我需要你的建议和帮助我的代码。
我正在制作一个GUI程序。基本上该程序执行以下操作:
如图所示,它需要来自用户的4个输入,(1)var1的任何整数,(2)var2的任何整数,(3)运算符(加法或减法)和(4)单击按钮。
GUI是使用QtDesigner设计的。
这是我的代码:
import sys
import sqlite3
from PyQt4 import QtCore, QtGui
from testgui import Ui_MainWindow
class ShowAndInput(QtGui.QMainWindow):
def __init__(self, parent=None):
QtGui.QWidget.__init__(self, parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
#connect to the database
self.connect_to_db()
#create table in the database
self.create_table()
#add items to the comboBox
self.add_items()
#calculate button to start calculating, gives signal to the next class Calculate
self.ui.pushButton_3.clicked.connect(self.calculate)
#close button to close the window
QtCore.QObject.connect(self.ui.pushButton,QtCore.SIGNAL("clicked()"), quit)
self.conn.close()
def connect_to_db(self):
self.conn = sqlite3.connect('testguidb.sqlite3')
self.cur = self.conn.cursor()
def create_table(self):
self.cur.execute('''CREATE TABLE IF NOT EXISTS Input (var1 INTEGER, var2 INTEGER)''')
self.conn.commit()
def add_items(self):
lst = ['addition', 'subtraction']
self.ui.comboBox.clear()
self.ui.comboBox.addItems(lst)
def calculate(self):
calculate = Calculate(self)
calculate.exec_()
因此,第一个类的目的是显示GUI并从用户那里获取输入。如果用户单击名为“Calculate”的按钮,它应该连接到名为“Calculate”的新类。
这是我的Calculate类的代码:
class Calculate(QtGui.QMainWindow):
def __init__(self, parent = None):
QtGui.QWidget.__init__(parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
#validator to validate that the input is integer or digit
#connect to database
self.connect_to_db()
#get the input values and store them in the database
self.get_the_values()
#print the output
PrintOutcome()
def connect_to_db(self):
self.conn = sqlite3.connect('testguidb.sqlite3')
self.cur = self.conn.cursor()
def get_the_values(self):
dicti = {}
dicti['var1'] = self.ui.lineEdit.text()
dicti['var2'] = self.ui.lineEdit_2.text()
for key, val in sorted(dicti.items()):
key = str(key)
val = int(val)
self.cur.execute('INSERT OR IGNORE INTO Input (?) VALUES (?)',(key,val))
self.conn.commit()
在这个类的最后,它调用另一个名为'PrintOutcome'的类来打印QTextBrowser中的结果。这是代码的最后一部分:
class PrintOutcome(QtGui.QMainWindow):
def __init__(self, parent = None):
QtGui.QWidget.__init__(parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
#connect to database
self.connect_to_db()
#get the value of the combobox
self.get_combox()
#print the output
if self.operator == 'addition': self.print_add()
elif self.operator == 'subtraction': self.print_sub()
def connect_to_db(self):
self.conn = sqlite3.connect('testguidb.sqlite3')
self.cur = self.conn.cursor()
def get_combox(self):
self.operator = str(self.ui.comboBox.currentText())
def print_add(self):
dicti={}
for i in range(2):
i = i + 1
dicti['var{0}'.format(i)] = self.cur.execute('SELECT var{0} FROM Input'.format(i))
dicti['var{0}'.format(i)] = int(self.cur.fetchone()[0])
text = str(dicti['var{0}'.format(i)])
self.ui.textBrowser.append(text)
result = dicti['var1'] + dicti['var2']
textsep = '-'*25+'(+)'
text = str(result)
self.ui.textBrowser.append(text)
self.ui.textBrowser.append(text)
def print_sub(self):
dicti={}
for i in range(2):
i = i + 1
dicti['var{0}'.format(i)] = self.cur.execute('SELECT var{0} FROM Input'.format(i))
dicti['var{0}'.format(i)] = int(self.cur.fetchone()[0])
text = str(dicti['var{0}'.format(i)])
self.ui.textBrowser.append(text)
result = dicti['var1'] + dicti['var2']
textsep = '-'*25+'(-)'
text = str(result)
self.ui.textBrowser.append(text)
self.ui.textBrowser.append(text)
if __name__=='__main__':
app = QtGui.QApplication(sys.argv)
myapp = ShowAndInput()
myapp.show()
sys.exit(app.exec_())
当我跑步时,一切都很好。但是当我按下计算按钮时,它返回了一条错误消息。
以下是错误消息:RuntimeError:从未调用过计算类型的超类 init ()。
任何回应都将不胜感激。非常感谢。
此致
阿诺德