我有这个代码可以创建一个文本编辑窗口：
class Main(QtGui.QMainWindow):
def __init__(self, parent = None):
QtGui.QMainWindow.__init__(self, parent)
self.initUI()
print("just started the ui")
def initUI(self):
print("i am in initUi")
self.text = QtGui.QTextEdit(self)
self.setCentralWidget(self.text)
# x and y coordinates on the screen, width, height
self.setGeometry(100,100,1030,800)
self.setWindowTitle("Writer")
sleep(1)
write_msg（）函数正常，并按预期将文本写入终端。但现在我想用这个函数在QTextEdit里面写。问题是write_msg（）内部有一个while循环如果我有while循环窗口永远不会弹出，如果我删除while循环窗口弹出，编辑器就在那里我可以从我的键盘输入任何东西，但我的功能不能工作虽然它是基础。
这是我的write_msg()功能：
def write_msg():
print("i am in write_msg function")
#Each analog sensor has some characters to roll
sensor16=['1','-','\\','/','*','!']
sensor15=['4','G','H','I']
sensor14=['7','P','Q','R','S']
sensor13=['*']
sensor12=['2','A','B','C']
sensor11=['5','J','K','L']
sensor10=['8','T','U','V']
sensor09=['0',' ']
sensor08=['3','D','E','F']
sensor07=['6','M','N','O']
sensor06=['9','W','X','Y','Z']
sensor05=['#']
sensor04=['BACKSPACE']
sensor03=['DELETE ALL']
sensor02=['READ']
sensor01=['TRANSMITE']
sensor=[sensor01,sensor02,sensor03,sensor04,sensor05,sensor06,sensor07,sensor08,sensor09,sensor10,sensor11,sensor12,sensor13,sensor14,sensor15,sensor16]
#the maximum number of times each sensor can be pressed
#before it rols back to the first character.
max_press=[1,1,1,1,1,5,4,4,2,4,4,4,1,5,4,6]
num_press=0
message=[]
steps=0
i=0
x=0
key=0
key_pressed=0
#message_string="kjsdfgaqlkfvbnajkefnvbsfejfhvbjhkefrbvksjehdjefbv"
#print(message_string)
#p1 = subprocess.Popen(["minimodem" , '--tx' , '300'], stdin=subprocess.PIPE)
#p1.stdin.write(bytes(message_string, 'UTF-8'))
while state == "wrt":
print("i am looping")
binary_x="{0:04b}".format(x)
GPIO.output(15, int(binary_x[0]))
GPIO.output(13, int(binary_x[1]))
GPIO.output(11, int(binary_x[2]))
GPIO.output(7, int(binary_x[3]))
# average three readings to get a more stable one
channeldata_1 = read_mcp3002(0) # get CH0 input
sleep(0.001)
channeldata_2 = read_mcp3002(0) # get CH0 input
sleep(0.001)
channeldata_3 = read_mcp3002(0) # get CH0 input
channeldata = (channeldata_1+channeldata_2+channeldata_3)/3
#
# Voltage = (CHX data * (V-ref [= 3300 mV] * 2 [= 1:2 input divider]) / 1024 [= 10bit resolution] #
voltage = int(round(((channeldata * vref * 2) / resolution),0))+ calibration
#print(voltage)
if DEBUG : print("Data (bin) {0:010b}".format(channeldata))
#key_pressed=x
if x==15 : # some problem with this sensor so i had to go and twicked the thresshold
voltage = voltage - 500
#time.sleep(0.05)
if ( voltage > 2500) : #key is released
keypressed = False
keyreleased = True
x=x+1
if ( voltage <= 2500) : #key is pressed
keypressed = True
keyreleased = False
key_pressed=x#define which key is pressed
if key_pressed==0 and key!=0:
transmite(message)
sleep(0.01)
x=x+1
if key_pressed==1:
state == "rd_msg"
x=x+1
if key_pressed==2:
sys.stdout.write('\033[2K')
sys.stdout.write('\033[1G')
message_len = len(message)
for m in range(message_len):
del message[m]
x=x+1
if key_pressed==3:
#print('\b\b')
print('\b ', end="", flush=True)
sys.stdout.write('\010')
message_len = len(message)
del message[message_len]
sleep(1)
x=x+1
if key_pressed > 3:
print("i am pressing a number")
if key == key_pressed :
while num_press <= (max_press[key_pressed]) and keyreleased==False:
# average three readings to get a more stable one
channeldata_1 = read_mcp3002(0) # get CH0 input
sleep(0.001)
channeldata_2 = read_mcp3002(0) # get CH0 input
sleep(0.001)
channeldata_3 = read_mcp3002(0) # get CH0 input
channeldata = (channeldata_1+channeldata_2+channeldata_3)/3
#
# Voltage = (CHX data * (V-ref [= 3300 mV] * 2 [= 1:2 input divider]) / 1024 [= 10bit resolution]
#
voltage = int(round(((channeldata * vref * 2) / resolution),0))+ calibration
if DEBUG : print("Data (bin) {0:010b}".format(channeldata))
if x==15 : # some problem with this sensor so i had to go and twicked the thresshold
voltage = voltage - 500
time.sleep(0.05)
if ( voltage > 2500) : #key is released
keyreleased = True
keypressed = False
sys.stdout.write('\033[1C')
char=sensor[key_pressed][num_press-1]
message.append(char)
self.text.setText(char)
num_press=0
else :
keypressed = True
keyreleased= False
if num_press <= max_press[key_pressed] and keyreleased == False:
print(sensor[key_pressed][num_press], end="", flush=True)
sys.stdout.write('\010')
num_press=num_press+1
time.sleep(0.5)
if num_press == max_press[key_pressed] :
num_press=0
if x == 16 :
x=0
key = key_pressed
我必须不断更改x的值，将其从0增加到16，以使此功能正常工作。有人有任何想法吗？
好的！我已经尝试使用线程，所以我可以运行我的write_msg（）函数，但无法让它工作，如果我评论线程文本编辑器窗口正常弹出，没有发生任何事情，如果我取消注释它弹出输出此错误消息：pi @ raspberrypi：〜$ sudo python3 ./Documents/Examples/texting_app.py [xcb]处理回复时未知的序列号 [xcb]这很可能是一个多线程客户端，而且还没有调用XInitThreads [xcb]中止，对不起。 python3：../../ src / xcb_io.c：635：_XReply：断言`！xcb_xlib_threads_sequence_lost'失败。
这是main（）中用于启动所有内容的代码：
def main():
#t = threading.Thread(target=write_msg)
#t.daemon = True
#t.start()
app = QtGui.QApplication(sys.argv)
main = Main()
main.show()
sys.exit(app.exec_())