从socket到TKin绘制数据时从pickle返回eoferor

Question

对于高级设计，我让labview将编码器位置发送到另一个python脚本，该脚本接收这些位置并执行正向运动学并实现触觉边界。我需要获取这些数据并制作一个GUI。但我得到了这个错误。有什么想法吗？在

在-GUIserver.py在

# Echo server program
import socket
import pickle 
import Tkinter


HOST = 'localhost'                 # Symbolic name meaning all available interfaces
PORT = 5000              # Arbitrary non-privileged port
addr = (HOST,PORT)

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(('', PORT))
s.listen(1)
conn, addr = s.accept()
print 'Connected by', addr
data = conn.recv(1024)
print(data)
conn.sendall("Welcome Haptic Client: Please send bounrary array via encoded pickle")
data = conn.recv(1024)
boundaryarray = pickle.loads(data)
print repr(boundaryarray)
conn.sendall("GUI loading")


root = Tkinter.Tk()
root.title("Haptic GUI")
w = Tkinter.Canvas(root, width=640, height=480)
w.pack()

#For loops to write all boundary data 
for x,y in boundaryarray:
    print x
previousx = x
print y
previousy = y
firstx = x
firsty = y
del boundaryarray[0]
break
for x,y in boundaryarray:
print x
print y
print str(previousx) + "x previous"
print str(previousy) + " y previous"
w.create_line(previousx, previousy, x, y, fill="red")
previousx = x
previousy = y

w.create_line(boundaryarray[-1], boundaryarray[-1], firstx, firsty, fill="red")


conn.sendall("The boundary has been plotted, read to take pen data. Send me the current point and the point before that only if the pen array is longer then 2 element")
conn.sendall("To shut down the GUI and socket, send GUI SERVER OFF")

while True:
data = conn.recv(1024)
if data == "GUI SERVER OFF":
    break
penarray = pickle.loads(str(data))
for x,y in boundaryarray:
    firstx = x
    firsty = y
    del boundaryarray[0]
    break
for x,y in boundaryarray:
    secondx = x
    secondy = y
w.create_line(firstx, firsty, secondy, secondx, fill="red")
w.canvas.draw()

conn.sendall("plotted")


root.mainloop()

在-hapticlient.py在

^{pr2}$

Answer 1

如果不将整个字符串传递给pickle，而只传递其中的一部分，则会发生EOFError。 当使用conn.recv(1024)从套接字读取不完整的字符串时，可能会发生这种情况。在

我会改变的

data = conn.recv(1024)
boundaryarray = pickle.loads(data)

因为conn.recv(1024)接收0到1024个字节。我会把它换成

^{pr2}$

因为它能读到泡菜想要的一切，而不是更多而不是更少。在

如果你把东西扔了

f = conn.makefile("w")
boundaryarray = pickle.dump(...)

带着文件。在

我也会重新考虑这个：Python implementing simple web data storage