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25
4
这是我使用 Restful 的 Flask 代码。
def get(self):
data = [{"id": "2", "lags": [{"id": "GBPQ1"}, {"id": "GBPQ2"},{"id": "GBPQ3"}, {"id": "BPQ4"}], "name": "GBP"}]
return jsonify(data)
这是我的错误:为什么？每个 jsoinlint 的有效 json。怎么解决？
curl http://0.0.0.0:5000/test/model/exposure/currencies/
curl http://0.0.0.0:5000/test/model/exposure/currencies/111111
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>ValueError: dictionary update sequence element #0 has length 3; 2 is required // 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 type="text/javascript" src="?__debugger__=yes&cmd=resource&f=jquery.js"></script>
<script type="text/javascript" src="?__debugger__=yes&cmd=resource&f=debugger.js"></script>
<script type="text/javascript">
var TRACEBACK = 140493007176848,
CONSOLE_MODE = false,
EVALEX = true,
SECRET = "hIZ55a7qO5d1PpF7ILd6";
</script>
</head>
<body>
<div class="debugger">
<h1>ValueError</h1>
<div class="detail">
<p class="errormsg">ValueError: dictionary update sequence element #0 has length 3; 2 is required</p>
</div>
<h2 class="traceback">Traceback <em>(most recent call last)</em></h2>
<div class="traceback">
<ul><li><div class="frame" id="frame-140493007176784">
<h4>File <cite class="filename">"/usr/local/lib/python2.7/dist-packages/flask/app.py"</cite>,
line <em class="line">1836</em>,
in <code class="function">__call__</code></h4>
<pre>return self.wsgi_app(environ, start_response)</pre>
</div>
<li><div class="frame" id="frame-140493007177104">
<h4>File <cite class="filename">"/usr/local/lib/python2.7/dist-packages/flask/app.py"</cite>,
line <em class="line">1820</em>,
in <code class="function">wsgi_app</code></h4>
<pre>response = self.make_response(self.handle_exception(e))</pre>
</div>
<li><div class="frame" id="frame-140493007177168">
<h4>File <cite class="filename">"/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py"</cite>,
line <em class="line">271</em>,
in <code class="function">error_router</code></h4>
<pre>return original_handler(e)</pre>
</div>
<li><div class="frame" id="frame-140493007176912">
<h4>File <cite class="filename">"/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py"</cite>,
line <em class="line">271</em>,
in <code class="function">error_router</code></h4>
<pre>return original_handler(e)</pre>
</div>
<li><div class="frame" id="frame-140493007176976">
<h4>File <cite class="filename">"/usr/local/lib/python2.7/dist-packages/flask_cors/extension.py"</cite>,
line <em class="line">188</em>,
in <code class="function">wrapped_function</code></h4>
<pre>return cors_after_request(app.make_response(f(*args, **kwargs)))</pre>
</div>
<li><div class="frame" id="frame-140493007177296">
<h4>File <cite class="filename">"/usr/local/lib/python2.7/dist-packages/flask/app.py"</cite>,
line <em class="line">1403</em>,
in <code class="function">handle_exception</code></h4>
<pre>reraise(exc_type, exc_value, tb)</pre>
</div>
<li><div class="frame" id="frame-140493007177424">
<h4>File <cite class="filename">"/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py"</cite>,
line <em class="line">268</em>,
in <code class="function">error_router</code></h4>
<pre>return self.handle_error(e)</pre>
</div>
<li><div class="frame" id="frame-140493007177360">
<h4>File <cite class="filename">"/usr/local/lib/python2.7/dist-packages/flask/app.py"</cite>,
line <em class="line">1817</em>,
in <code class="function">wsgi_app</code></h4>
<pre>response = self.full_dispatch_request()</pre>
</div>
<li><div class="frame" id="frame-140493007177552">
<h4>File <cite class="filename">"/usr/local/lib/python2.7/dist-packages/flask/app.py"</cite>,
line <em class="line">1477</em>,
in <code class="function">full_dispatch_request</code></h4>
<pre>rv = self.handle_user_exception(e)</pre>
</div>
<li><div class="frame" id="frame-140493007177616">
<h4>File <cite class="filename">"/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py"</cite>,
line <em class="line">271</em>,
in <code class="function">error_router</code></h4>
<pre>return original_handler(e)</pre>
</div>
<li><div class="frame" id="frame-140493007177232">
<h4>File <cite class="filename">"/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py"</cite>,
line <em class="line">271</em>,
in <code class="function">error_router</code></h4>
<pre>return original_handler(e)</pre>
</div>
<li><div class="frame" id="frame-140493007177488">
<h4>File <cite class="filename">"/usr/local/lib/python2.7/dist-packages/flask_cors/extension.py"</cite>,
line <em class="line">188</em>,
in <code class="function">wrapped_function</code></h4>
<pre>return cors_after_request(app.make_response(f(*args, **kwargs)))</pre>
</div>
<li><div class="frame" id="frame-140493007177744">
<h4>File <cite class="filename">"/usr/local/lib/python2.7/dist-packages/flask/app.py"</cite>,
line <em class="line">1381</em>,
in <code class="function">handle_user_exception</code></h4>
<pre>reraise(exc_type, exc_value, tb)</pre>
</div>
<li><div class="frame" id="frame-140493007177872">
<h4>File <cite class="filename">"/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py"</cite>,
line <em class="line">268</em>,
in <code class="function">error_router</code></h4>
<pre>return self.handle_error(e)</pre>
</div>
<li><div class="frame" id="frame-140493007177808">
<h4>File <cite class="filename">"/usr/local/lib/python2.7/dist-packages/flask/app.py"</cite>,
line <em class="line">1475</em>,
in <code class="function">full_dispatch_request</code></h4>
<pre>rv = self.dispatch_request()</pre>
</div>
<li><div class="frame" id="frame-140493007178000">
<h4>File <cite class="filename">"/usr/local/lib/python2.7/dist-packages/flask/app.py"</cite>,
line <em class="line">1461</em>,
in <code class="function">dispatch_request</code></h4>
<pre>return self.view_functions[rule.endpoint](**req.view_args)</pre>
</div>
<li><div class="frame" id="frame-140493007178064">
<h4>File <cite class="filename">"/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py"</cite>,
line <em class="line">477</em>,
in <code class="function">wrapper</code></h4>
<pre>resp = resource(*args, **kwargs)</pre>
</div>
<li><div class="frame" id="frame-140493007177680">
<h4>File <cite class="filename">"/usr/local/lib/python2.7/dist-packages/flask/views.py"</cite>,
line <em class="line">84</em>,
in <code class="function">view</code></h4>
<pre>return self.dispatch_request(*args, **kwargs)</pre>
</div>
<li><div class="frame" id="frame-140493007177936">
<h4>File <cite class="filename">"/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py"</cite>,
line <em class="line">587</em>,
in <code class="function">dispatch_request</code></h4>
<pre>resp = meth(*args, **kwargs)</pre>
</div>
<li><div class="frame" id="frame-140493007178128">
<h4>File <cite class="filename">"/home/ubuntu/workspace/qtaapi/qtaapi/resources/model_exposure_currencies.py"</cite>,
line <em class="line">198</em>,
in <code class="function">get</code></h4>
<pre>return jsonify(data)</pre>
</div>
<li><div class="frame" id="frame-140493007178192">
<h4>File <cite class="filename">"/usr/local/lib/python2.7/dist-packages/flask/json.py"</cite>,
line <em class="line">237</em>,
in <code class="function">jsonify</code></h4>
<pre>return current_app.response_class(dumps(dict(*args, **kwargs),</pre>
</div>
</ul>
<blockquote>ValueError: dictionary update sequence element #0 has length 3; 2 is required</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/python2.7/dist-packages/flask/app.py", line 1836, in __call__
return self.wsgi_app(environ, start_response)
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1820, in wsgi_app
response = self.make_response(self.handle_exception(e))
File "/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py", line 271, in error_router
return original_handler(e)
File "/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py", line 271, in error_router
return original_handler(e)
File "/usr/local/lib/python2.7/dist-packages/flask_cors/extension.py", line 188, in wrapped_function
return cors_after_request(app.make_response(f(*args, **kwargs)))
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1403, in handle_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py", line 268, in error_router
return self.handle_error(e)
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1817, in wsgi_app
response = self.full_dispatch_request()
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1477, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py", line 271, in error_router
return original_handler(e)
File "/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py", line 271, in error_router
return original_handler(e)
File "/usr/local/lib/python2.7/dist-packages/flask_cors/extension.py", line 188, in wrapped_function
return cors_after_request(app.make_response(f(*args, **kwargs)))
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1381, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py", line 268, in error_router
return self.handle_error(e)
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1475, in full_dispatch_request
rv = self.dispatch_request()
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1461, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py", line 477, in wrapper
resp = resource(*args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/flask/views.py", line 84, in view
return self.dispatch_request(*args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py", line 587, in dispatch_request
resp = meth(*args, **kwargs)
File "/home/ubuntu/workspace/qtaapi/qtaapi/resources/model_exposure_currencies.py", line 198, in get
return jsonify(data)
File "/usr/local/lib/python2.7/dist-packages/flask/json.py", line 237, in jsonify
return current_app.response_class(dumps(dict(*args, **kwargs),
ValueError: dictionary update sequence element #0 has length 3; 2 is required</textarea>
</form>
</div>
<div class="explanation">
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>
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<div class="footer">
Brought to you by <strong class="arthur">DON'T PANIC</strong>, your
friendly Werkzeug powered traceback interpreter.
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</html>
<!--
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1836, in __call__
return self.wsgi_app(environ, start_response)
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1820, in wsgi_app
response = self.make_response(self.handle_exception(e))
File "/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py", line 271, in error_router
return original_handler(e)
File "/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py", line 271, in error_router
return original_handler(e)
File "/usr/local/lib/python2.7/dist-packages/flask_cors/extension.py", line 188, in wrapped_function
return cors_after_request(app.make_response(f(*args, **kwargs)))
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1403, in handle_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py", line 268, in error_router
return self.handle_error(e)
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1817, in wsgi_app
response = self.full_dispatch_request()
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1477, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py", line 271, in error_router
return original_handler(e)
File "/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py", line 271, in error_router
return original_handler(e)
File "/usr/local/lib/python2.7/dist-packages/flask_cors/extension.py", line 188, in wrapped_function
return cors_after_request(app.make_response(f(*args, **kwargs)))
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1381, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py", line 268, in error_router
return self.handle_error(e)
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1475, in full_dispatch_request
rv = self.dispatch_request()
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1461, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py", line 477, in wrapper
resp = resource(*args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/flask/views.py", line 84, in view
return self.dispatch_request(*args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/Flask_RESTful-0.3.5-py2.7.egg/flask_restful/__init__.py", line 587, in dispatch_request
resp = meth(*args, **kwargs)
File "/home/ubuntu/workspace/qtaapi/qtaapi/resources/model_exposure_currencies.py", line 198, in get
return jsonify(data)
File "/usr/local/lib/python2.7/dist-packages/flask/json.py", line 237, in jsonify
return current_app.response_class(dumps(dict(*args, **kwargs),
ValueError: dictionary update sequence element #0 has length 3; 2 is required
-->
ubuntu@ubuntu:~/.ssh$
最佳答案
尝试给 jsonify 提供一个字典:
def get(self):
data = [{"id": "2", "lags": [{"id": "GBPQ1"}, {"id": "GBPQ2"},{"id": "GBPQ3"}, {"id": "BPQ4"}], "name": "GBP"}]
return jsonify({'data': data})
或者如果您愿意，您也可以这样做:return jsonify(data=data)
关于python - Flask 和有效的 json - ValueError : dictionary update sequence element #0 has length 3; 2 is required，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/38869273/
25
4
0
给定一个 Sequence of Sequences 类型，如何将其转换为单个扁平化 Sequence 类型？考虑以下 Ceylon 代码: Integer[] range(Integer max)
出于学习目的，我正在尝试使用 F# 以序列形式运行模拟。从一系列随机数开始，如果状态不依赖于先前的状态，map 是生成状态序列的直接方法。我遇到问题的地方是当我尝试做类似的事情时: State(i+1
我正在 DynamoDB 上开发论坛。 有一个帖子表，其中包含线程中的所有帖子。我需要对帖子中的顺序有一个概念，即我需要知道哪个帖子先出现，哪个后出现。 我的服务将在分布式环境中运行。 我不确定使用时
我正在 DynamoDB 上开发论坛。 有一个帖子表，其中包含线程中的所有帖子。我需要对帖子中的顺序有一个概念，即我需要知道哪个帖子先出现，哪个后出现。 我的服务将在分布式环境中运行。 我不确定使用时
在 Z3 中，它支持 String 和 Sequence。但是 Z3py 是否也支持它们，或者我们必须使用 Python 中的字符串或列表？从最新的版本来看，新版本好像确实支持了String和Sequ
我是 Clojure 世界的新手，我遇到了一个问题。我得到了一个 LazySeq，看起来像这样(实际上更长) values = (("Brand1" "0") ("Brand2" "15") ("Br
我正在开发一个用于文本生成的序列到序列模型 ( paper )。我没有在解码器端使用“教师强制”，即 t0 时解码器的输出被馈送到 t1 时解码器的输入。 现在，实际上，解码器(LSTM/GRU)的输
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我正在查看 Google 的免费机器学习速成类(class)，并尝试根据他们类(class)的第一部分制作一个预测模型。但是，在输入函数中，有一个字典，我不断收到此错误， in my_input_fn
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我正在将一些模块从 v8 迁移到 v10，我有这个模型: class SearchInfoPartnerSeniat(models.TransientModel): _name = "search.i
我尝试添加一个新的“自定义”序列到我的Marten DB中，以获取新用户的用户ID（在注册过程中）。。后来，我能够访问下一个序列值，如下所示：。问题出在上面的代码中：在第一次运行时：将userid_s
我在 rosettacode 遇到了这个代码 my @pascal = [1], { [0, |$_ Z+ |$_, 0] } ... Inf; .say for @pascal[^4]; # ==>
我不明白为什么这个程序有效: my $supply = Supply.interval: 1; react { whenever $supply { put "Got $^a" }
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