Question

我使用conda install -c vgauthier networkit安装了Networkit模块。如果我在笔记本中导入它（import networkit as nk），我会收到此错误：

---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-2-a4c0096fb06c> in <module>()
----> 1 import networkit as nk

//anaconda/envs/py36/lib/python3.6/site-packages/networkit/__init__.py in <module>()
     41 # local imports
     42 from . import stopwatch
---> 43 from . import graph
     44 from . import graphio
     45 from . import community

//anaconda/envs/py36/lib/python3.6/site-packages/networkit/graph.py in <module>()
      1 # extension imports
----> 2 from _NetworKit import Graph, SpanningForest, GraphTools, RandomMaximumSpanningForest, UnionMaximumSpanningForest

ImportError: dlopen(//anaconda/envs/py36/lib/python3.6/site-packages/_NetworKit.cpython-36m-darwin.so, 2): Library not loaded: @rpath/libomp.dylib
  Referenced from: //anaconda/envs/py36/lib/python3.6/site-packages/_NetworKit.cpython-36m-darwin.so
  Reason: image not found

任何人都可以解释原因吗？

Answer 1

我碰巧通过pip为networkit遇到了同样的问题。这是因为anaconda安装的网络没有正确链接到你的gcc编译器，一个简单的解决方法是下载networkit的源代码并运行python3 setup.py install来安装它。

Answer 2

我遇到了同样的问题： https://github.com/kit-parco/networkit/issues/172

这是因为蟒蛇。使用以下方法重新安装它：

using System;
using System.Collections.Specialized;
using System.Text;
using System.Text.RegularExpressions;

public static class UriExtensions
{
    public static Uri DropQueryItem(this Uri u, string key)
    {
        UriBuilder b = new UriBuilder(u);
        b.RemoveQueryItem(key);
        return b.Uri;
    }
}
public static class UriBuilderExtensions
{
    private static string _ParseQueryPattern = @"(?<key>[^&=]+)={0,1}(?<value>[^&]*)";
    private static Regex _ParseQueryRegex = null;

    private static Regex ParseQueryRegex
    {
        get
        {
            if (_ParseQueryRegex == null)
            {
                _ParseQueryRegex = new Regex(_ParseQueryPattern, RegexOptions.Compiled | RegexOptions.Singleline);
            }
            return _ParseQueryRegex;

        }
    }

    public static void SetQueryItem(this UriBuilder b, string key, string value)
    {
        NameValueCollection parms = ParseQueryString(b.Query);
        parms[key] = value;
        b.Query = RenderQuery(parms);
    }

    public static void RemoveQueryItem(this UriBuilder b, string key)
    {
        NameValueCollection parms = ParseQueryString(b.Query);
        parms.Remove(key);
        b.Query = RenderQuery(parms);
    }       
    private static string RenderQuery(NameValueCollection parms)
    {
        StringBuilder sb = new StringBuilder();
        for (int i=0; i<parms.Count; i++)
        {
            string key = parms.Keys[i];
            sb.Append(key + "=" + parms[key]);
            if (i < parms.Count - 1)
            {
                sb.Append("&");
            }
        }
        return sb.ToString();
    }
    public static NameValueCollection ParseQueryString(string query, bool caseSensitive = true)
    {
        NameValueCollection pairs = new NameValueCollection(caseSensitive ? StringComparer.Ordinal : StringComparer.OrdinalIgnoreCase);

        string q = query.Trim().TrimStart(new char[] {'?'});
        MatchCollection matches = ParseQueryRegex.Matches(q);

        foreach (Match m in matches)
        {
            string key = m.Groups["key"].Value;
            string value = m.Groups["value"].Value;
            if (pairs[key] != null)
            {
                pairs[key] = pairs[key] + "," + value;
            }
            else
            {
                pairs[key] = value;
            }

        }

        return pairs;

    }

}

使用Jupyter笔记本上传Networkit python模块时出错

2 个答案: