我有一个程序,其中包含两个非常简单的线程:
当程序开始运行时,显示绘图,一切正常。问题是,只要用户输入键盘,程序就会崩溃,并出现致命错误导致Python退出。
您有什么提示或经验,可以解释为什么
我在
错误信息:
或者是这个错误:
- 一个用于监听串口
- 一个用于文本UI
main()
中运行matplotlib
animation
。它有一个scope
类,这是从matplotlib示例中获取的。当程序开始运行时,显示绘图,一切正常。问题是,只要用户输入键盘,程序就会崩溃,并出现致命错误导致Python退出。
ui
线程与matplotlib
和scope
类没有关系。如果删除创建绘图的代码,则ui
线程没有问题,程序顺畅运行。我还注意到,我的系统上的matplotlib
使用tkinter
创建窗口。您有什么提示或经验,可以解释为什么
matplotlib
animation
会引起问题吗?线程是否不能与matplotlib
plot
一起使用?我在
Windows7
命令行窗口中运行此程序,使用的是Python 2.7
。
matplotlib
版本:2.0.2
Tkinter
版本:8.5错误信息:
Fatal Python error: GC object already tracked
This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.
或者是这个错误:
TclStackFree: incorrect freePtr. Call out of sequence?
This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.
代码:
import threading
import serial
from matplotlib.lines import Line2D
import matplotlib.pyplot as plt
import matplotlib.animation as animation
class listner(threading.Thread):
def __init__(self,port):
threading.Thread.__init__(self)
self.sport=None
self.is_running=True
self.init_port(port)
def run(self):
print ' Reading from Port'
while self.is_running:
try:
self.sport.read(1)
except:
print 'Error reading port'
def init_port(self,port):
print '1'
if self.sport==None or not self.sport.is_open :
try:
self.sport = serial.Serial(port,115200)
self.sport.timeout = 1
self.sport.reset_input_buffer()
self.sport.reset_output_buffer()
self.port_open=True
except:
print " Port error Listener Initing\n",self.port_open,'\n',self.sport
else:
pass
def process(self):
pass
class ui(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
self.running = True
def run(self):
print 'Starting UI:\n'
while self.running:
print ' Enter input ''S'':\n'
user = raw_input()
def main(port):
listner_thread = None
try:
listner_thread = listner(port)
listner_thread.start();
except:
print "Listener Thread Failed To Start"
return
ui_thread=None
try:
ui_thread = ui()
ui_thread.start()
except:
print "UI Thread Failed To Start"
return
run_charts()
def run_charts():
fig, (ax1, ax2) = plt.subplots(2, 1)
scope1 = Scope(ax1)
ani1 = animation.FuncAnimation(fig, scope1.update, emit_ch1, interval=10,blit=True)
scope2 = Scope(ax2)
ani2 = animation.FuncAnimation(fig, scope2.update, emit_ch2, interval=10,blit=True)
plt.show()
def emit_ch1():
yield 0.001
def emit_ch2():
yield -0.001
class Scope(object):
def __init__(self, ax, maxt=2, dt=0.02):
self.ax = ax
self.dt = dt
self.maxt = maxt
self.tdata = [0]
self.ydata = [0]
self.line = Line2D(self.tdata, self.ydata)
self.ax.add_line(self.line)
self.ax.set_ylim(-.009, 0.009)
self.ax.set_xlim(0, self.maxt)
def update(self, y):
t = self.tdata[-1] + self.dt
self.tdata.append(t)
self.ydata.append(y)
self.line.set_data(self.tdata, self.ydata)
return self.line,
if __name__ == '__main__':
main('COM11')
AttributeError: type object 'listner' has no attribute 'listner'
因为这行代码:listner_thread = listner.listner(port)
你确定提供的代码是在用户按下键之前可以正常工作的代码吗? - timotree