python - 我正在使用 Flask 并出现错误，你能帮帮我吗？

Question

from flask import Flask, render_template

app = Flask(__name__)


@app.route("/")
def index():
    return render_template("index(1).html")


if __name__ == "__main__":
    app.run(debug=True)

下面是错误

我无法解决它，因为它对我来说非常复杂和困难

我确实导入了所有需要的模块

我确实写了 localhost true

我正确地写了 html 文件的名称

如果您需要有关代码的更多信息，我会给您。

我重新格式化文件一次

感谢所有 Stackoverflow 社区的帮助:)

C:\Users\90551\PycharmProjects\DövizUygulaması\venv\Scripts\python.exe C:/Users/90551/PycharmProjects/DövizUygulaması/github.py
 * Serving Flask app "github" (lazy loading)
 * Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: on
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 251-045-188
 * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
127.0.0.1 - - [28/Aug/2020 16:04:57] "GET / HTTP/1.1" 500 -
Traceback (most recent call last):
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\app.py", line 2464, in __call__
    return self.wsgi_app(environ, start_response)
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\app.py", line 2450, in wsgi_app
    response = self.handle_exception(e)
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\app.py", line 1867, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\_compat.py", line 39, in reraise
    raise value
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\app.py", line 2447, in wsgi_app
    response = self.full_dispatch_request()
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\app.py", line 1952, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\app.py", line 1821, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\_compat.py", line 39, in reraise
    raise value
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\app.py", line 1950, in full_dispatch_request
    rv = self.dispatch_request()
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\app.py", line 1936, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\github.py", line 8, in index
    return render_template("index.html")
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\templating.py", line 138, in render_template
    ctx.app.jinja_env.get_or_select_template(template_name_or_list),
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\jinja2\environment.py", line 930, in get_or_select_template
    return self.get_template(template_name_or_list, parent, globals)
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\jinja2\environment.py", line 883, in get_template
    return self._load_template(name, self.make_globals(globals))
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\jinja2\environment.py", line 857, in _load_template
    template = self.loader.load(self, name, globals)
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\jinja2\loaders.py", line 115, in load
    source, filename, uptodate = self.get_source(environment, name)
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\templating.py", line 60, in get_source
    return self._get_source_fast(environment, template)
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\templating.py", line 89, in _get_source_fast
    raise TemplateNotFound(template)
jinja2.exceptions.TemplateNotFound: index.html
127.0.0.1 - - [28/Aug/2020 16:04:57] "GET /?__debugger__=yes&cmd=resource&f=style.css HTTP/1.1" 200 -
127.0.0.1 - - [28/Aug/2020 16:04:57] "GET /?__debugger__=yes&cmd=resource&f=debugger.js HTTP/1.1" 200 -
127.0.0.1 - - [28/Aug/2020 16:04:57] "GET /?__debugger__=yes&cmd=resource&f=jquery.js HTTP/1.1" 200 -
127.0.0.1 - - [28/Aug/2020 16:04:57] "GET /?__debugger__=yes&cmd=resource&f=ubuntu.ttf HTTP/1.1" 200 -
127.0.0.1 - - [28/Aug/2020 16:04:58] "GET /?__debugger__=yes&cmd=resource&f=console.png HTTP/1.1" 200 -
127.0.0.1 - - [28/Aug/2020 16:04:58] "GET /?__debugger__=yes&cmd=resource&f=console.png HTTP/1.1" 200 -
127.0.0.1 - - [28/Aug/2020 16:04:58] "GET / HTTP/1.1" 500 -
Traceback (most recent call last):
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\app.py", line 2464, in __call__
    return self.wsgi_app(environ, start_response)
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\app.py", line 2450, in wsgi_app
    response = self.handle_exception(e)
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\app.py", line 1867, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\_compat.py", line 39, in reraise
    raise value
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\app.py", line 2447, in wsgi_app
    response = self.full_dispatch_request()
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\app.py", line 1952, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\app.py", line 1821, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\_compat.py", line 39, in reraise
    raise value
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\app.py", line 1950, in full_dispatch_request
    rv = self.dispatch_request()
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\app.py", line 1936, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\github.py", line 8, in index
    return render_template("index.html")
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\templating.py", line 138, in render_template
    ctx.app.jinja_env.get_or_select_template(template_name_or_list),
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\jinja2\environment.py", line 930, in get_or_select_template
    return self.get_template(template_name_or_list, parent, globals)
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\jinja2\environment.py", line 883, in get_template
    return self._load_template(name, self.make_globals(globals))
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\jinja2\environment.py", line 857, in _load_template
    template = self.loader.load(self, name, globals)
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\jinja2\loaders.py", line 115, in load
    source, filename, uptodate = self.get_source(environment, name)
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\templating.py", line 60, in get_source
    return self._get_source_fast(environment, template)
  File "C:\Users\90551\PycharmProjects\DövizUygulaması\venv\lib\site-packages\flask\templating.py", line 89, in _get_source_fast
    raise TemplateNotFound(template)
jinja2.exceptions.TemplateNotFound: index.html
127.0.0.1 - - [28/Aug/2020 16:04:59] "GET /?__debugger__=yes&cmd=resource&f=style.css HTTP/1.1" 200 -
127.0.0.1 - - [28/Aug/2020 16:04:59] "GET /?__debugger__=yes&cmd=resource&f=jquery.js HTTP/1.1" 200 -
127.0.0.1 - - [28/Aug/2020 16:04:59] "GET /?__debugger__=yes&cmd=resource&f=debugger.js HTTP/1.1" 200 -
127.0.0.1 - - [28/Aug/2020 16:04:59] "GET /?__debugger__=yes&cmd=resource&f=ubuntu.ttf HTTP/1.1" 200 -
127.0.0.1 - - [28/Aug/2020 16:04:59] "GET /?__debugger__=yes&cmd=resource&f=console.png HTTP/1.1" 200 -

标签： pythonpython-3.xflask

Answer 1

TL;博士

嗯，由于某种原因，Flask 似乎正在尝试加载index.html而不是index(1).html.

该怎么办？

将文件重命名index(1).html为index.html，并验证index.html文件是否在templates目录中，并且该templates目录与 python 脚本位于同一目录中。然后，更改您的代码以反映这一点：

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

然后完全重新运行您的脚本，一切都应该工作！如果这不起作用，请随时联系！我是来帮忙的！