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_()
