Question

我正在尝试在PyQt GUI中的行编辑框中输入文件路径，然后在该文件上执行函数。我希望这可以在同一个GUI中完成。这甚至可能吗？

Answer 1

当然，您可以在同一个GUI中完成。如果要阻止用户在加载文件之前单击pbutton1按钮，可以将其属性disabled设置为True，并在加载文件后启用该按钮（例如，在调用{时{1}}功能）。我的代码中没有看到任何文件加载说明，因此首先要做的就是将文件内容保存在对象中，因此在button2Pressed中需要类似的内容：

button2Pressed

现在，当您加载文件时，您需要计算单词。 with open(self.lineedit1.text(), 'r') as my_file: self.file_content = my_file.readlines()将文件拆分为单独的行，因此您还必须执行循环来计算所有单词，因此在readlines中您可以编写例如：

button1Pressed

请注意，上面的代码只会将您的行拆分为空格（self.word_counter = 0 for line in self.file_content: for word in line.split(' ') if word == self.lineedit2.text(): counter +=1）上的单词。如果您想要删除逗号和其他符号，请考虑使用' '。我希望这会给你一个想法。干杯！

Answer 2

您的代码需要一些重新排列才能正常工作。要考虑的主要事情是将工作分成几部分，每个部分都做一件事。因此，一个方法读取文件，一个计算单词，一个输出结果等。

以下是对您的示例的基本重写，其中包含一些已做出更改的注释：

import sys, os, string
from PyQt4.QtCore import *
from PyQt4.QtGui import *

# move wordcount function into the class

class Form( QDialog):

    def __init__(self, parent=None):
        super(Form, self).__init__(parent)
        self.setWindowTitle("Word Count GUI")
        # use placeholder text
        self.lineedit2 = QLineEdit()
        self.lineedit2.setPlaceholderText('Enter Filename Here')
        self.pbutton2 = QPushButton('Press to Load File')
        # use placeholder text
        self.lineedit1 = QLineEdit()
        self.lineedit1.setPlaceholderText("Enter Word Here")
        self.pbutton1 = QPushButton("Press for Count")
        self.pbuttonQuit = QPushButton("Exit")
        # don't forget the layout...
        layout = QVBoxLayout()
        layout.addWidget(self.lineedit2)
        layout.addWidget(self.pbutton2)
        layout.addWidget(self.lineedit1)
        layout.addWidget(self.pbutton1)
        layout.addWidget(self.pbuttonQuit)
        self.setLayout(layout)
        self.pbutton2.setFocus()
        # use new-style connections
        self.pbutton1.clicked.connect(self.button1Pressed)
        self.pbutton2.clicked.connect(self.button2Pressed)
        # connect to self.close to quit
        self.pbuttonQuit.clicked.connect(self.close)
        # keep a list of lines
        self.lines = []

    def wordcount(self, word):
        total = 0
        # iterate over stored lines
        for line in self.lines:
            line = line.translate(None, string.punctuation)
            line = line.lower()
            words = line.split()
            if word in words:
                total += 1
        return total

    def button1Pressed(self):
        x1 = self.lineedit1.text()
        x1 = str(x1).lower()
        # use the wordcount method
        x2 = self.wordcount(x1)
        outtext =  str(x1) + " appears " + str(x2) + " times in the file."
        self.lineedit1.setText(outtext)

    def button2Pressed(self):
        # this reads the file and stores the lines
        g = str(self.lineedit2.text())
        g = os.path.join('/Users/xxx/Documents/Python', g)
        try:
            with open(g) as stream:
                self.lines = stream.readlines()
        except EnvironmentError as exception:
            print('ERROR: could not read file:')
            print('  : %s' % exception)
            self.lines = []

app = QApplication(sys.argv)
form = Form()
form.show()
app.exec_()

在GUI中键入文件路径并使用它在同一GUI中运行程序

2 个答案: