Question

我正在尝试运行代码：

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>
<!-- Fixed navbar -->
<nav class="navbar navbar-default navbar-fixed-top">
  <div class="container">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">Project name</a>
    </div>
    <div id="navbar" class="navbar-collapse collapse">
      <ul class="nav navbar-nav">
        <li class="active"><a href="#">Home</a></li>
      </ul>

      <ul class="nav navbar-nav navbar-right">
        <li class="dropdown">
          <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
          <ul class="dropdown-menu">
            <li>
              <a href="#">
                <p><strong>Action 1</strong></p> Some Text</a>
            </li>
            <hr/>
            <li>
              <a href="#">
                <p><strong>Action 2</strong></p> Some Text</a>
            </li>
            <li>
              <a href="#">
                <p><strong>Action 3</strong></p> Some Text</a>
            </li>
          </ul>
        </li>
      </ul>
    </div>
    <!--/.nav-collapse -->
  </div>
</nav>

<div class="container">
<br/><br/><br/><br/>
  Sample Content

</div>
<!-- /container -->

然而我收到错误消息：

from py2neo import Graph
graph = Graph(config['DATABASE']['ENDPOINT'])
graph.data("MATCH (u:Users) return u.id, u.email LIMIT 4")

这与py2neo网站上提供的格式完全相同

AttributeError: 'Graph' object has no attribute 'data'

有关错误消息的任何想法？感谢

Answer 1

我想你不在py2neo的第3版，尝试升级：

pip install py2neo --upgrade

这个简单的脚本工作正常：

from py2neo import Graph
graph = Graph(host="localhost")
d = graph.data("MATCH (t:TwitterAccount) RETURN t.user_screen_name LIMIT 4")

print(d)

-

ikwattro@graphaware ~/dev> python test.py
[{u't.user_screen_name': u'meichsnerbros'}, {u't.user_screen_name': u'renato_umeton'}, {u't.user_screen_name': u'kdnuggets'}, {u't.user_screen_name': u'sabrinaDijkhuiz'}]
ikwattro@graphaware ~/dev>

Answer 2

在3.1.1中添加了

Graph.data。如果你没有，那就不可用了。

Answer 3

在最新版本的py2neo（版本：4.3.0）中，此方法有效：

graph.run("MATCH (n:Document) RETURN n.title LIMIT 5").data()

更多信息可以在这里找到：https://py2neo.org/v4/database.html#the-graph

不能在neo4j v3中使用graph.data（）

3 个答案: