我正在尝试使用Flask创建一个示例应用程序 . 一切都很好，但问题从无处发生 .

我的追溯和源文件附加到这篇文章 . 我想提一下，我已经尝试改变行结束格式（类UNIX，类似Windows）和编码（ANSI，UTF-8，UTF-8无BOM） .

Traceback (most recent call last):
  File "C:\Python27\MyProject\venv\Lib\site-packages\flask\app.py", line 1836, in __call__
  File "C:\Python27\MyProject\venv\Lib\site-packages\flask\app.py", line 1820, in wsgi_app
  File "C:\Python27\MyProject\venv\Lib\site-packages\flask\app.py", line 1403, in handle_exception
  File "C:\Python27\MyProject\venv\Lib\site-packages\flask\app.py", line 1817, in wsgi_app
  File "C:\Python27\MyProject\venv\Lib\site-packages\flask\app.py", line 1477, in full_dispatch_request
  File "C:\Python27\MyProject\venv\Lib\site-packages\flask\app.py", line 1381, in handle_user_exception
  File "C:\Python27\MyProject\venv\Lib\site-packages\flask\app.py", line 1475, in full_dispatch_request
  File "C:\Python27\MyProject\venv\Lib\site-packages\flask\app.py", line 1461, in dispatch_request
  File "c:\Python27\MyProject\runserver.py", line 22, in index
    return render_template('index.html')
  File "C:\Python27\MyProject\venv\Lib\site-packages\flask\templating.py", line 127, in render_template
  File "C:\Python27\MyProject\venv\Lib\site-packages\jinja2\environment.py", line 830, in get_or_select_template
  File "C:\Python27\MyProject\venv\Lib\site-packages\jinja2\environment.py", line 791, in get_template
  File "C:\Python27\MyProject\venv\Lib\site-packages\jinja2\environment.py", line 765, in _load_template
  File "C:\Python27\MyProject\venv\Lib\site-packages\jinja2\loaders.py", line 125, in load
  File "C:\Python27\MyProject\venv\Lib\site-packages\jinja2\environment.py", line 554, in compile
  File "C:\Python27\MyProject\venv\Lib\site-packages\jinja2\environment.py", line 742, in handle_exception
  File "c:\Python27\MyProject\templates\index.html", line 1, in template
    {% extends "base.html" %}
TemplateSyntaxError: unicode-escape

这是我的runserver.py：

# -*- coding: utf-8 -*-
import os
from flask import Flask, render_template, send_from_directory, url_for

# initialization
app = Flask(__name__)
app.config.update(
    DEBUG = True,
)

# controllers
@app.route('/favicon.ico')
def favicon():
    return send_from_directory(os.path.join(app.root_path, 'static'), 'ico/favicon.ico')

@app.errorhandler(404)
def page_not_found(e):
    return render_template('404.html'), 404

@app.route("/")
def index():
    return render_template('index.html')

@app.route("/base")
def base():
    return render_template('base.html')

# launch
if __name__ == "__main__":
    port = int(os.environ.get("PORT", 5000))
    app.run(host='0.0.0.0', port=port)

这是我的模板：

base.html

<!doctype html>
    <html>
      <head>
        {% block head %}
        {# <link rel="stylesheet" href="{{ url_for('static', filename='style.css') }}"> #}
        <title>{% block title %}{% endblock %} - My Webpage</title>
        {% endblock %}
      </head>
      <body>
        <div id="content">{% block content %}{% endblock %}</div>
        <div id="footer">
          {% block footer %}
          &copy; Copyright 2010 by <a href="http://domain.invalid/">you</a>.
          {% endblock %}
        </div>
      </body>
    </html>

和 index.html

{% extends "base.html" %}
{% block title %} - Home{% endblock %}
{% block content %}
{% if not session.logged_in %}
     <p>You are not logged in.</p>
{% else %}
     <p>You are logged in.</p>
{% endif %}
{% endblock %}
python flask jinja2