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TemplateNotFound: index.html with Google App Engine and Jinja2

I am trying to create my first GAE application with jinja2. After overcoming a dozen minor bugs, now I'm stuck with this:

Traceback (last last call):

File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2\webapp2.py", line 1536, in __call__
    rv = self.handle_exception(request, response, e)
  File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2\webapp2.py", line 1530, in __call__
    rv = self.router.dispatch(request, response)
  File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2\webapp2.py", line 1278, in default_dispatcher
    return route.handler_adapter(request, response)
  File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2\webapp2.py", line 1102, in __call__
    return handler.dispatch()
  File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2\webapp2.py", line 572, in dispatch
    return self.handle_exception(e, self.app.debug)
  File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2\webapp2.py", line 570, in dispatch
    return method(*args, **kwargs)
  File "C:\Users\CG\Documents\udacity\HiMon\main.py", line 31, in get
    template = jinja_environment.get_template('index.html')
  File "C:\Program Files (x86)\Google\google_appengine\lib\jinja2\jinja2\environment.py", line 719, in get_template
    return self._load_template(name, self.make_globals(globals))
  File "C:\Program Files (x86)\Google\google_appengine\lib\jinja2\jinja2\environment.py", line 693, in _load_template
    template = self.loader.load(self, name, globals)
  File "C:\Program Files (x86)\Google\google_appengine\lib\jinja2\jinja2\loaders.py", line 115, in load
    source, filename, uptodate = self.get_source(environment, name)
  File "C:\Program Files (x86)\Google\google_appengine\lib\jinja2\jinja2\loaders.py", line 180, in get_source
    raise TemplateNotFound(template)
TemplateNotFound: index.html

Here is my yaml file:

application: himother
version: 1
runtime: python27
api_version: 1
threadsafe: yes

handlers:
- url: /favicon\.ico
  static_files: favicon.ico
  upload: favicon\.ico

- url: .*
  script: main.app

libraries:
- name: webapp2
  version: "2.5.1"
- name: jinja2
  version: "2.6"

Here is my code:

import os
import webapp2

import jinja2

jinja_environment = jinja2.Environment(autoescape=True,
    loader=jinja2.FileSystemLoader(os.path.join(os.path.dirname(__file__), 'templates')))

class MainPage(webapp2.RequestHandler):
    def get(self):
        template_values = {
            'name': 'Serendipo',
            'verb': 'extremely happy'
        }

        template = jinja_environment.get_template('index.html')
        self.response.out.write(template.render(template_values))

app = webapp2.WSGIApplication([('/', MainPage)],
                              debug=True)

Here is my .html template:

<!DOCTYPE html>
<html>
    <head>
        <title>Look Ma, I'm using Jinja!</title>
    </head>
    <body>
        Hi there - I'm {{ name }}, and I {{ verb }} programming!
    </body>
</html>

Despite the error message, I have a folder called "templates" and an index.html file is created inside it:

enter image description here

enter image description here

enter image description here

I also installed jinja2.

Does anyone know the cause of this error?

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4 answers

You should probably use the version jinja2included in webapp2_extras.

: http://webapp-improved.appspot.com/api/webapp2_extras/jinja2.html#webapp2_extras.jinja2.Jinja2

, jinja2.Environment ...

from webapp2_extras import jinja2
jinja = jinja2.get_jinja2(app=self.app)
jinja.render_template("index.html")

, jinja2 libraries app.yaml:

libraries:                                                                      
- name: jinja2                                                                  
  version: "2.6"
+5

. , , .

jinja_environment = jinja2.Environment(autoescape=True,
    loader=jinja2.FileSystemLoader(os.path.join(os.path.dirname(__file__), 'templates')))

class MainPage(webapp2.RequestHandler):
    def get(self):
        template_values = {
            'name': 'Serendipo',
            'verb': 'extremely happy'
        }

        template = jinja_environment.get_template('index.html')
        self.response.out.write(template.render(template_values))

"jinja_environment" [, "" ]. index.html, :

template = jinja_environment.get_template('templates/index.html')

, (, autoescape = True), , ).

, , [, 'templates], "/" "index.html", "/index.html", .

+2

webapp2_extras, [1], , . logging.info(jinja2.default_config). , - app-yaml-dir/templates/('template_path': 'templates'). , . reset , .

jinja2.default_config['template_path'] = "html"

, render_response('module/home.html', **context)

jinja2.default_config['template_path'] = ""
+2

jinja_environment = jinja2.Environment(autoescape=True, loader=jinja2.FileSystemLoader(os.path.join(os.path.dirname(__file__), 'templates'))) In fact, the line in your code means that you are directing your request to the templates folder, but it looks like you did not save your "index.html" in the templates folder, so just delete the redirection or move the index file to the templates folder.

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