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flask 서버 만들기 index_html return
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* 겪고 있는 문제 상황을 최대한 자세하게 작성해주세요.

* 문제 해결을 위해 어떤 시도를 해보았는지 구체적으로 함께 알려주세요.


전까지 잘 되고 있었는데 return render_template ('index_html')

이걸 쓰니까 localhost 페이지가 이상하게 나와요!




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작성한 코드 및 에러 메세지

오류 발생 시, 작성한 코드 전체와 에러 메시지를 첨부해 주세요.

Tip 1) </> 아이콘을 눌러 코드박스를 만들어 보세요.

Tip 2) Ctrl+A(맥의 경우 Command+A) 단축키로 코드를 한 번에 선택할 수 있어요!



에러메세지

C:\Users\koyej\Desktop\sparta\projects\prac\venv\Scripts\python.exe C:/Users/koyej/Desktop/sparta/projects/prac/app.py
 * Serving Flask app 'app'
 * Debug mode: on
WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
 * Running on all addresses (0.0.0.0)
 * Running on http://127.0.0.1:5000
 * Running on http://172.30.1.65:5000
Press CTRL+C to quit
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 141-792-467
127.0.0.1 - - [08/Nov/2022 18:18:10] "GET / HTTP/1.1" 500 -
Traceback (most recent call last):
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 2548, in __call__
    return self.wsgi_app(environ, start_response)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 2528, in wsgi_app
    response = self.handle_exception(e)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 2525, in wsgi_app
    response = self.full_dispatch_request()
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 1822, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 1820, in full_dispatch_request
    rv = self.dispatch_request()
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 1796, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\app.py", line 6, in home
    return render_template('index_html')
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\templating.py", line 146, in render_template
    template = app.jinja_env.get_or_select_template(template_name_or_list)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\jinja2\environment.py", line 1081, in get_or_select_template
    return self.get_template(template_name_or_list, parent, globals)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\jinja2\environment.py", line 1010, in get_template
    return self._load_template(name, globals)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\jinja2\environment.py", line 969, in _load_template
    template = self.loader.load(self, name, self.make_globals(globals))
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\jinja2\loaders.py", line 126, in load
    source, filename, uptodate = self.get_source(environment, name)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\templating.py", line 62, in get_source
    return self._get_source_fast(environment, template)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\templating.py", line 98, in _get_source_fast
    raise TemplateNotFound(template)
jinja2.exceptions.TemplateNotFound: index_html
127.0.0.1 - - [08/Nov/2022 18:18:10] "GET /?__debugger__=yes&cmd=resource&f=style.css HTTP/1.1" 304 -
127.0.0.1 - - [08/Nov/2022 18:18:10] "GET /?__debugger__=yes&cmd=resource&f=debugger.js HTTP/1.1" 304 -
127.0.0.1 - - [08/Nov/2022 18:18:10] "GET /?__debugger__=yes&cmd=resource&f=console.png HTTP/1.1" 304 -
127.0.0.1 - - [08/Nov/2022 18:18:11] "GET /?__debugger__=yes&cmd=resource&f=console.png HTTP/1.1" 304 -
127.0.0.1 - - [08/Nov/2022 18:18:12] "GET / HTTP/1.1" 500 -
Traceback (most recent call last):
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 2548, in __call__
    return self.wsgi_app(environ, start_response)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 2528, in wsgi_app
    response = self.handle_exception(e)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 2525, in wsgi_app
    response = self.full_dispatch_request()
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 1822, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 1820, in full_dispatch_request
    rv = self.dispatch_request()
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 1796, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\app.py", line 6, in home
    return render_template('index_html')
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\templating.py", line 146, in render_template
    template = app.jinja_env.get_or_select_template(template_name_or_list)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\jinja2\environment.py", line 1081, in get_or_select_template
    return self.get_template(template_name_or_list, parent, globals)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\jinja2\environment.py", line 1010, in get_template
    return self._load_template(name, globals)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\jinja2\environment.py", line 969, in _load_template
    template = self.loader.load(self, name, self.make_globals(globals))
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\jinja2\loaders.py", line 126, in load
    source, filename, uptodate = self.get_source(environment, name)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\templating.py", line 62, in get_source
    return self._get_source_fast(environment, template)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\templating.py", line 98, in _get_source_fast
    raise TemplateNotFound(template)
jinja2.exceptions.TemplateNotFound: index_html
127.0.0.1 - - [08/Nov/2022 18:18:12] "GET /?__debugger__=yes&cmd=resource&f=style.css HTTP/1.1" 304 -
127.0.0.1 - - [08/Nov/2022 18:18:12] "GET /?__debugger__=yes&cmd=resource&f=debugger.js HTTP/1.1" 304 -
127.0.0.1 - - [08/Nov/2022 18:18:13] "GET /?__debugger__=yes&cmd=resource&f=console.png HTTP/1.1" 304 -
127.0.0.1 - - [08/Nov/2022 18:18:13] "GET /?__debugger__=yes&cmd=resource&f=console.png HTTP/1.1" 304 -
127.0.0.1 - - [08/Nov/2022 18:18:16] "GET / HTTP/1.1" 500 -
Traceback (most recent call last):
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 2548, in __call__
    return self.wsgi_app(environ, start_response)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 2528, in wsgi_app
    response = self.handle_exception(e)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 2525, in wsgi_app
    response = self.full_dispatch_request()
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 1822, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 1820, in full_dispatch_request
    rv = self.dispatch_request()
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 1796, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\app.py", line 6, in home
    return render_template('index_html')
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\templating.py", line 146, in render_template
    template = app.jinja_env.get_or_select_template(template_name_or_list)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\jinja2\environment.py", line 1081, in get_or_select_template
    return self.get_template(template_name_or_list, parent, globals)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\jinja2\environment.py", line 1010, in get_template
    return self._load_template(name, globals)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\jinja2\environment.py", line 969, in _load_template
    template = self.loader.load(self, name, self.make_globals(globals))
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\jinja2\loaders.py", line 126, in load
    source, filename, uptodate = self.get_source(environment, name)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\templating.py", line 62, in get_source
    return self._get_source_fast(environment, template)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\templating.py", line 98, in _get_source_fast
    raise TemplateNotFound(template)
jinja2.exceptions.TemplateNotFound: index_html
127.0.0.1 - - [08/Nov/2022 18:18:16] "GET /?__debugger__=yes&cmd=resource&f=style.css HTTP/1.1" 304 -
127.0.0.1 - - [08/Nov/2022 18:18:16] "GET /?__debugger__=yes&cmd=resource&f=debugger.js HTTP/1.1" 304 -
127.0.0.1 - - [08/Nov/2022 18:18:16] "GET /?__debugger__=yes&cmd=resource&f=console.png HTTP/1.1" 304 -
127.0.0.1 - - [08/Nov/2022 18:18:17] "GET /?__debugger__=yes&cmd=resource&f=console.png HTTP/1.1" 304 -
127.0.0.1 - - [08/Nov/2022 18:18:31] "GET / HTTP/1.1" 500 -
Traceback (most recent call last):
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 2548, in __call__
    return self.wsgi_app(environ, start_response)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 2528, in wsgi_app
    response = self.handle_exception(e)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 2525, in wsgi_app
    response = self.full_dispatch_request()
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 1822, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 1820, in full_dispatch_request
    rv = self.dispatch_request()
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 1796, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\app.py", line 6, in home
    return render_template('index_html')
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\templating.py", line 146, in render_template
    template = app.jinja_env.get_or_select_template(template_name_or_list)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\jinja2\environment.py", line 1081, in get_or_select_template
    return self.get_template(template_name_or_list, parent, globals)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\jinja2\environment.py", line 1010, in get_template
    return self._load_template(name, globals)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\jinja2\environment.py", line 969, in _load_template
    template = self.loader.load(self, name, self.make_globals(globals))
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\jinja2\loaders.py", line 126, in load
    source, filename, uptodate = self.get_source(environment, name)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\templating.py", line 62, in get_source
    return self._get_source_fast(environment, template)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\templating.py", line 98, in _get_source_fast
    raise TemplateNotFound(template)
jinja2.exceptions.TemplateNotFound: index_html
127.0.0.1 - - [08/Nov/2022 18:18:31] "GET /?__debugger__=yes&cmd=resource&f=style.css HTTP/1.1" 304 -
127.0.0.1 - - [08/Nov/2022 18:18:31] "GET /?__debugger__=yes&cmd=resource&f=debugger.js HTTP/1.1" 304 -
127.0.0.1 - - [08/Nov/2022 18:18:31] "GET /?__debugger__=yes&cmd=resource&f=console.png HTTP/1.1" 304 -
127.0.0.1 - - [08/Nov/2022 18:24:50] "GET / HTTP/1.1" 500 -
Traceback (most recent call last):
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 2548, in __call__
    return self.wsgi_app(environ, start_response)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 2528, in wsgi_app
    response = self.handle_exception(e)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 2525, in wsgi_app
    response = self.full_dispatch_request()
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 1822, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 1820, in full_dispatch_request
    rv = self.dispatch_request()
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\app.py", line 1796, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\app.py", line 6, in home
    return render_template('index_html')
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\templating.py", line 146, in render_template
    template = app.jinja_env.get_or_select_template(template_name_or_list)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\jinja2\environment.py", line 1081, in get_or_select_template
    return self.get_template(template_name_or_list, parent, globals)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\jinja2\environment.py", line 1010, in get_template
    return self._load_template(name, globals)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\jinja2\environment.py", line 969, in _load_template
    template = self.loader.load(self, name, self.make_globals(globals))
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\jinja2\loaders.py", line 126, in load
    source, filename, uptodate = self.get_source(environment, name)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\templating.py", line 62, in get_source
    return self._get_source_fast(environment, template)
  File "C:\Users\koyej\Desktop\sparta\projects\prac\venv\lib\site-packages\flask\templating.py", line 98, in _get_source_fast
    raise TemplateNotFound(template)
jinja2.exceptions.TemplateNotFound: index_html
127.0.0.1 - - [08/Nov/2022 18:24:50] "GET /?__debugger__=yes&cmd=resource&f=style.css HTTP/1.1" 304 -
127.0.0.1 - - [08/Nov/2022 18:24:50] "GET /?__debugger__=yes&cmd=resource&f=debugger.js HTTP/1.1" 304 -
127.0.0.1 - - [08/Nov/2022 18:24:51] "GET /?__debugger__=yes&cmd=resource&f=console.png HTTP/1.1" 304 -





from flask import Flask, render_template
app = Flask(__name__)

@app.route('/')
def home():
   return render_template('index_html')

if __name__ == '__main__':
   app.run('0.0.0.0',port=5000,debug=True
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