我需要渲染一个字符串模板，该模板具有以数字开头的标签，并且出现以下异常： jinja2.exceptions.TemplateSyntaxError：预期令牌“打印语句结束”，得到了“ d_printer_name”

>>> jinja2.__version__
'2.10.3'
>>> flask.__version__
'1.1.1'

hello.py ：

from flask import flask,render_template_string

app = flask(__name__)

@app.route("/")
def hello():
    render_data = { "3d_printer_name": "A name for printer"}
    rendered = render_template_string("Name: {{ 3d_printer_name}}.",**render_data)

    return rendered

我还尝试放置{％autoescape false％}标签，但问题仍然存在。

欢迎任何帮助！

这是回溯：

[2019-11-07 14:11:50,609] ERROR in app: Exception on / [GET]
Traceback (most recent call last):
  File "/site-packages/flask/app.py",line 2446,in wsgi_app
    response = self.full_dispatch_request()
  File "/site-packages/flask/app.py",line 1951,in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/site-packages/flask/app.py",line 1820,in handle_user_exception
    reraise(exc_type,exc_value,tb)
  File "/site-packages/flask/_compat.py",line 39,in reraise
    raise value
  File "/site-packages/flask/app.py",line 1949,in full_dispatch_request
    rv = self.dispatch_request()
  File "/site-packages/flask/app.py",line 1935,in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/Users/mgieco/Developments/tmp/flask_render/hello.py",line 8,in hello
    decoration = render_template_string("Name: {{ 3d_printer_name}}.",**decoration_data)
  File "/site-packages/flask/templating.py",line 155,in render_template_string
    return _render(ctx.app.jinja_env.from_string(source),context,ctx.app)
  File "/site-packages/jinja2/environment.py",line 880,in from_string
    return cls.from_code(self,self.compile(source),globals,None)
  File "/site-packages/jinja2/environment.py",line 591,in compile
    self.handle_exception(exc_info,source_hint=source_hint)
  File "/site-packages/jinja2/environment.py",line 780,in handle_exception
    reraise(exc_type,tb)
  File "/site-packages/jinja2/_compat.py",line 37,in reraise
    raise value.with_traceback(tb)
  File "<unknown>",line 1,in template
  File "/site-packages/jinja2/environment.py",line 497,in _parse
    return Parser(self,source,name,encode_filename(filename)).parse()
  File "/site-packages/jinja2/parser.py",line 901,in parse
    result = nodes.Template(self.subparse(),lineno=1)
  File "/site-packages/jinja2/parser.py",line 876,in subparse
    self.stream.expect('variable_end')
  File "/site-packages/jinja2/lexer.py",line 384,in expect
    self.name,self.filename)
jinja2.exceptions.TemplateSyntaxError: expected token 'end of print statement',got 'd_printer_name'
127.0.0.1 - - [07/Nov/2019 14:11:50] "GET / HTTP/1.1" 500 -