我想从表单中读取四个用户名，将它们放入def index中，然后根据变量ilu等多少不是空字符串来设置变量username1，但是在键入后用户名并点击gotowe按钮，我将看到方法不允许：（
我在这里看到了其他类似的问题，但是很抱歉，我无法理解解决方案。
这是我第一次来，对于这个问题中的所有错误我深表歉意。 我几乎失去了所有希望：<我不知道该怎么办。
nazwy_graczy.html：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
{% block form %}
<form method="post" action="http://localhost:5000/index">
<div>
<p><input type="text" class="form-control" id="username1" name="username" placeholder="Wpisz nazwę użytkownika"></p>
<p><input type="text" class="form-control" id="username2" name="username" placeholder="Wpisz nazwę użytkownika"></p>
<p><input type="text" class="form-control" id="username3" name="username" placeholder="Wpisz nazwę użytkownika"></p>
<p><input type="text" class="form-control" id="username4" name="username" placeholder="Wpisz nazwę użytkownika"></p>
</div>
</form>
<a href="/index"><button type="submit" class="btn btn-primary">Gotowe</button></a>
{% endblock %}
</body>
</html>
index.html：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Strona</title>
<link rel="stylesheet" href="{{ url_for('static', filename='style.css') }}">
</head>
<body>
{% extends "hand1.html" %}
{% block tabela%}
<table style="width:100%">
<tr>
<th>Gracz</th>
<th>Phase</th>
<th>Punkty</th>
</tr>
<tr style="text-align=center; ">
<td>{{user1}}</td>
<td>{{point}}</td>
<td>{{phase}}</td>
</tr>
<tr style="text-align=center; ">
<td>{{user2}}</td>
<td>{{point}}</td>
<td>{{phase}}</td>
</tr>
<tr style="text-align=center; ">
<td>{{user3}}</td>
<td>{{point}}</td>
<td>{{phase}}</td>
</tr>
<tr style="text-align=center; ">
<td>{{user4}}</td>
<td>{{point}}</td>
<td>{{phase}}</td>
</tr>
</table>
{% endblock %}
</body>
</html>
app.py：
from flask import Flask, render_template, request
from players import Player
import engine
import cards
from random import shuffle
app = Flask(__name__)
# globals start -----------------------------------------------------
rejected_card = cards.CardsNumbers(1, 1)
dash_length = 140
Q = 0
real_players = []
real_players_f_phases = []
player_decks = []
main_deck = []
players_phases = []
players_names = []
is_new_game = True
# globals end -------------------------------------------------------
@app.route('/')
def nazwy_graczy():
return render_template('nazwy_graczy.html')
@app.route('/index', methods=['GET, POST'])
def index():
global players_names
global ilu
if request.method == 'POST':
user1 = request.form['username1']
user2 = request.form['username2']
user3 = request.form['username3']
user4 = request.form['username4']
players_names = [user1, user2, user3, user4]
ilu = 0
for u in list(players_names):
if u != '':
ilu += 1
else:
return 0
return render_template('index.html', ilu=ilu, user1=user1, user2=user2, user3=user3, user4=user4)
@app.route('/hand1')
def hand1():
global players_names
global is_new_game
global ilu
if is_new_game:
is_new_game = False
new_game(ilu)
user = players_names[0]
user.sort_cards_by_number()
return render_template('hand1.html', hand1=user.show_cards())
def new_game(uniq_amount):
global real_players
global real_players_f_phases
global players_decks
global main_deck
global players_phases
global players_names
global Q
Q = engine.queue(uniq_amount)
all_cards = cards.rozdaj_karty(uniq_amount)
players_decks = all_cards[0:-1]
main_deck = all_cards[-1]
shuffle(main_deck)
for i in range(uniq_amount):
real_players.append(Player(players_names[i], players_decks[i]))
for i in range(len(real_players)):
real_players_f_phases.append(False)
if __name__ == '__main__':
app.run(debug=True)
查看页面来源：
第一页：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form method="post" action="http://localhost:5000/index">
<div>
<p><input type="text" class="form-control" id="username1" name="username" placeholder="Wpisz nazwę użytkownika">
</p>
<p><input type="text" class="form-control" id="username2" name="username" placeholder="Wpisz nazwę użytkownika">
</p>
<p><input type="text" class="form-control" id="username3" name="username" placeholder="Wpisz nazwę użytkownika">
</p>
<p><input type="text" class="form-control" id="username4" name="username" placeholder="Wpisz nazwę użytkownika">
</p>
</div>
<input type="submit" value="Submit">
</form>
</body>
</html>
错误：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>werkzeug.exceptions.HTTPException.wrap.<locals>.newcls: 400 Bad Request: KeyError: 'username1' // Werkzeug Debugger</title>
<link rel="stylesheet" href="?__debugger__=yes&cmd=resource&f=style.css"
type="text/css">
<!-- We need to make sure this has a favicon so that the debugger does
not by accident trigger a request to /favicon.ico which might
change the application state. -->
<link rel="shortcut icon"
href="?__debugger__=yes&cmd=resource&f=console.png">
<script src="?__debugger__=yes&cmd=resource&f=jquery.js"></script>
<script src="?__debugger__=yes&cmd=resource&f=debugger.js"></script>
<script type="text/javascript">
var TRACEBACK = 140589934758992,
CONSOLE_MODE = false,
EVALEX = true,
EVALEX_TRUSTED = false,
SECRET = "NYIRoPSadEHEGDJ1PkU6";
</script>
</head>
<body style="background-color: #fff">
<div class="debugger">
<h1>werkzeug.exceptions.BadRequestKeyError</h1>
<div class="detail">
<p class="errormsg">werkzeug.exceptions.HTTPException.wrap.<locals>.newcls: 400 Bad Request: KeyError: 'username1'</p>
</div>
<h2 class="traceback">Traceback <em>(most recent call last)</em></h2>
<div class="traceback">
<ul><li><div class="frame" id="frame-140589917417656">
<h4>File <cite class="filename">"/usr/local/lib/python3.7/dist-packages/flask/app.py"</cite>,
line <em class="line">2309</em>,
in <code class="function">__call__</code></h4>
<div class="source"><pre class="line before"><span class="ws"></span> </pre>
<pre class="line before"><span class="ws"> </span>def __call__(self, environ, start_response):</pre>
<pre class="line before"><span class="ws"> </span>"""The WSGI server calls the Flask application object as the</pre>
<pre class="line before"><span class="ws"> </span>WSGI application. This calls :meth:`wsgi_app` which can be</pre>
<pre class="line before"><span class="ws"> </span>wrapped to applying middleware."""</pre>
<pre class="line current"><span class="ws"> </span>return self.wsgi_app(environ, start_response)</pre>
<pre class="line after"><span class="ws"></span> </pre>
<pre class="line after"><span class="ws"> </span>def __repr__(self):</pre>
<pre class="line after"><span class="ws"> </span>return '<%s %r>' % (</pre>
<pre class="line after"><span class="ws"> </span>self.__class__.__name__,</pre>
<pre class="line after"><span class="ws"> </span>self.name,</pre></div>
</div>
<li><div class="frame" id="frame-140589917419112">
<h4>File <cite class="filename">"/usr/local/lib/python3.7/dist-packages/flask/app.py"</cite>,
line <em class="line">2295</em>,
in <code class="function">wsgi_app</code></h4>
<div class="source"><pre class="line before"><span class="ws"> </span>try:</pre>
<pre class="line before"><span class="ws"> </span>ctx.push()</pre>
<pre class="line before"><span class="ws"> </span>response = self.full_dispatch_request()</pre>
<pre class="line before"><span class="ws"> </span>except Exception as e:</pre>
<pre class="line before"><span class="ws"> </span>error = e</pre>
<pre class="line current"><span class="ws"> </span>response = self.handle_exception(e)</pre>
<pre class="line after"><span class="ws"> </span>except:</pre>
<pre class="line after"><span class="ws"> </span>error = sys.exc_info()[1]</pre>
<pre class="line after"><span class="ws"> </span>raise</pre>
<pre class="line after"><span class="ws"> </span>return response(environ, start_response)</pre>
<pre class="line after"><span class="ws"> </span>finally:</pre></div>
</div>
<li><div class="frame" id="frame-140589917419168">
<h4>File <cite class="filename">"/usr/local/lib/python3.7/dist-packages/flask/app.py"</cite>,
line <em class="line">1741</em>,
in <code class="function">handle_exception</code></h4>
<div class="source"><pre class="line before"><span class="ws"> </span># if we want to repropagate the exception, we can attempt to</pre>
<pre class="line before"><span class="ws"> </span># raise it with the whole traceback in case we can do that</pre>
<pre class="line before"><span class="ws"> </span># (the function was actually called from the except part)</pre>
<pre class="line before"><span class="ws"> </span># otherwise, we just raise the error again</pre>
<pre class="line before"><span class="ws"> </span>if exc_value is e:</pre>
<pre class="line current"><span class="ws"> </span>reraise(exc_type, exc_value, tb)</pre>
<pre class="line after"><span class="ws"> </span>else:</pre>
<pre class="line after"><span class="ws"> </span>raise e</pre>
<pre class="line after"><span class="ws"></span> </pre>
<pre class="line after"><span class="ws"> </span>self.log_exception((exc_type, exc_value, tb))</pre>
<pre class="line after"><span class="ws"> </span>if handler is None:</pre></div>
</div>
<li><div class="frame" id="frame-140589917419224">
<h4>File <cite class="filename">"/usr/local/lib/python3.7/dist-packages/flask/_compat.py"</cite>,
line <em class="line">35</em>,
in <code class="function">reraise</code></h4>
<div class="source"><pre class="line before"><span class="ws"> </span>from io import StringIO</pre>
<pre class="line before"><span class="ws"></span> </pre>
<pre class="line before"><span class="ws"> </span>def reraise(tp, value, tb=None):</pre>
<pre class="line before"><span class="ws"> </span>if value.__traceback__ is not tb:</pre>
<pre class="line before"><span class="ws"> </span>raise value.with_traceback(tb)</pre>
<pre class="line current"><span class="ws"> </span>raise value</pre>
<pre class="line after"><span class="ws"></span> </pre>
<pre class="line after"><span class="ws"> </span>implements_to_string = _identity</pre>
<pre class="line after"><span class="ws"></span> </pre>
<pre class="line after"><span class="ws"></span>else:</pre>
<pre class="line after"><span class="ws"> </span>text_type = unicode</pre></div>
</div>
<li><div class="frame" id="frame-140589917419056">
<h4>File <cite class="filename">"/usr/local/lib/python3.7/dist-packages/flask/app.py"</cite>,
line <em class="line">2292</em>,
in <code class="function">wsgi_app</code></h4>
<div class="source"><pre class="line before"><span class="ws"> </span>ctx = self.request_context(environ)</pre>
<pre class="line before"><span class="ws"> </span>error = None</pre>
<pre class="line before"><span class="ws"> </span>try:</pre>
<pre class="line before"><span class="ws"> </span>try:</pre>
<pre class="line before"><span class="ws"> </span>ctx.push()</pre>
<pre class="line current"><span class="ws"> </span>response = self.full_dispatch_request()</pre>
<pre class="line after"><span class="ws"> </span>except Exception as e:</pre>
<pre class="line after"><span class="ws"> </span>error = e</pre>
<pre class="line after"><span class="ws"> </span>response = self.handle_exception(e)</pre>
<pre class="line after"><span class="ws"> </span>except:</pre>
<pre class="line after"><span class="ws"> </span>error = sys.exc_info()[1]</pre></div>
</div>
<li><div class="frame" id="frame-140589917419336">
<h4>File <cite class="filename">"/usr/local/lib/python3.7/dist-packages/flask/app.py"</cite>,
line <em class="line">1815</em>,
in <code class="function">full_dispatch_request</code></h4>
<div class="source"><pre class="line before"><span class="ws"> </span>request_started.send(self)</pre>
<pre class="line before"><span class="ws"> </span>rv = self.preprocess_request()</pre>
<pre class="line before"><span class="ws"> </span>if rv is None:</pre>
<pre class="line before"><span class="ws"> </span>rv = self.dispatch_request()</pre>
<pre class="line before"><span class="ws"> </span>except Exception as e:</pre>
<pre class="line current"><span class="ws"> </span>rv = self.handle_user_exception(e)</pre>
<pre class="line after"><span class="ws"> </span>return self.finalize_request(rv)</pre>
<pre class="line after"><span class="ws"></span> </pre>
<pre class="line after"><span class="ws"> </span>def finalize_request(self, rv, from_error_handler=False):</pre>
<pre class="line after"><span class="ws"> </span>"""Given the return value from a view function this finalizes</pre>
<pre class="line after"><span class="ws"> </span>the request by converting it into a response and invoking the</pre></div>
</div>
<li><div class="frame" id="frame-140589917419392">
<h4>File <cite class="filename">"/usr/local/lib/python3.7/dist-packages/flask/app.py"</cite>,
line <em class="line">1718</em>,
in <code class="function">handle_user_exception</code></h4>
<div class="source"><pre class="line before"><span class="ws"> </span>return self.handle_http_exception(e)</pre>
<pre class="line before"><span class="ws"></span> </pre>
<pre class="line before"><span class="ws"> </span>handler = self._find_error_handler(e)</pre>
<pre class="line before"><span class="ws"></span> </pre>
<pre class="line before"><span class="ws"> </span>if handler is None:</pre>
<pre class="line current"><span class="ws"> </span>reraise(exc_type, exc_value, tb)</pre>
<pre class="line after"><span class="ws"> </span>return handler(e)</pre>
<pre class="line after"><span class="ws"></span> </pre>
<pre class="line after"><span class="ws"> </span>def handle_exception(self, e):</pre>
<pre class="line after"><span class="ws"> </span>"""Default exception handling that kicks in when an exception</pre>
<pre class="line after"><span class="ws"> </span>occurs that is not caught. In debug mode the exception will</pre></div>
</div>
<li><div class="frame" id="frame-140589917419448">
<h4>File <cite class="filename">"/usr/local/lib/python3.7/dist-packages/flask/_compat.py"</cite>,
line <em class="line">35</em>,
in <code class="function">reraise</code></h4>
<div class="source"><pre class="line before"><span class="ws"> </span>from io import StringIO</pre>
<pre class="line before"><span class="ws"></span> </pre>
<pre class="line before"><span class="ws"> </span>def reraise(tp, value, tb=None):</pre>
<pre class="line before"><span class="ws"> </span>if value.__traceback__ is not tb:</pre>
<pre class="line before"><span class="ws"> </span>raise value.with_traceback(tb)</pre>
<pre class="line current"><span class="ws"> </span>raise value</pre>
<pre class="line after"><span class="ws"></span> </pre>
<pre class="line after"><span class="ws"> </span>implements_to_string = _identity</pre>
<pre class="line after"><span class="ws"></span> </pre>
<pre class="line after"><span class="ws"></span>else:</pre>
<pre class="line after"><span class="ws"> </span>text_type = unicode</pre></div>
</div>
<li><div class="frame" id="frame-140589917419280">
<h4>File <cite class="filename">"/usr/local/lib/python3.7/dist-packages/flask/app.py"</cite>,
line <em class="line">1813</em>,
in <code class="function">full_dispatch_request</code></h4>
<div class="source"><pre class="line before"><span class="ws"> </span>self.try_trigger_before_first_request_functions()</pre>
<pre class="line before"><span class="ws"> </span>try:</pre>
<pre class="line before"><span class="ws"> </span>request_started.send(self)</pre>
<pre class="line before"><span class="ws"> </span>rv = self.preprocess_request()</pre>
<pre class="line before"><span class="ws"> </span>if rv is None:</pre>
<pre class="line current"><span class="ws"> </span>rv = self.dispatch_request()</pre>
<pre class="line after"><span class="ws"> </span>except Exception as e:</pre>
<pre class="line after"><span class="ws"> </span>rv = self.handle_user_exception(e)</pre>
<pre class="line after"><span class="ws"> </span>return self.finalize_request(rv)</pre>
<pre class="line after"><span class="ws"></span> </pre>
<pre class="line after"><span class="ws"> </span>def finalize_request(self, rv, from_error_handler=False):</pre></div>
</div>
<li><div class="frame" id="frame-140589917419560">
<h4>File <cite class="filename">"/usr/local/lib/python3.7/dist-packages/flask/app.py"</cite>,
line <em class="line">1799</em>,
in <code class="function">dispatch_request</code></h4>
<div class="source"><pre class="line before"><span class="ws"> </span># request came with the OPTIONS method, reply automatically</pre>
<pre class="line before"><span class="ws"> </span>if getattr(rule, 'provide_automatic_options', False) \</pre>
<pre class="line before"><span class="ws"> </span>and req.method == 'OPTIONS':</pre>
<pre class="line before"><span class="ws"> </span>return self.make_default_options_response()</pre>
<pre class="line before"><span class="ws"> </span># otherwise dispatch to the handler for that endpoint</pre>
<pre class="line current"><span class="ws"> </span>return self.view_functions[rule.endpoint](**req.view_args)</pre>
<pre class="line after"><span class="ws"></span> </pre>
<pre class="line after"><span class="ws"> </span>def full_dispatch_request(self):</pre>
<pre class="line after"><span class="ws"> </span>"""Dispatches the request and on top of that performs request</pre>
<pre class="line after"><span class="ws"> </span>pre and postprocessing as well as HTTP exception catching and</pre>
<pre class="line after"><span class="ws"> </span>error handling.</pre></div>
</div>
<li><div class="frame" id="frame-140589917419616">
<h4>File <cite class="filename">"/root/PycharmProjects/projekt_ig/app.py"</cite>,
line <em class="line">35</em>,
in <code class="function">index</code></h4>
<div class="source"><pre class="line before"><span class="ws"></span>@app.route('/index', methods=['POST'])</pre>
<pre class="line before"><span class="ws"></span>def index():</pre>
<pre class="line before"><span class="ws"> </span>global players_names</pre>
<pre class="line before"><span class="ws"> </span>global ilu</pre>
<pre class="line before"><span class="ws"> </span>if request.method == 'POST':</pre>
<pre class="line current"><span class="ws"> </span>user1 = request.form['username1']</pre>
<pre class="line after"><span class="ws"> </span>user2 = request.form['username2']</pre>
<pre class="line after"><span class="ws"> </span>user3 = request.form['username3']</pre>
<pre class="line after"><span class="ws"> </span>user4 = request.form['username4']</pre>
<pre class="line after"><span class="ws"></span> </pre>
<pre class="line after"><span class="ws"> </span>players_names = [user1, user2, user3, user4]</pre></div>
</div>
<li><div class="frame" id="frame-140589917417712">
<h4>File <cite class="filename">"/usr/local/lib/python3.7/dist-packages/werkzeug/datastructures.py"</cite>,
line <em class="line">431</em>,
in <code class="function">__getitem__</code></h4>
<div class="source"><pre class="line before"><span class="ws"> </span>"""</pre>
<pre class="line before"><span class="ws"> </span>if key in self:</pre>
<pre class="line before"><span class="ws"> </span>lst = dict.__getitem__(self, key)</pre>
<pre class="line before"><span class="ws"> </span>if len(lst) > 0:</pre>
<pre class="line before"><span class="ws"> </span>return lst[0]</pre>
<pre class="line current"><span class="ws"> </span>raise exceptions.BadRequestKeyError(key)</pre>
<pre class="line after"><span class="ws"></span> </pre>
<pre class="line after"><span class="ws"> </span>def __setitem__(self, key, value):</pre>
<pre class="line after"><span class="ws"> </span>"""Like :meth:`add` but removes an existing key first.</pre>
<pre class="line after"><span class="ws"></span> </pre>
<pre class="line after"><span class="ws"> </span>:param key: the key for the value.</pre></div>
</div>
</ul>
<blockquote>werkzeug.exceptions.HTTPException.wrap.<locals>.newcls: 400 Bad Request: KeyError: 'username1'</blockquote>
</div>
<div class="plain">
<form action="/?__debugger__=yes&cmd=paste" method="post">
<p>
<input type="hidden" name="language" value="pytb">
This is the Copy/Paste friendly version of the traceback. <span
class="pastemessage">You can also paste this traceback into
a <a href="https://gist.github.com/">gist</a>:
<input type="submit" value="create paste"></span>
</p>
<textarea cols="50" rows="10" name="code" readonly>Traceback (most recent call last):
File "/usr/local/lib/python3.7/dist-packages/flask/app.py", line 2309, in __call__
return self.wsgi_app(environ, start_response)
File "/usr/local/lib/python3.7/dist-packages/flask/app.py", line 2295, in wsgi_app
response = self.handle_exception(e)
File "/usr/local/lib/python3.7/dist-packages/flask/app.py", line 1741, in handle_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python3.7/dist-packages/flask/_compat.py", line 35, in reraise
raise value
File "/usr/local/lib/python3.7/dist-packages/flask/app.py", line 2292, in wsgi_app
response = self.full_dispatch_request()
File "/usr/local/lib/python3.7/dist-packages/flask/app.py", line 1815, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/usr/local/lib/python3.7/dist-packages/flask/app.py", line 1718, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python3.7/dist-packages/flask/_compat.py", line 35, in reraise
raise value
File "/usr/local/lib/python3.7/dist-packages/flask/app.py", line 1813, in full_dispatch_request
rv = self.dispatch_request()
File "/usr/local/lib/python3.7/dist-packages/flask/app.py", line 1799, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/root/PycharmProjects/projekt_ig/app.py", line 35, in index
user1 = request.form['username1']
File "/usr/local/lib/python3.7/dist-packages/werkzeug/datastructures.py", line 431, in __getitem__
raise exceptions.BadRequestKeyError(key)
werkzeug.exceptions.HTTPException.wrap.<locals>.newcls: 400 Bad Request: KeyError: 'username1'</textarea>
</form>
</div>
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The debugger caught an exception in your WSGI application. You can now
look at the traceback which led to the error. <span class="nojavascript">
If you enable JavaScript you can also use additional features such as code
execution (if the evalex feature is enabled), automatic pasting of the
exceptions and much more.</span>
</div>
<div class="footer">
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<h3>Console Locked</h3>
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<p>PIN:
<input type=text name=pin size=14>
<input type=submit name=btn value="Confirm Pin">
</form>
</div>
</div>
</body>
</html>
<!--
Traceback (most recent call last):
File "/usr/local/lib/python3.7/dist-packages/flask/app.py", line 2309, in __call__
return self.wsgi_app(environ, start_response)
File "/usr/local/lib/python3.7/dist-packages/flask/app.py", line 2295, in wsgi_app
response = self.handle_exception(e)
File "/usr/local/lib/python3.7/dist-packages/flask/app.py", line 1741, in handle_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python3.7/dist-packages/flask/_compat.py", line 35, in reraise
raise value
File "/usr/local/lib/python3.7/dist-packages/flask/app.py", line 2292, in wsgi_app
response = self.full_dispatch_request()
File "/usr/local/lib/python3.7/dist-packages/flask/app.py", line 1815, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/usr/local/lib/python3.7/dist-packages/flask/app.py", line 1718, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python3.7/dist-packages/flask/_compat.py", line 35, in reraise
raise value
File "/usr/local/lib/python3.7/dist-packages/flask/app.py", line 1813, in full_dispatch_request
rv = self.dispatch_request()
File "/usr/local/lib/python3.7/dist-packages/flask/app.py", line 1799, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/root/PycharmProjects/projekt_ig/app.py", line 35, in index
user1 = request.form['username1']
File "/usr/local/lib/python3.7/dist-packages/werkzeug/datastructures.py", line 431, in __getitem__
raise exceptions.BadRequestKeyError(key)
werkzeug.exceptions.HTTPException.wrap.<locals>.newcls: 400 Bad Request: KeyError: 'username1'
-->
答案 0 :(得分：0)
尝试将nazwy_graczy.html修改为以下内容：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form method="post" action="http://localhost:5000/index">
<div>
<p><input type="text" class="form-control" id="username1" name="username" placeholder="Wpisz nazwę użytkownika">
</p>
<p><input type="text" class="form-control" id="username2" name="username" placeholder="Wpisz nazwę użytkownika">
</p>
<p><input type="text" class="form-control" id="username3" name="username" placeholder="Wpisz nazwę użytkownika">
</p>
<p><input type="text" class="form-control" id="username4" name="username" placeholder="Wpisz nazwę użytkownika">
</p>
</div>
<input type="submit" value="Submit">
</form>
</body>
</html>
答案 1 :(得分：0)
我找到了答案！我要做的就是在name
<input type="text" class="form-control" id="username1" name="username1" placeholder="Wpisz nazwę użytkownika">
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
{% block form %}
<form method="post" action="http://localhost:5000/index">
<div>
<p><input type="text" class="form-control" id="username1" name="username1" placeholder="Wpisz nazwę użytkownika"></p>
<p><input type="text" class="form-control" id="username2" name="username2" placeholder="Wpisz nazwę użytkownika"></p>
<p><input type="text" class="form-control" id="username3" name="username3" placeholder="Wpisz nazwę użytkownika"></p>
<p><input type="text" class="form-control" id="username4" name="username4" placeholder="Wpisz nazwę użytkownika"></p>
</div>
</form>