Python 在QLineEdit对象PyQt5上设置验证器

因此，我正在努力找到一个解决方案，为我指明正确的方向，在QLineEdit上设置一个验证器，只接受定义范围内的浮动。我已经看到了一些例子，但是我想我在语法上被绊倒了。还是很新，所以不是很有知识，也不太确定我在做什么

因此，我有一个正在开发的程序，其中GUI元素是使用Qt Designer创建的，我一直在使用Python在编译的main.ui文件转换为Python后，创建所有与ui元素交互/调用的移动部件。到目前为止，我一直在使用ui调用这些对象。（对象名称）。（一些函数/信号）

假设我想为我命名为“lineEditSHStart”的QLineEdit对象之一设置一个验证器。通常ui.lineEditsStart.（一些函数）对我来说是有效的，但我没有任何运气让验证器以这种方式工作

你打算怎么做？从我到目前为止看到的示例来看，这是通过在Python中从头创建元素来实现的，因此使用了“self.setValidator（QDoubleValidator（9999.00，-9999.00，2））的语法。到目前为止，我还没有看到任何与我的处境有关的东西

任何帮助都将不胜感激

从编译后的文件中剪切

 # -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'main.ui'
#
# Created by: PyQt5 UI code generator 5.9.2
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_Form(object):
    def setupUi(self, Form):
        Form.setObjectName("Form")
        Form.resize(1517, 905)
        Form.setMinimumSize(QtCore.QSize(1050, 905))
        Form.setMaximumSize(QtCore.QSize(2000, 905))
        self.groupBox = QtWidgets.QGroupBox(Form)
        self.groupBox.setGeometry(QtCore.QRect(30, 10, 1001, 431))
        font = QtGui.QFont()
        font.setPointSize(8)
        font.setBold(True)
        font.setWeight(75)
        self.groupBox.setFont(font)
        self.groupBox.setObjectName("groupBox")
        self.groupBoxBT = QtWidgets.QGroupBox(self.groupBox)
        self.groupBoxBT.setGeometry(QtCore.QRect(20, 40, 271, 341))
        self.groupBoxBT.setObjectName("groupBoxBT")
        self.comboBoxBT1 = QtWidgets.QComboBox(self.groupBoxBT)
        self.comboBoxBT1.setGeometry(QtCore.QRect(20, 60, 121, 22))
        self.comboBoxBT1.setCurrentText("")
        self.comboBoxBT1.setObjectName("comboBoxBT1")
        self.comboBoxBT2 = QtWidgets.QComboBox(self.groupBoxBT)
        self.comboBoxBT2.setGeometry(QtCore.QRect(20, 100, 121, 22))
        self.comboBoxBT2.setObjectName("comboBoxBT2")
        self.comboBoxBT3 = QtWidgets.QComboBox(self.groupBoxBT)
        self.comboBoxBT3.setGeometry(QtCore.QRect(20, 140, 121, 22))
        self.comboBoxBT3.setObjectName("comboBoxBT3")
        self.comboBoxBT4 = QtWidgets.QComboBox(self.groupBoxBT)
        self.comboBoxBT4.setGeometry(QtCore.QRect(20, 180, 121, 22))
        self.comboBoxBT4.setObjectName("comboBoxBT4")
        self.comboBoxBT5 = QtWidgets.QComboBox(self.groupBoxBT)
        self.comboBoxBT5.setGeometry(QtCore.QRect(20, 220, 121, 22))
        self.comboBoxBT5.setObjectName("comboBoxBT5")
        self.comboBoxBT6 = QtWidgets.QComboBox(self.groupBoxBT)
        self.comboBoxBT6.setGeometry(QtCore.QRect(20, 260, 121, 22))
        self.comboBoxBT6.setObjectName("comboBoxBT6")
        self.labelBTType = QtWidgets.QLabel(self.groupBoxBT)
        self.labelBTType.setGeometry(QtCore.QRect(60, 30, 47, 21))
        font = QtGui.QFont()
        font.setBold(False)
        font.setWeight(50)
        self.labelBTType.setFont(font)
        self.labelBTType.setObjectName("labelBTType")
        self.comboBoxBT7 = QtWidgets.QComboBox(self.groupBoxBT)
        self.comboBoxBT7.setGeometry(QtCore.QRect(20, 300, 121, 22))
        self.comboBoxBT7.setObjectName("comboBoxBT7")
        self.lineEditBT1 = QtWidgets.QLineEdit(self.groupBoxBT)
        self.lineEditBT1.setGeometry(QtCore.QRect(180, 60, 51, 20))
        self.lineEditBT1.setFocusPolicy(QtCore.Qt.ClickFocus)
        self.lineEditBT1.setInputMethodHints(QtCore.Qt.ImhNone)
        self.lineEditBT1.setText("")
        self.lineEditBT1.setCursorPosition(0)
        self.lineEditBT1.setPlaceholderText("")
        self.lineEditBT1.setClearButtonEnabled(True)
        self.lineEditBT1.setObjectName("lineEditBT1")
        self.lineEditBT2 = QtWidgets.QLineEdit(self.groupBoxBT)
        self.lineEditBT2.setGeometry(QtCore.QRect(180, 100, 51, 20))
        self.lineEditBT2.setInputMethodHints(QtCore.Qt.ImhNone)
        self.lineEditBT2.setPlaceholderText("")
        self.lineEditBT2.setClearButtonEnabled(True)
        self.lineEditBT2.setObjectName("lineEditBT2")
        self.lineEditBT3 = QtWidgets.QLineEdit(self.groupBoxBT)
        self.lineEditBT3.setGeometry(QtCore.QRect(180, 140, 51, 20))
        self.lineEditBT3.setInputMethodHints(QtCore.Qt.ImhNone)
        self.lineEditBT3.setPlaceholderText("")
        self.lineEditBT3.setClearButtonEnabled(True)
        self.lineEditBT3.setObjectName("lineEditBT3")
        self.lineEditBT4 = QtWidgets.QLineEdit(self.groupBoxBT)
        self.lineEditBT4.setGeometry(QtCore.QRect(180, 180, 51, 20))
        self.lineEditBT4.setInputMethodHints(QtCore.Qt.ImhNone)
        self.lineEditBT4.setPlaceholderText("")
        self.lineEditBT4.setClearButtonEnabled(True)
        self.lineEditBT4.setObjectName("lineEditBT4")
        self.lineEditBT5 = QtWidgets.QLineEdit(self.groupBoxBT)
        self.lineEditBT5.setGeometry(QtCore.QRect(180, 220, 51, 20))
        self.lineEditBT5.setInputMethodHints(QtCore.Qt.ImhNone)
        self.lineEditBT5.setPlaceholderText("")
        self.lineEditBT5.setClearButtonEnabled(True)
        self.lineEditBT5.setObjectName("lineEditBT5")
        self.lineEditBT6 = QtWidgets.QLineEdit(self.groupBoxBT)
        self.lineEditBT6.setGeometry(QtCore.QRect(180, 260, 51, 20))
        self.lineEditBT6.setInputMethodHints(QtCore.Qt.ImhNone)
        self.lineEditBT6.setPlaceholderText("")
        self.lineEditBT6.setClearButtonEnabled(True)
        self.lineEditBT6.setObjectName("lineEditBT6")
        self.lineEditBT7 = QtWidgets.QLineEdit(self.groupBoxBT)
        self.lineEditBT7.setGeometry(QtCore.QRect(180, 300, 51, 20))
        self.lineEditBT7.setInputMethodHints(QtCore.Qt.ImhNone)
        self.lineEditBT7.setPlaceholderText("")
        self.lineEditBT7.setClearButtonEnabled(True)
        self.lineEditBT7.setObjectName("lineEditBT7")
        self.labelBTQuanity = QtWidgets.QLabel(self.groupBoxBT)
        self.labelBTQuanity.setGeometry(QtCore.QRect(170, 30, 81, 21))

main.py

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QMessageBox
import gui_main
import numpy as np 



#==========================================
# create app and main window + dialog GUI
# =========================================

app = QApplication(sys.argv)



window = QWidget()
ui = gui_main.Ui_Form()
ui.setupUi(window)


#========================================
# GUI event handler and related functions
# =======================================

def calcTotalDynamicHead():        # Define function to compute all calculations based off user input variables when "calculate" button is pressed
    
    # Creating a dictionary of key/value pairs from the items chosen from the combo boxes and their corresponding quanities 
    btList = {ui.comboBoxBT1.currentText() : ui.lineEditBT1.text(), ui.comboBoxBT2.currentText() : ui.lineEditBT2.text(), ui.comboBoxBT3.currentText() : ui.lineEditBT3.text(), ui.comboBoxBT4.currentText() : ui.lineEditBT4.text(), ui.comboBoxBT5.currentText() : ui.lineEditBT5.text(), ui.comboBoxBT6.currentText() : ui.lineEditBT6.text(), ui.comboBoxBT7.currentText() : ui.lineEditBT7.text()}
    
    # Creating a dictionary of variable pairs of item types and their straight length conversion factors
    conversionBT = {'Standard Tee':'5.7133', 'Through Tee': '1.7893', 'Standard Elbow': '2.6701', 'Medium Sweep Elbow': '2.258', 'Long Sweep Elbow': '1.7893', '45 Degree Bend': '1.2308'}
    
    # Creating a dictionary of variable pairs from the items chosen from the combo boxes and their corresponding quanities
    valveList = {ui.comboBoxV1.currentText() : ui.lineEditV1.text(), ui.comboBoxV2.currentText() : ui.lineEditV2.text(), ui.comboBoxV3.currentText() : ui.lineEditV3.text(), ui.comboBoxV4.currentText() : ui.lineEditV4.text(), ui.comboBoxV5.currentText() : ui.lineEditV5.text(), ui.comboBoxV6.currentText() : ui.lineEditV6.text(), ui.comboBoxV7.currentText() : ui.lineEditV7.text() }
    
    # Creating a dictionary of variable pairs of item types and their straight length conversion factors
    conversionValve = {'Globe Valve' : '28.716', 'Swing Check Valve' : '6.7493', 'Gate Valve Open' : '0.5668', 'Gate Valve 3/4 Closed' : '71.126', 'Gate Valve 1/2 Closed' : '16.971', 'Gate Valve 1/4 Closed' : '3.3958', 'Plug Valve': '7.179'}
    
    # Grabbing all necessary variables from ui elements for calculations and error handling
    totalStraightPipe = ui.lineEditPipeLen.text()
    pipeDia = ui.lineEditDia.text()
    startEle = ui.lineEditSHStart.text()
    endEle = ui.lineEditSHEnd.text()
    highPt = ui.lineEditSHHigh.text()
    targetFlow = ui.lineEditFHTarget.text()
    minFlow = ui.lineEditFHMin.text()
    maxFlow = ui.lineEditFHMax.text()
    kVal = ui.lineEditFHKvalue.text()
    cFactor = ui.lineEditFHCfac.text()
    minVel = ui.spinBoxFHVelMin.value()  
    maxVel = ui.spinBoxFHVelMax.value() 
    
    # Creating empty lists and dictionaries for storing calculated values
    btCalcs = []
    valveCalcs = []
    calcFlows = {}
    

    try: 
        # Loop through the Bends and Tees combo boxes and look for selections in order to convert items to their straight length equivalents 
        for item in btList:
            
            if item != '' :
                
                quanity = btList[item]
                
                eqLenPerFit = float(conversionBT[item]) * int(pipeDia)
        
                totalEqLen = float(eqLenPerFit) * float(quanity)
                
                btCalcs.append(totalEqLen)
              
            else:
                
                pass
        
        # Loop through the Valve combo boxes and look for selections in order to covert items to their straight length equivalents
        for item in valveList:
            
            if item != '':
                
                quanity = valveList[item]
                
                eqLenPerValve = float(conversionValve[item]) * int(pipeDia)
                
                totalEqLen = float(eqLenPerValve) * float(quanity)
                
                valveCalcs.append(totalEqLen)
                
            else:
                
                pass
            
        # Sum all the converted straight length values appended to the Bends and Tees list
        totalBt = sum(map(float,btCalcs))
        
        # Sum all the converted straight length values appened to the Valves list
        totalValves = sum(map(float, valveCalcs))
        
        # Calculate the total equivalnet length for all Bends and Tees, Valves, and Straight Pipe Segment
        totalEqLength = totalBt + totalValves + float(totalStraightPipe)
        
        # Calculate the Static Head 
        if endEle < highPt:
            staticHead = float(highPt) - float(startEle)
        else:
            staticHead = float(endEle) - float(startEle)
        
        # Create a list of defined flow rates from the user input Min and Max Flows in order to perform calculations for each flow rate
        flowList = np.arange(int(minFlow),int(maxFlow)+1, 100)
        
        # Loop through the defined flow ranges and calculate the Head Loss per 100ft, Velocity, Velocity Head, Friction Head, and Total Dynamic Head for each flow rate
        for flow in flowList:
           
            # Create an empty dictionary with each flow rate as a key and an empty list for storing corresponding calculated values. Plan on expanding in the future and will be nice to have all this info in a nice callable place
            calcFlows.update({flow: []})
            
            # Calculate Head Loss per 100ft
            headLoss = 2.083 * (100/int(cFactor))**1.85 * (int(flow)**1.85/int(pipeDia)**4.8655)
            
            # Calculate velocity
            velocity = (int(flow)/448.8)/(3.14159*(int(pipeDia)/24)**2)
            
            # Calculate Velocity Head
            velocityHead = int(velocity)**2 / 64.4
            
            # Calculate Friction Head
            frictionHead = int(totalEqLength) * (headLoss/1000) + (velocityHead * int(kVal))
            
            # Calculate Total Dynamic Head
            totalDynamicHead = float(staticHead) + float(frictionHead)
            
            # Append each calculation to it's corresponding flow key in the dictionary 
            calcFlows[flow].append(headLoss)
            calcFlows[flow].append(velocity)
            calcFlows[flow].append(velocityHead)
            calcFlows[flow].append(frictionHead)
            calcFlows[flow].append(totalDynamicHead)
    
        # Update all the corresponding ui elements with their calculated value
        ui.lineEditTotalEqLen.setText("{:.2f} ft".format(totalEqLength))
        ui.lineEditStaticHead.setText("{:.2f} ft".format(staticHead))
        ui.lineEditFHHeadLoss.setText("{:.2f} ft".format(calcFlows[int(targetFlow)][0]))
        ui.lineEditFHVelocity.setText("{:.2f} ft/sec".format(calcFlows[int(targetFlow)][1]))
        ui.lineEditFHVelHead.setText("{:.2f} v**2/(2g)".format(calcFlows[int(targetFlow)][2]))
        ui.lineEditFHFrictionHead.setText("{:.2f} ft".format(calcFlows[int(targetFlow)][3]))
        ui.lineEditTotalDynHead.setText("{:.2f} ft".format(calcFlows[int(targetFlow)][4]))
        
        # Checking if the calculated velocity falls within the user defined range, turns the lineEdit object green/red
        if int(minVel) < calcFlows[int(targetFlow)][1] < int(maxVel):
            ui.lineEditFHVelocity.setStyleSheet("background-color: rgb(0, 170, 0);")
        else:
            ui.lineEditFHVelocity.setStyleSheet("background-color: rgb(255, 0, 0);")
        
        # plots all calculated total dynamic head values per flow rates into graph 
        x = flowList
        y = [calcFlows[key][-1] for key in calcFlows.keys()] 
        ui.graphWidget.plot(x,y, name = targetFlow, symbol='o', symbolSize=10)
    

    # Error handling / Checks for any empty lineEdit(s) and notifies user through a dialog box and hightlights corresponding box red 
    except:
        
        if pipeDia == '':
            ui.lineEditDia.setStyleSheet("background-color: rgb(255, 0, 0);")
            QMessageBox.information(window,"Information", "Missing Pipe Diameter", QMessageBox.Ok)
        elif totalStraightPipe == '':
            ui.lineEditPipeLen.setStyleSheet("background-color: rgb(255, 0, 0);")
            QMessageBox.information(window,"Information", "Missing Straight Pipe Segment Length", QMessageBox.Ok)
        elif startEle == '.':
            ui.lineEditSHStart.setStyleSheet("background-color: rgb(255, 0, 0);")
            QMessageBox.information(window,"Information", "Missing Starting Elevation", QMessageBox.Ok)
        elif endEle == '.':
            ui.lineEditSHEnd.setStyleSheet("background-color: rgb(255, 0, 0);")
            QMessageBox.information(window,"Information", "Missing Ending Elevation", QMessageBox.Ok)
        elif targetFlow == '':
            ui.lineEditFHTarget.setStyleSheet("background-color: rgb(255, 0, 0);")
            QMessageBox.information(window,"Information", "Missing Target Flow", QMessageBox.Ok)
        elif minFlow == '':
            ui.lineEditFHMin.setStyleSheet("background-color: rgb(255, 0, 0);")
            QMessageBox.information(window,"Information", "Missing Minimum Flow", QMessageBox.Ok)
        elif maxFlow == '':
            ui.lineEditFHMax.setStyleSheet("background-color: rgb(255, 0, 0);")
            QMessageBox.information(window,"Information", "Missing Maximum Flow", QMessageBox.Ok)
        elif kVal  == '':
            ui.lineEditFHKvalue.setStyleSheet("background-color: rgb(255, 0, 0);")
            QMessageBox.information(window,"Information", "Missing K Value", QMessageBox.Ok)
        elif cFactor  == '':
            ui.lineEditFHCfac.setStyleSheet("background-color: rgb(255, 0, 0);")
            QMessageBox.information(window,"Information", "Missing C Factor Value", QMessageBox.Ok)
            
            
# Event handling functions for returning lineEdit object backgrounds to white after a missing value has been entered      
def resetlineEditDia():
    ui.lineEditDia.setStyleSheet("background-color: rgb(255,255,255);")

def resetlineEditPipeLen():
    ui.lineEditPipeLen.setStyleSheet("background-color: rgb(255,255,255);") 

def resetlineEditSHStart():
    ui.lineEditSHStart.setStyleSheet("background-color: rgb(255,255,255);")
    
def resetlineEditSHEnd():
    ui.lineEditSHEnd.setStyleSheet("background-color: rgb(255,255,255);")
    
def resetlineEditFHTarget():
     ui.lineEditFHTarget.setStyleSheet("background-color: rgb(255,255,255);")
     
def resetlineEditFHMin():
    ui.lineEditFHMin.setStyleSheet("background-color: rgb(255,255,255);")
    
def resetlineEditFHMax():
    ui.lineEditFHMax.setStyleSheet("background-color: rgb(255,255,255);")

def resetlineEditFHKvalue():
    ui.lineEditFHKvalue.setStyleSheet("background-color: rgb(255,255,255);")

def resetlineEditFHCfac():
    ui.lineEditFHCfac.setStyleSheet("background-color: rgb(255,255,255);")    


#==========================================
# connect signals
#==========================================
    
# Connecting button press to calculate function
ui.calcTotalDynHeadBt.clicked.connect(calcTotalDynamicHead)

# Connecting text change signals to background resets
ui.lineEditDia.textChanged.connect(resetlineEditDia)
ui.lineEditPipeLen.textChanged.connect(resetlineEditPipeLen)
ui.lineEditSHStart.textChanged.connect(resetlineEditSHStart)
ui.lineEditSHEnd.textChanged.connect(resetlineEditSHEnd)
ui.lineEditFHTarget.textChanged.connect(resetlineEditFHTarget)
ui.lineEditFHMin.textChanged.connect(resetlineEditFHMin)
ui.lineEditFHMax.textChanged.connect(resetlineEditFHMax)
ui.lineEditFHKvalue.textChanged.connect(resetlineEditFHKvalue)
ui.lineEditFHCfac.textChanged.connect(resetlineEditFHCfac)



# Bends and Tees Combo Box Options
ui.comboBoxBT1.addItems(['', 'Standard Tee', 'Through Tee', 'Standard Elbow', 'Medium Sweep Elbow', 'Long Sweep Elbow', '45 Degree Bend'])
ui.comboBoxBT2.addItems(['', 'Standard Tee', 'Through Tee', 'Standard Elbow', 'Medium Sweep Elbow', 'Long Sweep Elbow', '45 Degree Bend'])
ui.comboBoxBT3.addItems(['', 'Standard Tee', 'Through Tee', 'Standard Elbow', 'Medium Sweep Elbow', 'Long Sweep Elbow', '45 Degree Bend'])
ui.comboBoxBT4.addItems(['', 'Standard Tee', 'Through Tee', 'Standard Elbow', 'Medium Sweep Elbow', 'Long Sweep Elbow', '45 Degree Bend'])
ui.comboBoxBT5.addItems(['', 'Standard Tee', 'Through Tee', 'Standard Elbow', 'Medium Sweep Elbow', 'Long Sweep Elbow', '45 Degree Bend'])
ui.comboBoxBT6.addItems(['', 'Standard Tee', 'Through Tee', 'Standard Elbow', 'Medium Sweep Elbow', 'Long Sweep Elbow', '45 Degree Bend'])
ui.comboBoxBT7.addItems(['', 'Standard Tee', 'Through Tee', 'Standard Elbow', 'Medium Sweep Elbow', 'Long Sweep Elbow', '45 Degree Bend'])

# Valves Combo Box Options
ui.comboBoxV1.addItems(['', 'Globe Valve', 'Swing Check Valve', 'Gate Valve Open', 'Gate Valve 3/4 Closed', 'Gate Valve 1/2 Closed', 'Gate Valve 1/4 Closed', 'Plug Valve'])
ui.comboBoxV2.addItems(['', 'Globe Valve', 'Swing Check Valve', 'Gate Valve Open', 'Gate Valve 3/4 Closed', 'Gate Valve 1/2 Closed', 'Gate Valve 1/4 Closed', 'Plug Valve'])
ui.comboBoxV3.addItems(['', 'Globe Valve', 'Swing Check Valve', 'Gate Valve Open', 'Gate Valve 3/4 Closed', 'Gate Valve 1/2 Closed', 'Gate Valve 1/4 Closed', 'Plug Valve'])
ui.comboBoxV4.addItems(['', 'Globe Valve', 'Swing Check Valve', 'Gate Valve Open', 'Gate Valve 3/4 Closed', 'Gate Valve 1/2 Closed', 'Gate Valve 1/4 Closed', 'Plug Valve'])
ui.comboBoxV5.addItems(['', 'Globe Valve', 'Swing Check Valve', 'Gate Valve Open', 'Gate Valve 3/4 Closed', 'Gate Valve 1/2 Closed', 'Gate Valve 1/4 Closed', 'Plug Valve'])
ui.comboBoxV6.addItems(['', 'Globe Valve', 'Swing Check Valve', 'Gate Valve Open', 'Gate Valve 3/4 Closed', 'Gate Valve 1/2 Closed', 'Gate Valve 1/4 Closed', 'Plug Valve'])
ui.comboBoxV6.addItems(['', 'Globe Valve', 'Swing Check Valve', 'Gate Valve Open', 'Gate Valve 3/4 Closed', 'Gate Valve 1/2 Closed', 'Gate Valve 1/4 Closed', 'Plug Valve'])
ui.comboBoxV7.addItems(['', 'Globe Valve', 'Swing Check Valve', 'Gate Valve Open', 'Gate Valve 3/4 Closed', 'Gate Valve 1/2 Closed', 'Gate Valve 1/4 Closed', 'Plug Valve'])

# Graph styling
ui.graphWidget.setTitle("STORAGE FEED SYSTEM CURVE", color="k", size="18pt")
ui.graphWidget.setBackground('w')
ui.graphWidget.setLabel("left", "TDH (FT)", color="k", size="16pt")
ui.graphWidget.setLabel("bottom", "Flow Rate (GPM per pump)", color="k", size="16pt")
ui.graphWidget.showGrid(x=True, y=True)
ui.graphWidget.addLegend()

#=======================================
# run app
#=======================================
window.show()
sys.exit(app.exec_())

导入系统 从PyQt5.QtWidgets导入QApplication、QWidget、QMessageBox 导入gui_main 将numpy作为np导入 #========================================== #创建应用程序和主窗口+对话框GUI # ========================================= app=QApplication（sys.argv） window=QWidget（） ui=gui\u main.ui\u Form（） ui.setupUi（窗口） #======================================== #GUI事件处理程序和相关函数 # ======================================= def CALCTOTALDYNACHEAD（）：#定义函数以在按下“计算”按钮时根据用户输入变量计算所有计算 #从组合框中选择的项及其相应数量创建键/值对字典 btList={ui.comboBoxBT1.currentText（）：ui.lineEditBT1.text（），ui.ComboxBT2.currentText（）：ui.lineEditBT2.text（），ui.ComboxBT3.currentText（）：ui.lineEditBT3.text（），ui.ComboxBT4.currentText（）：ui.lineEditBT4.text（），ui.ComboxBT5.currentText（）：ui.lineEditBT5.text（），ui.ComboxBT6.currentText（）：ui.lineEditBT6.text（），ui.comboBoxBT7.currentText（）：ui.lineEditBT7.text（）} #创建项目类型及其直线长度转换因子的变量对字典 转换bt={‘标准三通’：‘5.7133’，‘直通三通’：‘1.7893’，‘标准弯头’：‘2.6701’，‘中扫弯头’：‘2.258’，‘长扫弯头’：‘1.7893’，‘45度弯头’：‘1.2308’} #从组合框中选择的项目及其相应数量创建变量对字典 valveList={ui.comboBoxV1.currentText（）：ui.lineEditV1.text（），ui.ComboxV2.currentText（）：ui.lineEditV2.text（），ui.ComboxV3.currentText（）：ui.lineEditV3.text（），ui.ComboxV4.currentText（）：ui.lineEditV4.text（），ui.ComboxV5.currentText（）：ui.lineEditV5.text（），ui.ComboxV6.currentText（）：ui.lineEditV6.text（），ui.comboBoxV7.currentText（）：ui.lineEditV7.text（）} #创建项目类型及其直线长度转换因子的变量对字典 转换阀={‘截止阀’：‘28.716’，‘旋启式止回阀’：‘6.7493’，‘闸阀开启’：‘0.5668’，‘闸阀3/4关闭’：‘71.126’，‘闸阀1/2关闭’：‘16.971’，‘闸阀1/4关闭’：‘3.3958’，‘旋塞阀’：‘7.179’} #从ui元素中获取所有必要的变量以进行计算和错误处理 totalStraightPipe=ui.lineEditPipeLen.text（） pipeDia=ui.lineedidia.text（） startEle=ui.lineeditsstart.text（） endEle=ui.lineEditSHEnd.text（） highPt=ui.lineeditshigh.text（） targetFlow=ui.lineEditFHTarget.text（） minFlow=ui.lineEditFHMin.text（） maxFlow=ui.lineEditFHMax.text（） kVal=ui.lineEditFHKvalue.text（） cFactor=ui.lineEditFHCfac.text（） minVel=ui.spinBoxFHVelMin.value（） maxVel=ui.spinBoxFHVelMax.value（） #创建用于存储计算值的空列表和字典 btCalcs=[] valveCalcs=[] 计算流量={} 尝试： #在“折弯”和“T形三通”组合框中循环并查找选项，以便将项目转换为其直线长度等效项 对于btList中的项目： 如果项目！=''： 数量=btList[项目] eqLenPerFit=float（转换BT[项目]）*int（管道直径） totalEqLen=浮动（eqLenPerFit）*浮动（数量） btCalcs.append（totalEqLen） 其他： 通过 #在阀组合框中循环并查找选项，以便将项目转换为其直线长度等效项 对于valveList中的项目： 如果项目！=''： 数量=阀门列表[项目] eqLenPerValve=浮子（转换阀[项目]）*int（管道直径） totalEqLen=浮动（eqLenPerValve）*浮动（数量） valveCalcs.append（totalEqLen） 其他： 通过 #将附加到“折弯和T形三通”列表中的所有转换直线长度值相加 totalBt=总和（映射（浮动，btCalcs）） #求阀门列表中所有转换后的直线长度值之和 totalValves=总和（图（浮子、阀门） #计算所有弯头和三通、阀门和直管段的总等效净长度 totalEqLength=totalBt+tot

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>Form</class>
 <widget class="QWidget" name="Form">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>400</width>
    <height>300</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>Form</string>
  </property>
  <layout class="QVBoxLayout" name="verticalLayout">
   <item>
    <widget class="QLineEdit" name="lineEditSHStart"/>
   </item>
   <item>
    <widget class="QPushButton" name="action_button">
     <property name="text">
      <string>PushButton</string>
     </property>
    </widget>
   </item>
  </layout>
 </widget>
 <resources/>
 <connections/>
</ui>

from PyQt5 import QtWidgets, QtCore, QtGui
import sys

import window  # Import convert .ui file.


class Window(QtWidgets.QWidget):
    def __init__(self, parent=None):
        super(Window, self).__init__(parent)
        self.ui = window.Ui_Form()
        self.ui.setupUi(self)

        validator = QtGui.QDoubleValidator()  # Create validator.
        validator.setRange( -10.0, 9999.0, 2)
        self.ui.lineEditSHStart.setValidator(validator)  # Set validator.
 

if __name__ == '__main__':
    
    app = QtWidgets.QApplication(sys.argv)
    win = Window()
    win.show()
    app.exec_()