Python nodes.List方法代码示例

# 需要导入模块: from jinja2 import nodes [as 别名]
# 或者: from jinja2.nodes import List [as 别名]
def parse(self, parser):
        stream = parser.stream
        tag = stream.next()
        # get arguments
        args = []
        kwargs = []
        while not stream.current.test_any('block_end'):
            if args or kwargs:
                stream.expect('comma')
            if stream.current.test('name') and stream.look().test('assign'):
                key = nodes.Const(stream.next().value)
                stream.skip()
                value = parser.parse_expression()
                kwargs.append(nodes.Pair(key, value, lineno=key.lineno))
            else:
                args.append(parser.parse_expression())

        def make_call_node(*kw):
            return self.call_method('_call', args=[
                nodes.List(args),
                nodes.Dict(kwargs),
            ], kwargs=kw)

        return nodes.Output([make_call_node()]).set_lineno(tag.lineno) 

# 需要导入模块: from jinja2 import nodes [as 别名]
# 或者: from jinja2.nodes import List [as 别名]
def parse_list(self):
        token = self.stream.expect('lbracket')
        items = []
        while self.stream.current.type != 'rbracket':
            if items:
                self.stream.expect('comma')
            if self.stream.current.type == 'rbracket':
                break
            items.append(self.parse_expression())
        self.stream.expect('rbracket')
        return nodes.List(items, lineno=token.lineno) 

# 需要导入模块: from jinja2 import nodes [as 别名]
# 或者: from jinja2.nodes import List [as 别名]
def parse(self, parser):
        lineno = next(parser.stream).lineno

        #: Parse timeout
        args = [parser.parse_expression()]

        #: Parse fragment name
        #: Grab the fragment name if it exists
        #: otherwise, default to the old method of using the templates
        #: lineno to maintain backwards compatibility.
        if parser.stream.skip_if('comma'):
            args.append(parser.parse_expression())
        else:
            args.append(nodes.Const("%s%s" % (parser.filename, lineno)))

        #: Parse vary_on parameters
        vary_on = []
        while parser.stream.skip_if('comma'):
            vary_on.append(parser.parse_expression())

        if vary_on:
            args.append(nodes.List(vary_on))
        else:
            args.append(nodes.Const([]))

        body = parser.parse_statements(['name:endcache'], drop_needle=True)
        return nodes.CallBlock(self.call_method('_cache', args),
                               [], [], body).set_lineno(lineno) 

# 需要导入模块: from jinja2 import nodes [as 别名]
# 或者: from jinja2.nodes import List [as 别名]
def visit_Include(self, node, frame):
        """Handles includes."""
        if node.ignore_missing:
            self.writeline('try:')
            self.indent()

        func_name = 'get_or_select_template'
        if isinstance(node.template, nodes.Const):
            if isinstance(node.template.value, string_types):
                func_name = 'get_template'
            elif isinstance(node.template.value, (tuple, list)):
                func_name = 'select_template'
        elif isinstance(node.template, (nodes.Tuple, nodes.List)):
            func_name = 'select_template'

        self.writeline('template = environment.%s(' % func_name, node)
        self.visit(node.template, frame)
        self.write(', %r)' % self.name)
        if node.ignore_missing:
            self.outdent()
            self.writeline('except TemplateNotFound:')
            self.indent()
            self.writeline('pass')
            self.outdent()
            self.writeline('else:')
            self.indent()

        skip_event_yield = False
        if node.with_context:
            loop = self.environment.is_async and 'async for' or 'for'
            self.writeline('%s event in template.root_render_func('
                           'template.new_context(context.get_all(), True, '
                           '%s)):' % (loop, self.dump_local_context(frame)))
        elif self.environment.is_async:
            self.writeline('for event in (await '
                           'template._get_default_module_async())'
                           '._body_stream:')
        else:
            if supports_yield_from:
                self.writeline('yield from template._get_default_module()'
                               '._body_stream')
                skip_event_yield = True
            else:
                self.writeline('for event in template._get_default_module()'
                               '._body_stream:')

        if not skip_event_yield:
            self.indent()
            self.simple_write('event', frame)
            self.outdent()

        if node.ignore_missing:
            self.outdent() 

# 需要导入模块: from jinja2 import nodes [as 别名]
# 或者: from jinja2.nodes import List [as 别名]
def find_referenced_templates(ast):
    """Finds all the referenced templates from the AST.  This will return an
    iterator over all the hardcoded template extensions, inclusions and
    imports.  If dynamic inheritance or inclusion is used, `None` will be
    yielded.

    >>> from jinja2 import Environment, meta
    >>> env = Environment()
    >>> ast = env.parse('{% extends "layout.html" %}{% include helper %}')
    >>> list(meta.find_referenced_templates(ast))
    ['layout.html', None]

    This function is useful for dependency tracking.  For example if you want
    to rebuild parts of the website after a layout template has changed.
    """
    for node in ast.find_all((nodes.Extends, nodes.FromImport, nodes.Import,
                              nodes.Include)):
        if not isinstance(node.template, nodes.Const):
            # a tuple with some non consts in there
            if isinstance(node.template, (nodes.Tuple, nodes.List)):
                for template_name in node.template.items:
                    # something const, only yield the strings and ignore
                    # non-string consts that really just make no sense
                    if isinstance(template_name, nodes.Const):
                        if isinstance(template_name.value, string_types):
                            yield template_name.value
                    # something dynamic in there
                    else:
                        yield None
            # something dynamic we don't know about here
            else:
                yield None
            continue
        # constant is a basestring, direct template name
        if isinstance(node.template.value, string_types):
            yield node.template.value
        # a tuple or list (latter *should* not happen) made of consts,
        # yield the consts that are strings.  We could warn here for
        # non string values
        elif isinstance(node, nodes.Include) and \
             isinstance(node.template.value, (tuple, list)):
            for template_name in node.template.value:
                if isinstance(template_name, string_types):
                    yield template_name
        # something else we don't care about, we could warn here
        else:
            yield None