How to use the chameleon.ast25 function in Chameleon

def require(self, value):
        if value is None:
            return load("None")

        if isinstance(value, NATIVE_NUMBERS):
            return ast.Num(value)

        node = self.imports.get(value)
        if node is None:
            # we come up with a unique symbol based on the class name
            name = "_%s" % getattr(value, '__name__', str(value)).\
                   rsplit('.', 1)[-1]
            node = load(name)
            self.imports[value] = store(node.id)

        return node

self.lines = []

        while self.imports:
            value, node = self.imports.popitem()

            if isinstance(value, types.ModuleType):
                stmt = ast.Import(
                    names=[ast.alias(name=value.__name__, asname=node.id)])
            elif hasattr(value, '__name__'):
                path = reverse_builtin_map.get(value)
                if path is None:
                    path = value.__module__
                    name = value.__name__
                stmt = ast.ImportFrom(
                    module=path,
                    names=[ast.alias(name=name, asname=node.id)],
                    level=0,
                )
            else:
                raise TypeError(value)

            self.visit(stmt)

        # Clear last import
        self.flush()

        # Stich together lines
        self.lines += defines + body

def wrapper(*vargs, **kwargs):
        symbols = dict(zip(args, vargs + defaults))
        symbols.update(kwargs)

        class Visitor(ast.NodeVisitor):
            def visit_FunctionDef(self, node):
                self.generic_visit(node)

                name = symbols.get(node.name, self)
                if name is not self:
                    node_annotations[node] = ast.FunctionDef(
                        name=name,
                        args=node.args,
                        body=node.body,
                        decorator_list=getattr(node, "decorator_list", []),
                        )

            def visit_Name(self, node):
                value = symbols.get(node.id, self)
                if value is not self:
                    if isinstance(value, basestring):

self._write('yield')
        if getattr(node, 'value', None):
            self._write(' ')
            self.visit(node.value)

    comparison_operators = {
        ast.Eq: '==',
        ast.NotEq: '!=',
        ast.Lt: '<',
        ast.LtE: '<=',
        ast.Gt: '>',
        ast.GtE: '>=',
        ast.Is: 'is',
        ast.IsNot: 'is not',
        ast.In: 'in',
        ast.NotIn: 'not in',
    }

    # Compare(expr left, cmpop* ops, expr* comparators)
    @with_parens
    def visit_Compare(self, node):
        self.visit(node.left)
        for op, comparator in zip(node.ops, node.comparators):
            self._write(' ' + self.comparison_operators[op.__class__] + ' ')
            self.visit(comparator)

    # Call(expr func, expr* args, keyword* keywords,
    #                         expr? starargs, expr? kwargs)
    def visit_Call(self, node):
        self.visit(node.func)
        self._write('(')
        first = True

name, node = self.defines.popitem()
            assignment = ast.Assign(targets=[store(name)], value=node)
            self.visit(assignment)

        # Make sure we terminate the line printer
        self.flush()

        # Clear lines array for import visits
        defines = self.lines
        self.lines = []

        while self.imports:
            value, node = self.imports.popitem()

            if isinstance(value, types.ModuleType):
                stmt = ast.Import(
                    names=[ast.alias(name=value.__name__, asname=node.id)])
            elif hasattr(value, '__name__'):
                path = reverse_builtin_map.get(value)
                if path is None:
                    path = value.__module__
                    name = value.__name__
                stmt = ast.ImportFrom(
                    module=path,
                    names=[ast.alias(name=name, asname=node.id)],
                    level=0,
                )
            else:
                raise TypeError(value)

            self.visit(stmt)

# Clear lines array for import visits
        defines = self.lines
        self.lines = []

        while self.imports:
            value, node = self.imports.popitem()

            if isinstance(value, types.ModuleType):
                stmt = ast.Import(
                    names=[ast.alias(name=value.__name__, asname=node.id)])
            elif hasattr(value, '__name__'):
                path = reverse_builtin_map.get(value)
                if path is None:
                    path = value.__module__
                    name = value.__name__
                stmt = ast.ImportFrom(
                    module=path,
                    names=[ast.alias(name=name, asname=node.id)],
                    level=0,
                )
            else:
                raise TypeError(value)

            self.visit(stmt)

        # Clear last import
        self.flush()

        # Stich together lines
        self.lines += defines + body

lambda attribute:
                        isinstance(attribute, nodes.Attribute) and
                        isinstance(attribute.expression, ast.Str)
                    )

"""Support classes for generating code from abstract syntax trees."""

try:
    import ast
except ImportError:
    from chameleon import ast25 as ast

import sys
import logging
import weakref
import collections

node_annotations = weakref.WeakKeyDictionary()

try:
    node_annotations[ast.Name()] = None
except TypeError:
    logging.debug(
        "Unable to create weak references to AST nodes. " \
        "A lock will be used around compilation loop."
        )

    node_annotations = {}

__docformat__ = 'restructuredtext en'


def annotated(value):
    node = load("annotation")
    node_annotations[node] = value
    return node

from ..exc import ParseError
from ..exc import CompilationError

from ..utils import decode_htmlentities

try:
    str = unicode
except NameError:
    long = int


missing = object()

re_trim = re.compile(r'($\s+|\s+^)', re.MULTILINE)

EMPTY_DICT = Static(ast.Dict(keys=[], values=[]))


def skip(node):
    return node


def wrap(node, *wrappers):
    for wrapper in reversed(wrappers):
        node = wrapper(node)
    return node


def validate_attributes(attributes, namespace, whitelist):
    for ns, name in attributes:
        if ns == namespace and name not in whitelist:
            raise CompilationError(

def __getattr__(self, name):
        if name.startswith('__'):
            raise AttributeError(name)
        return _ast.__dict__.get(name) or getattr(_ast, self.aliases[name])