HelloWorld我正在尝试让QLineEdit作为用户输入开关工作，他们应该输入歌曲名。输入歌曲名称后，我希望在单击“播放”按钮后开始播放该歌曲。除此之外，其他一切正常，他们可以在该文件夹中键入任何歌曲。问题是我不确定如何使QlineEdit单词和更新每当有人的东西被输入到文本框这里是我的代码希望有人能帮助我提前谢谢！import sys

import webbrowser

import random

import time

import os

import subprocess

from PyQt4.QtCore import QSize, QTimer, SIGNAL

from PyQt4.QtGui import QApplication,QScrollBar,QLineEdit , QDialog , QFormLayout ,QGraphicsRectItem , QMainWindow, QPushButton, QWidget, QIcon, QLabel, QPainter, QPixmap, QMessageBox, QAction, QKeySequence, QFont, QFontMetrics, QMovie

from PyQt4 import QtGui

import vlc

#----|Imports End|----#

class UIWindow(QWidget):

def __init__(self, parent=None):

super(UIWindow, self).__init__(parent)

self.resize(QSize(400, 450))

self.Play = QPushButton('Play', self)

self.Play.resize(100,40)

self.Play.move(45, 100)#

self.Pause = QPushButton('Pause', self)

self.Pause.resize(100,40)

self.Pause.move(260, 100)#

self.Tbox = QLineEdit('Song name',self)

self.Tbox.resize(400,25)

self.Tbox.move(0,50)

self.Play.clicked.connect(self.PlayB)

self.Pause.clicked.connect(self.PauseB)

self.Flask = vlc.MediaPlayer("C:\Users\Matt\Music\\"+str(self.Tbox.text())+".mp3")

def PlayB(self):

self.Flask.play()

def PauseB(self):

self.Flask.stop()

class MainWindow(QMainWindow,):

def __init__(self, parent=None):

super(MainWindow, self).__init__(parent)

self.setGeometry(745 ,350 , 400, 450)

self.setFixedSize(400, 450)

self.startUIWindow()

def startUIWindow(self):

self.Window = UIWindow(self)

self.setWindowTitle("HELP ME!")

self.setCentralWidget(self.Window)

self.show()

if __name__ == '__main__':

app = QApplication(sys.argv)

w = MainWindow()

sys.exit(app.exec_())