實時散景插座python

Question

我試圖了解如何使用散景服務器來顯示使用套接字的實時繪圖。 到目前為止，我創建了兩個文件來運行到兩個單獨的窗口，以模擬要發送的數據流。

我有一個client.py發送一個包含3個元素的數組：

import sys
import time
import socket
from pylab import randn


# Create a TCP/IP socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# Connect the socket to the port where the server is listening
server_address = ('localhost', 2000)
sock.connect(server_address)

try:
    for i in xrange(100):
        m = randn(3)
        message = m.tostring()
        print >>sys.stderr, 'sending "%s"' % m
        sock.sendall(message)
        time.sleep(0.01)

finally:
    print >>sys.stderr, 'closing socket'
    sock.close()

我還有一個server.py接收數據並更新散景服務器中的繪圖。

import sys
import time
import socket
from pylab import *
from bokeh.plotting import cursession, figure, show, output_server


output_server("raw_values")

# Visualization workflow
counter = 0
rx = [0]
ry = [0]
rz = [0]
p = figure()
x = [0]
p.line(x, rx, name='raw_mx')

# Create a TCP/IP socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# Bind the socket to the port
server_address = ('localhost', 2000)
print >>sys.stderr, 'starting up on %s port %s' % server_address
sock.bind(server_address)

# Listen for incoming connections
sock.listen(1)

renderer = p.select(dict(name="raw_mx"))
ds = renderer[0].data_source

show(p)

while True:
    # Wait for a connection
    print >>sys.stderr, 'waiting for a connection'
    connection, client_address = sock.accept()

    try:
        print >>sys.stderr, 'connection from', client_address

        while True:
            data = fromstring(connection.recv(24))
            print data

            if len(data) == 0:
                break

            rx += [data[0]]
            ry += [data[1]]
            rz += [data[2]]
            x += [counter]
            counter += 1

            ds.data["x"] = x
            ds.data["rmag_x"] = rx
            cursession().store_objects(ds)
            time.sleep(0.01)


    finally:
        # Clean up the connection
        connection.close()

我確認我已經運行了散景服務器。 我收到以下錯誤。 通過故障排除我相信這個錯誤以某種方式發生由於show(p) ，好像我評論該行我沒有錯誤，數據被發送和接收。 但是，由於show(p)不存在，因此不會更新繪圖。

--------------------------------------------------------------------------
error                                     Traceback (most recent call last)
/home/user/Documents/server.py in <module>()
     36     # Wait for a connection
     37     print >>sys.stderr, 'waiting for a connection'
---> 38     connection, client_address = sock.accept()
     39 
     40     try:

/home/user/anaconda/lib/python2.7/socket.pyc in accept(self)
    204 
    205     def accept(self):
--> 206         sock, addr = self._sock.accept()
    207         return _socketobject(_sock=sock), addr
    208     accept.__doc__ = _realsocket.accept.__doc__

error: [Errno 4] Interrupted system call

In [38]: 
(process:13045): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed

Answer 1

該錯誤是由於某些網絡設置配置錯誤導致服務器無法正常工作。 代碼現在很好用。