--- a/env/lib/python3.7/site-packages/jinja2/utils.py	Thu May 14 16:47:39 2020 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,732 +0,0 @@
-# -*- coding: utf-8 -*-
-import json
-import os
-import re
-import warnings
-from collections import deque
-from random import choice
-from random import randrange
-from threading import Lock
-
-from markupsafe import escape
-from markupsafe import Markup
-
-from ._compat import abc
-from ._compat import string_types
-from ._compat import text_type
-from ._compat import url_quote
-
-_word_split_re = re.compile(r"(\s+)")
-_punctuation_re = re.compile(
-    "^(?P<lead>(?:%s)*)(?P<middle>.*?)(?P<trail>(?:%s)*)$"
-    % (
-        "|".join(map(re.escape, ("(", "<", "&lt;"))),
-        "|".join(map(re.escape, (".", ",", ")", ">", "\n", "&gt;"))),
-    )
-)
-_simple_email_re = re.compile(r"^\S+@[a-zA-Z0-9._-]+\.[a-zA-Z0-9._-]+$")
-_striptags_re = re.compile(r"(<!--.*?-->|<[^>]*>)")
-_entity_re = re.compile(r"&([^;]+);")
-_letters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
-_digits = "0123456789"
-
-# special singleton representing missing values for the runtime
-missing = type("MissingType", (), {"__repr__": lambda x: "missing"})()
-
-# internal code
-internal_code = set()
-
-concat = u"".join
-
-_slash_escape = "\\/" not in json.dumps("/")
-
-
-def contextfunction(f):
-    """This decorator can be used to mark a function or method context callable.
-    A context callable is passed the active :class:`Context` as first argument when
-    called from the template.  This is useful if a function wants to get access
-    to the context or functions provided on the context object.  For example
-    a function that returns a sorted list of template variables the current
-    template exports could look like this::
-
-        @contextfunction
-        def get_exported_names(context):
-            return sorted(context.exported_vars)
-    """
-    f.contextfunction = True
-    return f
-
-
-def evalcontextfunction(f):
-    """This decorator can be used to mark a function or method as an eval
-    context callable.  This is similar to the :func:`contextfunction`
-    but instead of passing the context, an evaluation context object is
-    passed.  For more information about the eval context, see
-    :ref:`eval-context`.
-
-    .. versionadded:: 2.4
-    """
-    f.evalcontextfunction = True
-    return f
-
-
-def environmentfunction(f):
-    """This decorator can be used to mark a function or method as environment
-    callable.  This decorator works exactly like the :func:`contextfunction`
-    decorator just that the first argument is the active :class:`Environment`
-    and not context.
-    """
-    f.environmentfunction = True
-    return f
-
-
-def internalcode(f):
-    """Marks the function as internally used"""
-    internal_code.add(f.__code__)
-    return f
-
-
-def is_undefined(obj):
-    """Check if the object passed is undefined.  This does nothing more than
-    performing an instance check against :class:`Undefined` but looks nicer.
-    This can be used for custom filters or tests that want to react to
-    undefined variables.  For example a custom default filter can look like
-    this::
-
-        def default(var, default=''):
-            if is_undefined(var):
-                return default
-            return var
-    """
-    from .runtime import Undefined
-
-    return isinstance(obj, Undefined)
-
-
-def consume(iterable):
-    """Consumes an iterable without doing anything with it."""
-    for _ in iterable:
-        pass
-
-
-def clear_caches():
-    """Jinja keeps internal caches for environments and lexers.  These are
-    used so that Jinja doesn't have to recreate environments and lexers all
-    the time.  Normally you don't have to care about that but if you are
-    measuring memory consumption you may want to clean the caches.
-    """
-    from .environment import _spontaneous_environments
-    from .lexer import _lexer_cache
-
-    _spontaneous_environments.clear()
-    _lexer_cache.clear()
-
-
-def import_string(import_name, silent=False):
-    """Imports an object based on a string.  This is useful if you want to
-    use import paths as endpoints or something similar.  An import path can
-    be specified either in dotted notation (``xml.sax.saxutils.escape``)
-    or with a colon as object delimiter (``xml.sax.saxutils:escape``).
-
-    If the `silent` is True the return value will be `None` if the import
-    fails.
-
-    :return: imported object
-    """
-    try:
-        if ":" in import_name:
-            module, obj = import_name.split(":", 1)
-        elif "." in import_name:
-            module, _, obj = import_name.rpartition(".")
-        else:
-            return __import__(import_name)
-        return getattr(__import__(module, None, None, [obj]), obj)
-    except (ImportError, AttributeError):
-        if not silent:
-            raise
-
-
-def open_if_exists(filename, mode="rb"):
-    """Returns a file descriptor for the filename if that file exists,
-    otherwise ``None``.
-    """
-    if not os.path.isfile(filename):
-        return None
-
-    return open(filename, mode)
-
-
-def object_type_repr(obj):
-    """Returns the name of the object's type.  For some recognized
-    singletons the name of the object is returned instead. (For
-    example for `None` and `Ellipsis`).
-    """
-    if obj is None:
-        return "None"
-    elif obj is Ellipsis:
-        return "Ellipsis"
-
-    cls = type(obj)
-
-    # __builtin__ in 2.x, builtins in 3.x
-    if cls.__module__ in ("__builtin__", "builtins"):
-        name = cls.__name__
-    else:
-        name = cls.__module__ + "." + cls.__name__
-
-    return "%s object" % name
-
-
-def pformat(obj, verbose=False):
-    """Prettyprint an object.  Either use the `pretty` library or the
-    builtin `pprint`.
-    """
-    try:
-        from pretty import pretty
-
-        return pretty(obj, verbose=verbose)
-    except ImportError:
-        from pprint import pformat
-
-        return pformat(obj)
-
-
-def urlize(text, trim_url_limit=None, rel=None, target=None):
-    """Converts any URLs in text into clickable links. Works on http://,
-    https:// and www. links. Links can have trailing punctuation (periods,
-    commas, close-parens) and leading punctuation (opening parens) and
-    it'll still do the right thing.
-
-    If trim_url_limit is not None, the URLs in link text will be limited
-    to trim_url_limit characters.
-
-    If nofollow is True, the URLs in link text will get a rel="nofollow"
-    attribute.
-
-    If target is not None, a target attribute will be added to the link.
-    """
-    trim_url = (
-        lambda x, limit=trim_url_limit: limit is not None
-        and (x[:limit] + (len(x) >= limit and "..." or ""))
-        or x
-    )
-    words = _word_split_re.split(text_type(escape(text)))
-    rel_attr = rel and ' rel="%s"' % text_type(escape(rel)) or ""
-    target_attr = target and ' target="%s"' % escape(target) or ""
-
-    for i, word in enumerate(words):
-        match = _punctuation_re.match(word)
-        if match:
-            lead, middle, trail = match.groups()
-            if middle.startswith("www.") or (
-                "@" not in middle
-                and not middle.startswith("http://")
-                and not middle.startswith("https://")
-                and len(middle) > 0
-                and middle[0] in _letters + _digits
-                and (
-                    middle.endswith(".org")
-                    or middle.endswith(".net")
-                    or middle.endswith(".com")
-                )
-            ):
-                middle = '<a href="http://%s"%s%s>%s</a>' % (
-                    middle,
-                    rel_attr,
-                    target_attr,
-                    trim_url(middle),
-                )
-            if middle.startswith("http://") or middle.startswith("https://"):
-                middle = '<a href="%s"%s%s>%s</a>' % (
-                    middle,
-                    rel_attr,
-                    target_attr,
-                    trim_url(middle),
-                )
-            if (
-                "@" in middle
-                and not middle.startswith("www.")
-                and ":" not in middle
-                and _simple_email_re.match(middle)
-            ):
-                middle = '<a href="mailto:%s">%s</a>' % (middle, middle)
-            if lead + middle + trail != word:
-                words[i] = lead + middle + trail
-    return u"".join(words)
-
-
-def generate_lorem_ipsum(n=5, html=True, min=20, max=100):
-    """Generate some lorem ipsum for the template."""
-    from .constants import LOREM_IPSUM_WORDS
-
-    words = LOREM_IPSUM_WORDS.split()
-    result = []
-
-    for _ in range(n):
-        next_capitalized = True
-        last_comma = last_fullstop = 0
-        word = None
-        last = None
-        p = []
-
-        # each paragraph contains out of 20 to 100 words.
-        for idx, _ in enumerate(range(randrange(min, max))):
-            while True:
-                word = choice(words)
-                if word != last:
-                    last = word
-                    break
-            if next_capitalized:
-                word = word.capitalize()
-                next_capitalized = False
-            # add commas
-            if idx - randrange(3, 8) > last_comma:
-                last_comma = idx
-                last_fullstop += 2
-                word += ","
-            # add end of sentences
-            if idx - randrange(10, 20) > last_fullstop:
-                last_comma = last_fullstop = idx
-                word += "."
-                next_capitalized = True
-            p.append(word)
-
-        # ensure that the paragraph ends with a dot.
-        p = u" ".join(p)
-        if p.endswith(","):
-            p = p[:-1] + "."
-        elif not p.endswith("."):
-            p += "."
-        result.append(p)
-
-    if not html:
-        return u"\n\n".join(result)
-    return Markup(u"\n".join(u"<p>%s</p>" % escape(x) for x in result))
-
-
-def unicode_urlencode(obj, charset="utf-8", for_qs=False):
-    """Quote a string for use in a URL using the given charset.
-
-    This function is misnamed, it is a wrapper around
-    :func:`urllib.parse.quote`.
-
-    :param obj: String or bytes to quote. Other types are converted to
-        string then encoded to bytes using the given charset.
-    :param charset: Encode text to bytes using this charset.
-    :param for_qs: Quote "/" and use "+" for spaces.
-    """
-    if not isinstance(obj, string_types):
-        obj = text_type(obj)
-
-    if isinstance(obj, text_type):
-        obj = obj.encode(charset)
-
-    safe = b"" if for_qs else b"/"
-    rv = url_quote(obj, safe)
-
-    if not isinstance(rv, text_type):
-        rv = rv.decode("utf-8")
-
-    if for_qs:
-        rv = rv.replace("%20", "+")
-
-    return rv
-
-
-class LRUCache(object):
-    """A simple LRU Cache implementation."""
-
-    # this is fast for small capacities (something below 1000) but doesn't
-    # scale.  But as long as it's only used as storage for templates this
-    # won't do any harm.
-
-    def __init__(self, capacity):
-        self.capacity = capacity
-        self._mapping = {}
-        self._queue = deque()
-        self._postinit()
-
-    def _postinit(self):
-        # alias all queue methods for faster lookup
-        self._popleft = self._queue.popleft
-        self._pop = self._queue.pop
-        self._remove = self._queue.remove
-        self._wlock = Lock()
-        self._append = self._queue.append
-
-    def __getstate__(self):
-        return {
-            "capacity": self.capacity,
-            "_mapping": self._mapping,
-            "_queue": self._queue,
-        }
-
-    def __setstate__(self, d):
-        self.__dict__.update(d)
-        self._postinit()
-
-    def __getnewargs__(self):
-        return (self.capacity,)
-
-    def copy(self):
-        """Return a shallow copy of the instance."""
-        rv = self.__class__(self.capacity)
-        rv._mapping.update(self._mapping)
-        rv._queue.extend(self._queue)
-        return rv
-
-    def get(self, key, default=None):
-        """Return an item from the cache dict or `default`"""
-        try:
-            return self[key]
-        except KeyError:
-            return default
-
-    def setdefault(self, key, default=None):
-        """Set `default` if the key is not in the cache otherwise
-        leave unchanged. Return the value of this key.
-        """
-        try:
-            return self[key]
-        except KeyError:
-            self[key] = default
-            return default
-
-    def clear(self):
-        """Clear the cache."""
-        self._wlock.acquire()
-        try:
-            self._mapping.clear()
-            self._queue.clear()
-        finally:
-            self._wlock.release()
-
-    def __contains__(self, key):
-        """Check if a key exists in this cache."""
-        return key in self._mapping
-
-    def __len__(self):
-        """Return the current size of the cache."""
-        return len(self._mapping)
-
-    def __repr__(self):
-        return "<%s %r>" % (self.__class__.__name__, self._mapping)
-
-    def __getitem__(self, key):
-        """Get an item from the cache. Moves the item up so that it has the
-        highest priority then.
-
-        Raise a `KeyError` if it does not exist.
-        """
-        self._wlock.acquire()
-        try:
-            rv = self._mapping[key]
-            if self._queue[-1] != key:
-                try:
-                    self._remove(key)
-                except ValueError:
-                    # if something removed the key from the container
-                    # when we read, ignore the ValueError that we would
-                    # get otherwise.
-                    pass
-                self._append(key)
-            return rv
-        finally:
-            self._wlock.release()
-
-    def __setitem__(self, key, value):
-        """Sets the value for an item. Moves the item up so that it
-        has the highest priority then.
-        """
-        self._wlock.acquire()
-        try:
-            if key in self._mapping:
-                self._remove(key)
-            elif len(self._mapping) == self.capacity:
-                del self._mapping[self._popleft()]
-            self._append(key)
-            self._mapping[key] = value
-        finally:
-            self._wlock.release()
-
-    def __delitem__(self, key):
-        """Remove an item from the cache dict.
-        Raise a `KeyError` if it does not exist.
-        """
-        self._wlock.acquire()
-        try:
-            del self._mapping[key]
-            try:
-                self._remove(key)
-            except ValueError:
-                pass
-        finally:
-            self._wlock.release()
-
-    def items(self):
-        """Return a list of items."""
-        result = [(key, self._mapping[key]) for key in list(self._queue)]
-        result.reverse()
-        return result
-
-    def iteritems(self):
-        """Iterate over all items."""
-        warnings.warn(
-            "'iteritems()' will be removed in version 3.0. Use"
-            " 'iter(cache.items())' instead.",
-            DeprecationWarning,
-            stacklevel=2,
-        )
-        return iter(self.items())
-
-    def values(self):
-        """Return a list of all values."""
-        return [x[1] for x in self.items()]
-
-    def itervalue(self):
-        """Iterate over all values."""
-        warnings.warn(
-            "'itervalue()' will be removed in version 3.0. Use"
-            " 'iter(cache.values())' instead.",
-            DeprecationWarning,
-            stacklevel=2,
-        )
-        return iter(self.values())
-
-    def itervalues(self):
-        """Iterate over all values."""
-        warnings.warn(
-            "'itervalues()' will be removed in version 3.0. Use"
-            " 'iter(cache.values())' instead.",
-            DeprecationWarning,
-            stacklevel=2,
-        )
-        return iter(self.values())
-
-    def keys(self):
-        """Return a list of all keys ordered by most recent usage."""
-        return list(self)
-
-    def iterkeys(self):
-        """Iterate over all keys in the cache dict, ordered by
-        the most recent usage.
-        """
-        warnings.warn(
-            "'iterkeys()' will be removed in version 3.0. Use"
-            " 'iter(cache.keys())' instead.",
-            DeprecationWarning,
-            stacklevel=2,
-        )
-        return iter(self)
-
-    def __iter__(self):
-        return reversed(tuple(self._queue))
-
-    def __reversed__(self):
-        """Iterate over the keys in the cache dict, oldest items
-        coming first.
-        """
-        return iter(tuple(self._queue))
-
-    __copy__ = copy
-
-
-abc.MutableMapping.register(LRUCache)
-
-
-def select_autoescape(
-    enabled_extensions=("html", "htm", "xml"),
-    disabled_extensions=(),
-    default_for_string=True,
-    default=False,
-):
-    """Intelligently sets the initial value of autoescaping based on the
-    filename of the template.  This is the recommended way to configure
-    autoescaping if you do not want to write a custom function yourself.
-
-    If you want to enable it for all templates created from strings or
-    for all templates with `.html` and `.xml` extensions::
-
-        from jinja2 import Environment, select_autoescape
-        env = Environment(autoescape=select_autoescape(
-            enabled_extensions=('html', 'xml'),
-            default_for_string=True,
-        ))
-
-    Example configuration to turn it on at all times except if the template
-    ends with `.txt`::
-
-        from jinja2 import Environment, select_autoescape
-        env = Environment(autoescape=select_autoescape(
-            disabled_extensions=('txt',),
-            default_for_string=True,
-            default=True,
-        ))
-
-    The `enabled_extensions` is an iterable of all the extensions that
-    autoescaping should be enabled for.  Likewise `disabled_extensions` is
-    a list of all templates it should be disabled for.  If a template is
-    loaded from a string then the default from `default_for_string` is used.
-    If nothing matches then the initial value of autoescaping is set to the
-    value of `default`.
-
-    For security reasons this function operates case insensitive.
-
-    .. versionadded:: 2.9
-    """
-    enabled_patterns = tuple("." + x.lstrip(".").lower() for x in enabled_extensions)
-    disabled_patterns = tuple("." + x.lstrip(".").lower() for x in disabled_extensions)
-
-    def autoescape(template_name):
-        if template_name is None:
-            return default_for_string
-        template_name = template_name.lower()
-        if template_name.endswith(enabled_patterns):
-            return True
-        if template_name.endswith(disabled_patterns):
-            return False
-        return default
-
-    return autoescape
-
-
-def htmlsafe_json_dumps(obj, dumper=None, **kwargs):
-    """Works exactly like :func:`dumps` but is safe for use in ``<script>``
-    tags.  It accepts the same arguments and returns a JSON string.  Note that
-    this is available in templates through the ``|tojson`` filter which will
-    also mark the result as safe.  Due to how this function escapes certain
-    characters this is safe even if used outside of ``<script>`` tags.
-
-    The following characters are escaped in strings:
-
-    -   ``<``
-    -   ``>``
-    -   ``&``
-    -   ``'``
-
-    This makes it safe to embed such strings in any place in HTML with the
-    notable exception of double quoted attributes.  In that case single
-    quote your attributes or HTML escape it in addition.
-    """
-    if dumper is None:
-        dumper = json.dumps
-    rv = (
-        dumper(obj, **kwargs)
-        .replace(u"<", u"\\u003c")
-        .replace(u">", u"\\u003e")
-        .replace(u"&", u"\\u0026")
-        .replace(u"'", u"\\u0027")
-    )
-    return Markup(rv)
-
-
-class Cycler(object):
-    """Cycle through values by yield them one at a time, then restarting
-    once the end is reached. Available as ``cycler`` in templates.
-
-    Similar to ``loop.cycle``, but can be used outside loops or across
-    multiple loops. For example, render a list of folders and files in a
-    list, alternating giving them "odd" and "even" classes.
-
-    .. code-block:: html+jinja
-
-        {% set row_class = cycler("odd", "even") %}
-        <ul class="browser">
-        {% for folder in folders %}
-          <li class="folder {{ row_class.next() }}">{{ folder }}
-        {% endfor %}
-        {% for file in files %}
-          <li class="file {{ row_class.next() }}">{{ file }}
-        {% endfor %}
-        </ul>
-
-    :param items: Each positional argument will be yielded in the order
-        given for each cycle.
-
-    .. versionadded:: 2.1
-    """
-
-    def __init__(self, *items):
-        if not items:
-            raise RuntimeError("at least one item has to be provided")
-        self.items = items
-        self.pos = 0
-
-    def reset(self):
-        """Resets the current item to the first item."""
-        self.pos = 0
-
-    @property
-    def current(self):
-        """Return the current item. Equivalent to the item that will be
-        returned next time :meth:`next` is called.
-        """
-        return self.items[self.pos]
-
-    def next(self):
-        """Return the current item, then advance :attr:`current` to the
-        next item.
-        """
-        rv = self.current
-        self.pos = (self.pos + 1) % len(self.items)
-        return rv
-
-    __next__ = next
-
-
-class Joiner(object):
-    """A joining helper for templates."""
-
-    def __init__(self, sep=u", "):
-        self.sep = sep
-        self.used = False
-
-    def __call__(self):
-        if not self.used:
-            self.used = True
-            return u""
-        return self.sep
-
-
-class Namespace(object):
-    """A namespace object that can hold arbitrary attributes.  It may be
-    initialized from a dictionary or with keyword arguments."""
-
-    def __init__(*args, **kwargs):  # noqa: B902
-        self, args = args[0], args[1:]
-        self.__attrs = dict(*args, **kwargs)
-
-    def __getattribute__(self, name):
-        # __class__ is needed for the awaitable check in async mode
-        if name in {"_Namespace__attrs", "__class__"}:
-            return object.__getattribute__(self, name)
-        try:
-            return self.__attrs[name]
-        except KeyError:
-            raise AttributeError(name)
-
-    def __setitem__(self, name, value):
-        self.__attrs[name] = value
-
-    def __repr__(self):
-        return "<Namespace %r>" % self.__attrs
-
-
-# does this python version support async for in and async generators?
-try:
-    exec("async def _():\n async for _ in ():\n  yield _")
-    have_async_gen = True
-except SyntaxError:
-    have_async_gen = False
-
-
-def soft_unicode(s):
-    from markupsafe import soft_unicode
-
-    warnings.warn(
-        "'jinja2.utils.soft_unicode' will be removed in version 3.0."
-        " Use 'markupsafe.soft_unicode' instead.",
-        DeprecationWarning,
-        stacklevel=2,
-    )
-    return soft_unicode(s)