PyQt：如何将我的脚本转换为 GUI？

Question

我正在关注 this tutorial 的 PyQt5 GUI 窗口：

这是我在 pastebin 上的代码。

import sys
from PyQt5 import QtWidgets, QtGui


def window1():
app = QtWidgets.QApplication(sys.argv)
w = QtWidgets.QWidget()
b = QtWidgets.QPushButton('Comparison Report', w)
l1 = QtWidgets.QLabel(w)
l2 = QtWidgets.QLabel(w)
l1.setText('Main Page')
b.setGeometry(200, 100, 300, 70)
w.setWindowTitle('Diff Util')
w.setGeometry(800, 200, 720, 800)
l1.move(310, 5)
w.show()
sys.exit(app.exec_())

#import file_report

#def on_click(self):
#file_report()


window1()

这里也是 pastebin 上的比较文件脚本...但我需要 10rep 来链接它>_>

import sys
import os
import difflib

first_file = input("Select original file: ")
second_file = input("Select second file for comparison: ")

first_file_lines = open(first_file).readlines()
second_file_lines = open(second_file).readlines()

difference = difflib.HtmlDiff(tabsize=8, 
wrapcolumn=100).make_file(first_file_lines, second_file_lines, first_file, second_file, charset='utf-8')
difference_report = open('difference_report.html', 'w')
difference_report.write(difference)
difference_report.close()

os.startfile('difference_report.html')

我的问题是，如何将我的 file_report.py 连接到我用 PyQt5 创建的按钮？

如您所见，我注释掉了“import file_report”，因为据我了解，我应该导入我的脚本......但导入会导致它在终端中运行脚本，执行后将打开我的 GUI。我想运行此脚本，但将其包含在我创建的 GUI 窗口中，而不是打开终端执行。

那么我应该在 PyQt5 脚本的哪个位置导入，并包含 .py 文件？

Answer 1

GUI 对阻塞任务不友好，因为它们的存在会创建一个循环。因此不应该使用函数input()，使用库提供的元素作为QLineEdit的解决方案，PyQt也提供了选择文件的对话框。

import sys
from PyQt5 import QtWidgets, QtGui, QtCore
import difflib

class Widget(QtWidgets.QWidget):
    def __init__(self, parent=None):
        QtWidgets.QWidget.__init__(self, parent)
        self.setLayout(QtWidgets.QGridLayout())

        self.le1 = QtWidgets.QLineEdit("", self)
        self.le2 = QtWidgets.QLineEdit("", self)
        self.le3 = QtWidgets.QLineEdit("", self)
        self.btn1 = QtWidgets.QPushButton("Select first file")
        self.btn2 = QtWidgets.QPushButton("Select second file")
        self.btn3 = QtWidgets.QPushButton("Select save File")
        self.btnRun = QtWidgets.QPushButton("Run")

        self.layout().addWidget(self.le1, 1, 1)
        self.layout().addWidget(self.le2, 2, 1)
        self.layout().addWidget(self.le3, 3, 1)
        self.layout().addWidget(self.btn1, 1, 2)
        self.layout().addWidget(self.btn2, 2, 2)
        self.layout().addWidget(self.btn3, 3, 2)
        self.layout().addWidget(self.btnRun, 4, 2)
        self.btnRun.clicked.connect(self.onRun)

        self.btn1.clicked.connect(self.selectFirstFile)
        self.btn2.clicked.connect(self.selectSecondFile)
        self.btn3.clicked.connect(self.selectSaveFile)

    def selectFirstFile(self):
        filename, _ = QtWidgets.QFileDialog.getOpenFileName(self, "Select Files", QtCore.QDir.currentPath(), "*.html")
        if filename != "":
            self.le1.setText(filename)

    def selectSecondFile(self):
        filename, _ = QtWidgets.QFileDialog.getOpenFileName(self, "Select Files", QtCore.QDir.currentPath(), "*.html")
        if filename != "":
            self.le2.setText(filename)

    def selectSaveFile(self):
        filename, _ = QtWidgets.QFileDialog.getSaveFileName(self, "Select Files", QtCore.QDir.currentPath(), "*.html")
        if filename != "":
            self.le3.setText(filename)


    def onRun(self):
        first_file = self.le1.text()
        second_file = self.le2.text()
        output_file = self.le3.text()

        first_file_lines = open(first_file).readlines()
        second_file_lines = open(second_file).readlines()

        difference = difflib.HtmlDiff(tabsize=8, wrapcolumn=100).make_file(first_file_lines, second_file_lines, first_file, second_file, charset='utf-8')
        difference_report = open(output_file, 'w')
        difference_report.write(difference)
        difference_report.close()
        QtGui.QDesktopServices.openUrl(QtCore.QUrl.fromLocalFile(output_file))


if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)
    w = Widget()
    w.show()
    sys.exit(app.exec_())