PyQt5实时汇率查询

用PyQt5实现了界面，使用urllib实时抓取ip138.com网站的汇率信息。

import sys import urllib import urllib.request from PyQt5.QtWidgets import * class Form(QDialog):     def __init__(self, parent=None):         super(Form, self).__init__(parent)         self.getdata()         comboItems = list(self.rates.keys())         textLabel = QLabel('实时汇率查询换算')         self.fromComboBox = QComboBox()         self.fromComboBox.addItems(comboItems)         self.fromSpinBox = QDoubleSpinBox()         self.fromSpinBox.setRange(0.01, 10000000.00)         self.fromSpinBox.setValue(100)         self.toComboBox = QComboBox()         self.toComboBox.addItems(comboItems)         self.toLabel = QLabel('1.00')         grid = QGridLayout()         grid.addWidget(textLabel, 0, 0)         grid.addWidget(self.fromComboBox, 1, 0)         grid.addWidget(self.fromSpinBox, 1, 1)         grid.addWidget(self.toComboBox, 2, 0)         grid.addWidget(self.toLabel, 2, 1)         self.setLayout(grid)         self.updateUi()         self.fromComboBox.currentIndexChanged.connect(self.updateUi)         self.toComboBox.currentIndexChanged.connect(self.updateUi)         self.fromSpinBox.valueChanged.connect(self.updateUi)         self.setWindowTitle('汇率  @author : likui')     def updateUi(self):         from_value = self.rates[self.fromComboBox.currentText()]         to_value = self.rates[self.toComboBox.currentText()]         money = self.fromSpinBox.value()         url = 'http://qq.ip138.com/hl.asp?from=%s&to=%s&q=%s' % (             from_value, to_value, money)         html = self.urlopen(url)         table_start = html.find('<table')         count = 5         td_begin = html.find('<td')         while count:             count -= 1             td_begin = html.find('<td', td_begin + 1)             temp = td_begin         td_end = html.find('</td>', td_begin)         amount = float(html[td_begin + 4:td_end])         self.toLabel.setText('%0.2f' % amount)     def getdata(self):         self.rates = {}         url = 'http://qq.ip138.com/hl.asp'         html = self.urlopen(url)         td_begin = html.find('<td>')         td_end = html.find('</td>', td_begin)         resource = html[td_begin:td_end]         begin = resource.find('<optgroup')         end = resource.find('</optgroup>')         option_begin = resource.find('<option', begin)         while option_begin != -1:             value = resource[option_begin + 14:option_begin + 17]             value_begin = resource.find('>', option_begin)             value_end = resource.find('<', value_begin)             rate = resource[value_begin + 1:value_end]             self.rates[rate] = value             option_begin = resource.find('<option', value_end)             if option_begin > end:                 break     def urlopen(self, url):         ret = urllib.request.Request(url)         ret.add_header('User-Agent', 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) '                                      'Chrome/41.0.2272.101 Safari/537.36')         html = urllib.request.urlopen(ret).read().decode('GB2312')         return html if __name__ == '__main__':     app = QApplication(sys.argv)     form = Form()     form.show()     app.exec_()

 

 

 

转载于:https://www.cnblogs.com/lkpp/p/7400036.html

相关资源：JAVA上百实例源码以及开源项目