您好我是python和PySide的新手,经过数小时的研究后,我尝试开发一个简单的GUI来显示来自API服务的一些数据。
我的程序是"简单",我实现了Qthread并且有工作线程向api发出请求并以QObject作为参数向主线程发出信号。
主线程接收信号并更新GUI。
问题是我在运行程序时出现分段错误错误。
在实现api请求之前,我尝试简单地将数字作为字符串传递并完美地工作。
我认为当我的主线程尝试访问GObject并且我的工作线程也尝试访问该对象时,我的错误就出现了。
继承我的代码:
#!/usr/bin/python
# -*- coding: utf-8 -*-
import sys
from PySide import QtGui
from PySide import QtCore
import urllib2
import json
import datetime
import time
from termcolor import colored
from blessings import Terminal
class MySig(QtCore.QObject):
sig = QtCore.Signal(QtCore.QObject)
class MyThread(QtCore.QThread):
def __init__(self, parent=None):
QtCore.QThread.__init__(self, parent)
self.exiting = 10
self.signal = MySig()
def callAping(self, jsonrpc_req):
url = "https://api.betfair.com/exchange/betting/json-rpc/v1"
headers = { 'X-Application' : '***********', 'X-Authentication' : '**************************' ,'content-type' : 'application/json' }
try:
req = urllib2.Request(url, jsonrpc_req, headers)
response = urllib2.urlopen(req)
jsonResponse = response.read()
return jsonResponse
except urllib2.URLError:
print 'Oops no service available at ' + str(url)
exit()
except urllib2.HTTPError:
print 'Oops not a valid operation from the service ' + str(url)
exit()
def getMarketBookBestOffers(self):
marketId = "1.116260985"
market_book_req = '{"jsonrpc": "2.0", "method": "SportsAPING/v1.0/listMarketBook", "params": {"marketIds":["' + marketId + '"],"priceProjection":{"priceData":["EX_BEST_OFFERS"]}}, "id": 1}'
"""
print market_book_req
"""
market_book_response = self.callAping(market_book_req)
"""
print market_book_response
"""
market_book_loads = json.loads(market_book_response)
try:
market_book_result = market_book_loads['result']
return market_book_result
except:
print 'Exception from API-NG' + str(market_book_result['error'])
exit()
def run(self):
while True:
market_book_result = self.getMarketBookBestOffers()
self.signal.sig.emit(market_book_result)
time.sleep(0.5)
class Example(QtGui.QWidget):
def __init__(self):
super(Example, self).__init__()
self.initUI()
def initUI(self):
self.selid1 = QtGui.QLabel('id', self)
self.price11 = QtGui.QLabel('0.0', self)
self.price12 = QtGui.QLabel('0.0', self)
self.hbox1=QtGui.QHBoxLayout()
self.hbox1.addWidget(self.selid1)
self.hbox1.addWidget(self.price11)
self.hbox1.addWidget(self.price12)
self.selid2 = QtGui.QLabel('id', self)
self.price21 = QtGui.QLabel('0.0', self)
self.price22 = QtGui.QLabel('0.0', self)
self.hbox2=QtGui.QHBoxLayout()
self.hbox2.addWidget(self.selid2)
self.hbox2.addWidget(self.price21)
self.hbox2.addWidget(self.price22)
self.selid3 = QtGui.QLabel('id', self)
self.price31 = QtGui.QLabel('0.0', self)
self.price32 = QtGui.QLabel('0.0', self)
self.hbox3=QtGui.QHBoxLayout()
self.hbox3.addWidget(self.selid3)
self.hbox3.addWidget(self.price31)
self.hbox3.addWidget(self.price32)
self.vbox=QtGui.QVBoxLayout()
self.vbox.addLayout(self.hbox1)
self.vbox.addLayout(self.hbox2)
self.vbox.addLayout(self.hbox3)
self.setLayout(self.vbox)
self.setGeometry(300, 300, 400, 250)
self.setWindowTitle('Absolute')
self.thread = MyThread()
self.thread.start()
self.thread.signal.sig.connect(self.changelabel)
def changelabel(self, datas):
if(datas is not None):
for marketBook in datas:
runners = marketBook['runners']
if (runners[0]['status'] == 'ACTIVE'):
self.selid1.setText(runners[0]['status'])
self.price11.setText(str(runners[0]['ex']['availableToBack'][0]['price']))
self.price12.setText(str(runners[0]['ex']['availableToLay'][0]['price']))
else:
self.selid1.setText(runners[0]['status'])
if (runners[1]['status'] == 'ACTIVE'):
self.selid2.setText(runners[1]['status'])
self.price21.setText(str(runners[1]['ex']['availableToBack'][0]['price']))
self.price22.setText(str(runners[1]['ex']['availableToLay'][0]['price']))
else:
self.selid2.setText(runners[1]['status'])
if (runners[2]['status'] == 'ACTIVE'):
self.selid3.setText(runners[2]['status'])
self.price31.setText(str(runners[2]['ex']['availableToBack'][0]['price']))
self.price32.setText(str(runners[2]['ex']['availableToLay'][0]['price']))
else:
self.selid3.setText(runners[2]['status'])
def main():
app = QtGui.QApplication(sys.argv)
ex = Example()
ex.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
抱歉我的英文
答案 0 :(得分:0)
您不需要MySig
类,并且不应将信号定义为发出QObject
,因为它与您正在发射的对象类型不匹配。
我无法测试您的示例代码,但请尝试以下操作:
class MyThread(QtCore.QThread):
sig = QtCore.Signal(object)
def __init__(self, parent=None):
QtCore.QThread.__init__(self, parent)
self.exiting = 10
...
def run(self):
...
self.sig.emit(market_book_result)
...
class Example(QtGui.QWidget):
...
def initUI(self):
...
self.thread = MyThread()
self.thread.sig.connect(self.changelabel)
self.thread.start()