从 examples/basics/visuals/graphy.py 开始，我尝试显示直方图但失败了：

from vispy import app, visuals
import wx
import numpy as np

class snrHistogram(app.Canvas):
    def __init__(self, *args, **kwargs):
        app.Canvas.__init__(self, title='histogram fail',
                            keys="interactive", size=(600, 600))

        self.snr_hist = visuals.HistogramVisual(np.arange(256), bins=4, color='r', orientation='v')
        self.label = visuals.TextVisual("hi", color='blue', pos=[50, 50, 0])
        self.configure_transforms()
        self.show()

    def configure_transforms(self):
        vp = (0, 0, self.physical_size[0], self.physical_size[1])
        self.context.set_viewport(*vp)
        self.label.transforms.configure(canvas=self, viewport=vp)
        self.snr_hist.transforms.configure(canvas=self, viewport=vp)

    def on_resize(self, event):
        self.configure_transforms()

    def on_mouse_wheel(self, event):
        self.update()

    def on_draw(self, event):
        self.snr_hist.draw()
        self.label.draw()
        self.update()

    def on_close(self, event):
        self.close()

if __name__ == '__main__':
    s = snrHistogram()
    app.run() …

我有一个客户端和服务器设置为彼此交谈.但每次我尝试回应客户端时套接字似乎已断开连接.大部分代码都是根据yolinux上的套接字教程改编的.另外,我是通过ssh远程运行的.

客户:

#include <cerrno>
#include <sys/types.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <sys/socket.h>
#include <netdb.h>
#include <sys/select.h>
#include <sys/time.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <errno.h>
#include <iostream>
#include <cstdlib>
#include <stdlib.h>
#include <strings.h>
#include <string.h>
#include <string>
#include <sstream>

using namespace std;

main(int argc, char *argv[])
{

    if (argc != 3) {
        cout << "exiting\n";
        exit(EXIT_FAILURE);
    }

    struct sockaddr_in remoteSocketInfo;
    struct hostent *hPtr;
    int socketHandle;
    char *remoteHost = argv[1];
    int portNumber = atoi(argv[2]);

    cout << "Welcome!\n";

    // create socket …