encoding)
-                raise SyntaxError(msg)
-
-            if bom_found:
-                if codec.name != 'utf-8':
-                    # This behaviour mimics the Python interpreter
-                    if filename is None:
-                        msg = 'encoding problem: utf-8'
-                    else:
-                        msg = 'encoding problem for {!r}: utf-8'.format(filename)
-                    raise SyntaxError(msg)
-                encoding += '-sig'
-            return encoding
-
-        first = read_or_stop()
-        if first.startswith(BOM_UTF8):
-            bom_found = True
-            first = first[3:]
-            default = 'utf-8-sig'
-        if not first:
-            return default, []
-
-        encoding = find_cookie(first)
-        if encoding:
-            return encoding, [first]
-
-        second = read_or_stop()
-        if not second:
-            return default, [first]
-
-        encoding = find_cookie(second)
-        if encoding:
-            return encoding, [first, second]
-
-        return default, [first, second]
-
-# For converting & <-> &amp; etc.
-try:
-    from html import escape
-except ImportError:
-    from cgi import escape
-if sys.version_info[:2] < (3, 4):
-    unescape = HTMLParser().unescape
-else:
-    from html import unescape
-
-try:
-    from collections import ChainMap
-except ImportError: # pragma: no cover
-    from collections import MutableMapping
-
-    try:
-        from reprlib import recursive_repr as _recursive_repr
-    except ImportError:
-        def _recursive_repr(fillvalue='...'):
-            '''
-            Decorator to make a repr function return fillvalue for a recursive
-            call
-            '''
-
-            def decorating_function(user_function):
-                repr_running = set()
-
-                def wrapper(self):
-                    key = id(self), get_ident()
-                    if key in repr_running:
-                        return fillvalue
-                    repr_running.add(key)
-                    try:
-                        result = user_function(self)
-                    finally:
-                        repr_running.discard(key)
-                    return result
-
-                # Can't use functools.wraps() here because of bootstrap issues
-                wrapper.__module__ = getattr(user_function, '__module__')
-                wrapper.__doc__ = getattr(user_function, '__doc__')
-                wrapper.__name__ = getattr(user_function, '__name__')
-                wrapper.__annotations__ = getattr(user_function, '__annotations__', {})
-                return wrapper
-
-            return decorating_function
-
-    class ChainMap(MutableMapping):
-        ''' A ChainMap groups multiple dicts (or other mappings) together
-        to create a single, updateable view.
-
-        The underlying mappings are stored in a list.  That list is public and can
-        accessed or updated using the *maps* attribute.  There is no other state.
-
-        Lookups search the underlying mappings successively until a key is found.
-        In contrast, writes, updates, and deletions only operate on the first
-        mapping.
-
-        '''
-
-        def __init__(self, *maps):
-            '''Initialize a ChainMap by setting *maps* to the given mappings.
-            If no mappings are provided, a single empty dictionary is used.
-
-            '''
-            self.maps = list(maps) or [{}]          # always at least one map
-
-        def __missing__(self, key):
-            raise KeyError(key)
-
-        def __getitem__(self, key):
-            for mapping in self.maps:
-                try:
-                    return mapping[key]             # can't use 'key in mapping' with defaultdict
-                except KeyError:
-                    pass
-            return self.__missing__(key)            # support subclasses that define __missing__
-
-        def get(self, key, default=None):
-            return self[key] if key in self else default
-
-        def __len__(self):
-            return len(set().union(*self.maps))     # reuses stored hash values if possible
-
-        def __iter__(self):
-            return iter(set().union(*self.maps))
-
-        def __contains__(self, key):
-            return any(key in m for m in self.maps)
-
-        def __bool__(self):
-            return any(self.maps)
-
-        @_recursive_repr()
-        def __repr__(self):
-            return '{0.__class__.__name__}({1})'.format(
-                self, ', '.join(map(repr, self.maps)))
-
-        @classmethod
-        def fromkeys(cls, iterable, *args):
-            'Create a ChainMap with a single dict created from the iterable.'
-            return cls(dict.fromkeys(iterable, *args))
-
-        def copy(self):
-            'New ChainMap or subclass with a new copy of maps[0] and refs to maps[1:]'
-            return self.__class__(self.maps[0].copy(), *self.maps[1:])
-
-        __copy__ = copy
-
-        def new_child(self):                        # like Django's Context.push()
-            'New ChainMap with a new dict followed by all previous maps.'
-            return self.__class__({}, *self.maps)
-
-        @property
-        def parents(self):                          # like Django's Context.pop()
-            'New ChainMap from maps[1:].'
-            return self.__class__(*self.maps[1:])
-
-        def __setitem__(self, key, value):
-            self.maps[0][key] = value
-
-        def __delitem__(self, key):
-            try:
-                del self.maps[0][key]
-            except KeyError:
-                raise KeyError('Key not found in the first mapping: {!r}'.format(key))
-
-        def popitem(self):
-            'Remove and return an item pair from maps[0]. Raise KeyError is maps[0] is empty.'
-            try:
-                return self.maps[0].popitem()
-            except KeyError:
-                raise KeyError('No keys found in the first mapping.')
-
-        def pop(self, key, *args):
-            'Remove *key* from maps[0] and return its value. Raise KeyError if *key* not in maps[0].'
-            try:
-                return self.maps[0].pop(key, *args)
-            except KeyError:
-                raise KeyError('Key not found in the first mapping: {!r}'.format(key))
-
-        def clear(self):
-            'Clear maps[0], leaving maps[1:] intact.'
-            self.maps[0].clear()
-
-try:
-    from importlib.util import cache_from_source  # Python >= 3.4
-except ImportError:  # pragma: no cover
-    try:
-        from imp import cache_from_source
-    except ImportError:  # pragma: no cover
-        def cache_from_source(path, debug_override=None):
-            assert path.endswith('.py')
-            if debug_override is None:
-                debug_override = __debug__
-            if debug_override:
-                suffix = 'c'
-            else:
-                suffix = 'o'
-            return path + suffix
-
-try:
-    from collections import OrderedDict
-except ImportError: # pragma: no cover
-## {{{ http://code.activestate.com/recipes/576693/ (r9)
-# Backport of OrderedDict() class that runs on Python 2.4, 2.5, 2.6, 2.7 and pypy.
-# Passes Python2.7's test suite and incorporates all the latest updates.
-    try:
-        from thread import get_ident as _get_ident
-    except ImportError:
-        from dummy_thread import get_ident as _get_ident
-
-    try:
-        from _abcoll import KeysView, ValuesView, ItemsView
-    except ImportError:
-        pass
-
-
-    class OrderedDict(dict):
-        'Dictionary that remembers insertion order'
-        # An inherited dict maps keys to values.
-        # The inherited dict provides __getitem__, __len__, __contains__, and get.
-        # The remaining methods are order-aware.
-        # Big-O running times for all methods are the same as for regular dictionaries.
-
-        # The internal self.__map dictionary maps keys to links in a doubly linked list.
-        # The circular doubly linked list starts and ends with a sentinel element.
-        # The sentinel element never gets deleted (this simplifies the algorithm).
-        # Each link is stored as a list of length three:  [PREV, NEXT, KEY].
-
-        def __init__(self, *args, **kwds):
-            '''Initialize an ordered dictionary.  Signature is the same as for
-            regular dictionaries, but keyword arguments are not recommended
-            because their insertion order is arbitrary.
-
-            '''
-            if len(args) > 1:
-                raise TypeError('expected at most 1 arguments, got %d' % len(args))
-            try:
-                self.__root
-            except AttributeError:
-                self.__root = root = []                     # sentinel node
-                root[:] = [root, root, None]
-                self.__map = {}
-            self.__update(*args, **kwds)
-
-        def __setitem__(self, key, value, dict_setitem=dict.__setitem__):
-            'od.__setitem__(i, y) <==> od[i]=y'
-            # Setting a new item creates a new link which goes at the end of the linked
-            # list, and the inherited dictionary is updated with the new key/value pair.
-            if key not in self:
-                root = self.__root
-                last = root[0]
-                last[1] = root[0] = self.__map[key] = [last, root, key]
-            dict_setitem(self, key, value)
-
-        def __delitem__(self, key, dict_delitem=dict.__delitem__):
-            'od.__delitem__(y) <==> del od[y]'
-            # Deleting an existing item uses self.__map to find the link which is
-            # then removed by updating the links in the predecessor and successor nodes.
-            dict_delitem(self, key)
-            link_prev, link_next, key = self.__map.pop(key)
-            link_prev[1] = link_next
-            link_next[0] = link_prev
-
-        def __iter__(self):
-            'od.__iter__() <==> iter(od)'
-            root = self.__root
-            curr = root[1]
-            while curr is not root:
-                yield curr[2]
-                curr = curr[1]
-
-        def __reversed__(self):
-            'od.__reversed__() <==> reversed(od)'
-            root = self.__root
-            curr = root[0]
-            while curr is not root:
-                yield curr[2]
-                curr = curr[0]
-
-        def clear(self):
-            'od.clear() -> None.  Remove all items from od.'
-            try:
-                for node in self.__map.itervalues():
-                    del node[:]
-                root = self.__root
-                root[:] = [root, root, None]
-                self.__map.clear()
-            except AttributeError:
-                pass
-            dict.clear(self)
-
-        def popitem(self, last=True):
-            '''od.popitem() -> (k, v), return and remove a (key, value) pair.
-            Pairs are returned in LIFO order if last is true or FIFO order if false.
-
-            '''
-            if not self:
-                raise KeyError('dictionary is empty')
-            root = self.__root
-            if last:
-                link = root[0]
-                link_prev = link[0]
-                link_prev[1] = root
-                root[0] = link_prev
-            else:
-                link = root[1]
-                link_next = link[1]
-                root[1] = link_next
-                link_next[0] = root
-            key = link[2]
-            del self.__map[key]
-            value = dict.pop(self, key)
-            return key, value
-
-        # -- the following methods do not depend on the internal structure --
-
-        def keys(self):
-            'od.keys() -> list of keys in od'
-            return list(self)
-
-        def values(self):
-            'od.values() -> list of values in od'
-            return [self[key] for key in self]
-
-        def items(self):
-            'od.items() -> list of (key, value) pairs in od'
-            return [(key, self[key]) for key in self]
-
-        def iterkeys(self):
-            'od.iterkeys() -> an iterator over the keys in od'
-            return iter(self)
-
-        def itervalues(self):
-            'od.itervalues -> an iterator over the values in od'
-            for k in self:
-                yield self[k]
-
-        def iteritems(self):
-            'od.iteritems -> an iterator over the (key, value) items in od'
-            for k in self:
-                yield (k, self[k])
-
-        def update(*args, **kwds):
-            '''od.update(E, **F) -> None.  Update od from dict/iterable E and F.
-
-            If E is a dict instance, does:           for k in E: od[k] = E[k]
-            If E has a .keys() method, does:         for k in E.keys(): od[k] = E[k]
-            Or if E is an iterable of items, does:   for k, v in E: od[k] = v
-            In either case, this is followed by:     for k, v in F.items(): od[k] = v
-
-            '''
-            if len(args) > 2:
-                raise TypeError('update() takes at most 2 positional '
-                                'arguments (%d given)' % (len(args),))
-            elif not args:
-                raise TypeError('update() takes at least 1 argument (0 given)')
-            self = args[0]
-            # Make progressively weaker assumptions about "other"
-            other = ()
-            if len(args) == 2:
-                other = args[1]
-            if isinstance(other, dict):
-                for key in other:
-                    self[key] = other[key]
-            elif hasattr(other, 'keys'):
-                for key in other.keys():
-                    self[key] = other[key]
-            else:
-                for key, value in other:
-                    self[key] = value
-            for key, value in kwds.items():
-                self[key] = value
-
-        __update = update  # let subclasses override update without breaking __init__
-
-        __marker = object()
-
-        def pop(self, key, default=__marker):
-            '''od.pop(k[,d]) -> v, remove specified key and return the corresponding value.
-            If key is not found, d is returned if given, otherwise KeyError is raised.
-
-            '''
-            if key in self:
-                result = self[key]
-                del self[key]
-                return result
-            if default is self.__marker:
-                raise KeyError(key)
-            return default
-
-        def setdefault(self, key, default=None):
-            'od.setdefault(k[,d]) -> od.get(k,d), also set od[k]=d if k not in od'
-            if key in self:
-                return self[key]
-            self[key] = default
-            return default
-
-        def __repr__(self, _repr_running=None):
-            'od.__repr__() <==> repr(od)'
-            if not _repr_running: _repr_running = {}
-            call_key = id(self), _get_ident()
-            if call_key in _repr_running:
-                return '...'
-            _repr_running[call_key] = 1
-            try:
-                if not self:
-                    return '%s()' % (self.__class__.__name__,)
-                return '%s(%r)' % (self.__class__.__name__, self.items())
-            finally:
-                del _repr_running[call_key]
-
-        def __reduce__(self):
-            'Return state information for pickling'
-            items = [[k, self[k]] for k in self]
-            inst_dict = vars(self).copy()
-            for k in vars(OrderedDict()):
-                inst_dict.pop(k, None)
-            if inst_dict:
-                return (self.__class__, (items,), inst_dict)
-            return self.__class__, (items,)
-
-        def copy(self):
-            'od.copy() -> a shallow copy of od'
-            return self.__class__(self)
-
-        @classmethod
-        def fromkeys(cls, iterable, value=None):
-            '''OD.fromkeys(S[, v]) -> New ordered dictionary with keys from S
-            and values equal to v (which defaults to None).
-
-            '''
-            d = cls()
-            for key in iterable:
-                d[key] = value
-            return d
-
-        def __eq__(self, other):
-            '''od.__eq__(y) <==> od==y.  Comparison to another OD is order-sensitive
-            while comparison to a regular mapping is order-insensitive.
-
-            '''
-            if isinstance(other, OrderedDict):
-                return len(self)==len(other) and self.items() == other.items()
-            return dict.__eq__(self, other)
-
-        def __ne__(self, other):
-            return not self == other
-
-        # -- the following methods are only used in Python 2.7 --
-
-        def viewkeys(self):
-            "od.viewkeys() -> a set-like object providing a view on od's keys"
-            return KeysView(self)
-
-        def viewvalues(self):
-            "od.viewvalues() -> an object providing a view on od's values"
-            return ValuesView(self)
-
-        def viewitems(self):
-            "od.viewitems() -> a set-like object providing a view on od's items"
-            return ItemsView(self)
-
-try:
-    from logging.config import BaseConfigurator, valid_ident
-except ImportError: # pragma: no cover
-    IDENTIFIER = re.compile('^[a-z_][a-z0-9_]*$', re.I)
-
-
-    def valid_ident(s):
-        m = IDENTIFIER.match(s)
-        if not m:
-            raise ValueError('Not a valid Python identifier: %r' % s)
-        return True
-
-
-    # The ConvertingXXX classes are wrappers around standard Python containers,
-    # and they serve to convert any suitable values in the container. The
-    # conversion converts base dicts, lists and tuples to their wrapped
-    # equivalents, whereas strings which match a conversion format are converted
-    # appropriately.
-    #
-    # Each wrapper should have a configurator attribute holding the actual
-    # configurator to use for conversion.
-
-    class ConvertingDict(dict):
-        """A converting dictionary wrapper."""
-
-        def __getitem__(self, key):
-            value = dict.__getitem__(self, key)
-            result = self.configurator.convert(value)
-            #If the converted value is different, save for next time
-            if value is not result:
-                self[key] = result
-                if type(result) in (ConvertingDict, ConvertingList,
-                                    ConvertingTuple):
-                    result.parent = self
-                    result.key = key
-            return result
-
-        def get(self, key, default=None):
-            value = dict.get(self, key, default)
-            result = self.configurator.convert(value)
-            #If the converted value is different, save for next time
-            if value is not result:
-                self[key] = result
-                if type(result) in (ConvertingDict, ConvertingList,
-                                    ConvertingTuple):
-                    result.parent = self
-                    result.key = key
-            return result
-
-    def pop(self, key, default=None):
-        value = dict.pop(self, key, default)
-        result = self.configurator.convert(value)
-        if value is not result:
-            if type(result) in (ConvertingDict, ConvertingList,
-                                ConvertingTuple):
-                result.parent = self
-                result.key = key
-        return result
-
-    class ConvertingList(list):
-        """A converting list wrapper."""
-        def __getitem__(self, key):
-            value = list.__getitem__(self, key)
-            result = self.configurator.convert(value)
-            #If the converted value is different, save for next time
-            if value is not result:
-                self[key] = result
-                if type(result) in (ConvertingDict, ConvertingList,
-                                    ConvertingTuple):
-                    result.parent = self
-                    result.key = key
-            return result
-
-        def pop(self, idx=-1):
-            value = list.pop(self, idx)
-            result = self.configurator.convert(value)
-            if value is not result:
-                if type(result) in (ConvertingDict, ConvertingList,
-                                    ConvertingTuple):
-                    result.parent = self
-            return result
-
-    class ConvertingTuple(tuple):
-        """A converting tuple wrapper."""
-        def __getitem__(self, key):
-            value = tuple.__getitem__(self, key)
-            result = self.configurator.convert(value)
-            if value is not result:
-                if type(result) in (ConvertingDict, ConvertingList,
-                                    ConvertingTuple):
-                    result.parent = self
-                    result.key = key
-            return result
-
-    class BaseConfigurator(object):
-        """
-        The configurator base class which defines some useful defaults.
-        """
-
-        CONVERT_PATTERN = re.compile(r'^(?P<prefix>[a-z]+)://(?P<suffix>.*)$')
-
-        WORD_PATTERN = re.compile(r'^\s*(\w+)\s*')
-        DOT_PATTERN = re.compile(r'^\.\s*(\w+)\s*')
-        INDEX_PATTERN = re.compile(r'^\[\s*(\w+)\s*\]\s*')
-        DIGIT_PATTERN = re.compile(r'^\d+$')
-
-        value_converters = {
-            'ext' : 'ext_convert',
-            'cfg' : 'cfg_convert',
-        }
-
-        # We might want to use a different one, e.g. importlib
-        importer = staticmethod(__import__)
-
-        def __init__(self, config):
-            self.config = ConvertingDict(config)
-            self.config.configurator = self
-
-        def resolve(self, s):
-            """
-            Resolve strings to objects using standard import and attribute
-            syntax.
-            """
-            name = s.split('.')
-            used = name.pop(0)
-            try:
-                found = self.importer(used)
-                for frag in name:
-                    used += '.' + frag
-                    try:
-                        found = getattr(found, frag)
-                    except AttributeError:
-                        self.importer(used)
-                        found = getattr(found, frag)
-                return found
-            except ImportError:
-                e, tb = sys.exc_info()[1:]
-                v = ValueError('Cannot resolve %r: %s' % (s, e))
-                v.__cause__, v.__traceback__ = e, tb
-                raise v
-
-        def ext_convert(self, value):
-            """Default converter for the ext:// protocol."""
-            return self.resolve(value)
-
-        def cfg_convert(self, value):
-            """Default converter for the cfg:// protocol."""
-            rest = value
-            m = self.WORD_PATTERN.match(rest)
-            if m is None:
-                raise ValueError("Unable to convert %r" % value)
-            else:
-                rest = rest[m.end():]
-                d = self.config[m.groups()[0]]
-                #print d, rest
-                while rest:
-                    m = self.DOT_PATTERN.match(rest)
-                    if m:
-                        d = d[m.groups()[0]]
-                    else:
-                        m = self.INDEX_PATTERN.match(rest)
-                        if m:
-                            idx = m.groups()[0]
-                            if not self.DIGIT_PATTERN.match(idx):
-                                d = d[idx]
-                            else:
-                                try:
-                                    n = int(idx) # try as number first (most likely)
-                                    d = d[n]
-                                except TypeError:
-                                    d = d[idx]
-                    if m:
-                        rest = rest[m.end():]
-                    else:
-                        raise ValueError('Unable to convert '
-                                         '%r at %r' % (value, rest))
-            #rest should be empty
-            return d
-
-        def convert(self, value):
-            """
-            Convert values to an appropriate type. dicts, lists and tuples are
-            replaced by their converting alternatives. Strings are checked to
-            see if they have a conversion format and are converted if they do.
-            """
-            if not isinstance(value, ConvertingDict) and isinstance(value, dict):
-                value = ConvertingDict(value)
-                value.configurator = self
-            elif not isinstance(value, ConvertingList) and isinstance(value, list):
-                value = ConvertingList(value)
-                value.configurator = self
-            elif not isinstance(value, ConvertingTuple) and\
-                     isinstance(value, tuple):
-                value = ConvertingTuple(value)
-                value.configurator = self
-            elif isinstance(value, string_types):
-                m = self.CONVERT_PATTERN.match(value)
-                if m:
-                    d = m.groupdict()
-                    prefix = d['prefix']
-                    converter = self.value_converters.get(prefix, None)
-                    if converter:
-                        suffix = d['suffix']
-                        converter = getattr(self, converter)
-                        value = converter(suffix)
-            return value
-
-        def configure_custom(self, config):
-            """Configure an object with a user-supplied factory."""
-            c = config.pop('()')
-            if not callable(c):
-                c = self.resolve(c)
-            props = config.pop('.', None)
-            # Check for valid identifiers
-            kwargs = dict([(k, config[k]) for k in config if valid_ident(k)])
-            result = c(**kwargs)
-            if props:
-                for name, value in props.items():
-                    setattr(result, name, value)
-            return result
-
-        def as_tuple(self, value):
-            """Utility function which converts lists to tuples."""
-            if isinstance(value, list):
-                value = tuple(value)
-            return value