Python

Question

我目前正在使用 PyQt 5 和 Python 3.5 开发桌面应用程序。最近，我在尝试向布局动态添加按钮时遇到了一个问题。这是我正在做的事情：

for i in range(len(movieList)):

        movies[i][0] = QtWidgets.QLabel("Title: " + movieList[i][0])
        movies[i][0].setGeometry(30, 50, 15, 20)
        movies[i][0].setFont(self.movieTitleFont)

        self.scrollLayout.addRow(movies[i][0])

        #If the lenght is 3 it means it has 2 available resolutions
        if len(movieList[i]) == 3:

            movies[i][1] = [QtWidgets.QPushButton(movieList[i][1][1], self), QtWidgets.QPushButton(movieList[i][2][1], self)]

            movies[i][1][0].clicked.connect(lambda: self.downloadMovie(movieList[i], movieList[i][1][1]))
            movies[i][1][0].setGeometry(0, 0, 10, 20)

            movies[i][1][1].clicked.connect(lambda: self.downloadMovie(movieList[i], movieList[i][2][1]))
            movies[i][1][1].setGeometry(10, 0, 10, 20)

            self.scrollLayout.addRow(movies[i][1][0])
            self.scrollLayout.addRow(movies[i][1][1])

        else:
            movies[i][1] = [QtWidgets.QPushButton(movieList[i][1][1], self)]
            movies[i][1][0].clicked.connect(lambda: self.downloadMovie(movieList[i], movieList[i][1][1]))
            movies[i][1][0].setGeometry(30, 50, 10, 20)

            self.scrollLayout.addRow(movies[i][1][0])

我遇到的问题是，每当我的屏幕上加载了所有电影并且我尝试按下其中一个按钮来下载所述电影时，它只会采用存储的最后一个值 "i"（在 clicked.connect) 所以它将尝试下载最后显示的电影。我一直在努力寻找解决方法，但我还没有找到方法。

Answer 1

我想如果你改成partial那么一切都会好起来的

from functools import partial
...

for i in range(len(movieList)):

        movies[i][0] = QtWidgets.QLabel("Title: " + movieList[i][0])
        movies[i][0].setGeometry(30, 50, 15, 20)
        movies[i][0].setFont(self.movieTitleFont)

        self.scrollLayout.addRow(movies[i][0])

        #If the lenght is 3 it means it has 2 available resolutions
        if len(movieList[i]) == 3:

            movies[i][1] = [QtWidgets.QPushButton(movieList[i][1][1], self), QtWidgets.QPushButton(movieList[i][2][1], self)]

            movies[i][1][0].clicked.connect(partial( self.downloadMovie,movieList[i], movieList[i][1][1]))
            movies[i][1][0].setGeometry(0, 0, 10, 20)

            movies[i][1][1].clicked.connect(partial( self.downloadMovie,movieList[i], movieList[i][2][1]))
            movies[i][1][1].setGeometry(10, 0, 10, 20)

            self.scrollLayout.addRow(movies[i][1][0])
            self.scrollLayout.addRow(movies[i][1][1])

        else:
            movies[i][1] = [QtWidgets.QPushButton(movieList[i][1][1], self)]
            movies[i][1][0].clicked.connect(partial( self.downloadMovie,movieList[i], movieList[i][1][1]))
            movies[i][1][0].setGeometry(30, 50, 10, 20)

            self.scrollLayout.addRow(movies[i][1][0])

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