练习pyqt5用户界面，代码是网上两个代码拼起来的，很奇怪，运行之后，不管是点击保存，还是run，都会闪退。但是把sys.stdout那行注释掉之后，可以运行，只是 hello那些字段无法定向到界面输出框里，求大佬教一下。

import sys
from PyQt5.QtCore import*
from PyQt5.QtWidgets import QWidget, QApplication, QGroupBox, QPushButton, QLabel, QHBoxLayout, QVBoxLayout, QGridLayout, QFormLayout, QLineEdit, QTextEdit
from PyQt5.QtGui import QIcon

class Stream(QThread):

newText = pyqtSignal(str)

def write(self, text):
    self.newText.emit(str(text))

class login(QWidget):
def init(self):
super().__init__()

    sys.stdout = Stream(newText=self.onUpdateText)
    self.initUi()
    self.initUI2()
    self.show()


#
def onUpdateText(self, text):
    # Write console output to text widget.
    cursor = self.process.textCursor()
    cursor.movePosition(QTextCursor.End)
    cursor.insertText(text)
    self.process.setTextCursor(cursor)
    self.process.ensureCursorVisible()

def closeEvent(self, event):
    """Shuts down application on close."""
    # Return stdout to defaults.
    sys.stdout = sys.__stdout__
    super().closeEvent(event)
#
def initUi(self):

    self.setWindowTitle("login")
    layout = QGridLayout()
    self.setGeometry(600, 600, 400, 400)

    btnGenMast = QPushButton('Run', self)
    btnGenMast.clicked.connect(self.genMastClicked)
    self.process = QTextEdit(self, readOnly=True)
    self.process.ensureCursorVisible()
    self.process.setLineWrapColumnOrWidth(500)
    self.process.setLineWrapMode(QTextEdit.FixedPixelWidth)




    nameLabel = QLabel("姓名")
    self.nameLineEdit = QLineEdit("  ")
    sexLabel = QLabel("性别")
    self.sexLineEdit = QLineEdit(" ")
    emitLabel = QLabel("手机号")
    self.phoneLineEdit = QLineEdit("")
    timeLabel = QLabel("邮箱")
    self.mailEdit = QLineEdit("")
    # layout.setSpacing(10)
    layout.addWidget(nameLabel,1,0)
    layout.addWidget(self.nameLineEdit,1,1)
    layout.addWidget(sexLabel, 2, 0)
    layout.addWidget(self.sexLineEdit, 2, 1)
    layout.addWidget(emitLabel,3,0)
    layout.addWidget(self.phoneLineEdit,3,1)
    layout.addWidget(timeLabel,4,0)
    layout.addWidget(self.mailEdit,4,1)
    layout.setColumnStretch(1, 10)
    save_Btn = QPushButton('保存')
    cancle_Btn = QPushButton('取消')

    cancle_Btn.clicked.connect(QCoreApplication.quit)
    save_Btn.clicked.connect(self.addNum)
    layout.addWidget(save_Btn)
    layout.addWidget(cancle_Btn)
    layout.addWidget(btnGenMast)
    layout.addWidget(self.process)
    self.setLayout(layout)

def initUI2(self):


    self.setWindowIcon(QIcon('1.png'))


def printhello(self):
    print('hello')

def genMastClicked(self):
    print('Running...')

    self.printhello()
    loop = QEventLoop()
    QTimer.singleShot(2000, loop.quit)
    loop.exec_()

    print('Done.')

def addNum(self): # 获取文本框内容

    name = self.nameLineEdit.text()
    sex = self.sexLineEdit.text()
    phone = self.phoneLineEdit.text()
    mail = self.mailEdit.text()

    print('姓名: %s 性别: %s 手机号: %s 邮箱: %s ' % (name,sex, phone, mail))

if name == '__main__':

app = QApplication(sys.argv)
app.aboutToQuit.connect(app.deleteLater)
gui= login()

sys.exit(app.exec_())

恰巧3.4的py装这个比较麻烦。。盲答一下，关于python闪退，你如果走的bat打开，在bat后面加一个PAUSE，这样可以看具体运行报错内容。调试上肯定需要看到具体报错，才能决定下一步怎么做。。。我先装着，好了用你代码跑一下

self.mailEdit.setText("hello")