问题：目前想使用pyqt，通过控制combobox在plainTextEdi上显示文本，这个已经实现，
现在我单纯地只想在_**时_下方加入下滑线，但是plainTextEdi它的font是设置全部下滑线。
如下方的02时，或者是我换其他什么模块可以解决这个问题
图如下：
第一个py文件：
import sys
from untitled9 import Ui_MainWindow
import pkgutil
from PyQt5 import QtWidgets
import PyQt5.sip
class mywindow(QtWidgets.QWidget, Ui_MainWindow): # 这个地方要注意Ui_MainWindow
def __init__(self):
super(mywindow, self).__init__()
self.setupUi(self)
if __name__=="__main__":
app=QtWidgets.QApplication(sys.argv)
myshow=mywindow()
myshow.show()#显示
sys.exit(app.exec_())
第二个
```python
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.setEnabled(True)
MainWindow.resize(1354, 942)
font = QtGui.QFont()
font.setFamily("仿宋_GB2312")
font.setPointSize(16)
font.setUnderline(False)
MainWindow.setFont(font)
#icon = QtGui.QIcon.fromTheme("按时")
# MainWindow.setWindowIcon(icon)
#MainWindow.setLayoutDirection(QtCore.Qt.LeftToRight)
#MainWindow.setAutoFillBackground(True)
#MainWindow.setToolButtonStyle(QtCore.Qt.ToolButtonTextOnly)
#MainWindow.setAnimated(False)
#MainWindow.setDocumentMode(False)
#MainWindow.setDockNestingEnabled(False)
#MainWindow.setUnifiedTitleAndToolBarOnMac(False)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setEnabled(True)
font = QtGui.QFont()
font.setFamily("黑体")
font.setPointSize(20)
font.setUnderline(False)
self.centralwidget.setFont(font)
self.centralwidget.setMouseTracking(False)
self.centralwidget.setTabletTracking(False)
self.centralwidget.setObjectName("centralwidget")
self.comboBox_5 = QtWidgets.QComboBox(self.centralwidget)
self.comboBox_5.setGeometry(QtCore.QRect(220, 656, 331, 39))
font = QtGui.QFont()
font.setFamily("黑体")
font.setPointSize(20)
font.setItalic(False)
font.setUnderline(False)
self.comboBox_5.setFont(font)
self.comboBox_5.setFocusPolicy(QtCore.Qt.NoFocus)
self.comboBox_5.setEditable(True)
self.comboBox_5.setObjectName("comboBox_5")
self.comboBox_5.addItem("")
self.comboBox_5.addItem("")
self.comboBox_5.addItem("")
self.comboBox_5.addItem("")
self.comboBox_5.addItem("")
self.pushButton_6 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_6.setGeometry(QtCore.QRect(0, 730, 551, 50))
self.pushButton_6.setFocusPolicy(QtCore.Qt.NoFocus)
self.pushButton_6.setContextMenuPolicy(QtCore.Qt.NoContextMenu)
self.pushButton_6.setAcceptDrops(False)
self.pushButton_6.setAutoDefault(False)
self.pushButton_6.setDefault(False)
self.pushButton_6.setObjectName("pushButton_6")
self.comboBox = QtWidgets.QComboBox(self.centralwidget)
self.comboBox.setGeometry(QtCore.QRect(220, 280, 331, 39))
self.comboBox.setFocusPolicy(QtCore.Qt.NoFocus)
self.comboBox.setEditable(True)
self.comboBox.setObjectName("comboBox")
self.comboBox.addItem("")
self.comboBox.addItem("")
self.comboBox_3 = QtWidgets.QComboBox(self.centralwidget)
self.comboBox_3.setGeometry(QtCore.QRect(220, 410, 331, 39))
self.comboBox_3.setFocusPolicy(QtCore.Qt.NoFocus)
self.comboBox_3.setEditable(True)
self.comboBox_3.setObjectName("comboBox_3")
self.comboBox_3.addItem("")
self.comboBox_3.addItem("")
self.comboBox_4 = QtWidgets.QComboBox(self.centralwidget)
self.comboBox_4.setEnabled(True)
self.comboBox_4.setGeometry(QtCore.QRect(220, 110, 140, 39))
self.comboBox_4.setFocusPolicy(QtCore.Qt.NoFocus)
self.comboBox_4.setContextMenuPolicy(QtCore.Qt.NoContextMenu)
self.comboBox_4.setAcceptDrops(False)
self.comboBox_4.setToolTip("")
self.comboBox_4.setLayoutDirection(QtCore.Qt.LeftToRight)
self.comboBox_4.setEditable(True)
self.comboBox_4.setObjectName("comboBox_4")
self.comboBox_4.addItem("")
self.comboBox_4.addItem("")
self.comboBox_2 = QtWidgets.QComboBox(self.centralwidget)
self.comboBox_2.setEnabled(True)
self.comboBox_2.setGeometry(QtCore.QRect(379, 110, 171, 39))
self.comboBox_2.setFocusPolicy(QtCore.Qt.NoFocus)
self.comboBox_2.setContextMenuPolicy(QtCore.Qt.NoContextMenu)
self.comboBox_2.setEditable(True)
self.comboBox_2.setObjectName("comboBox_2")
self.comboBox_2.addItem("")
self.comboBox_2.addItem("")
self.pushButton_5 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_5.setGeometry(QtCore.QRect(0, 140, 160, 50))
self.pushButton_5.setObjectName("pushButton_5")
self.pushButton_3 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_3.setGeometry(QtCore.QRect(0, 270, 160, 50))
self.pushButton_3.setObjectName("pushButton_3")
self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_2.setGeometry(QtCore.QRect(0, 410, 160, 50))
self.pushButton_2.setObjectName("pushButton_2")
self.pushButton_4 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_4.setGeometry(QtCore.QRect(0, 650, 160, 50))
self.pushButton_4.setAutoDefault(False)
self.pushButton_4.setObjectName("pushButton_4")
self.plainTextEdit = QtWidgets.QPlainTextEdit(self.centralwidget)
self.plainTextEdit.setGeometry(QtCore.QRect(580, 110, 711, 701))
font = QtGui.QFont()
font.setFamily("黑体")
font.setPointSize(20)
font.setUnderline(False)
self.plainTextEdit.setFont(font)
self.plainTextEdit.setPlainText("")
self.plainTextEdit.setObjectName("plainTextEdit")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(0, 810, 551, 50))
self.pushButton.setObjectName("pushButton")
self.comboBox.raise_()
self.comboBox_3.raise_()
self.comboBox_4.raise_()
self.comboBox_2.raise_()
self.comboBox_5.raise_()
self.pushButton_6.raise_()
self.pushButton_5.raise_()
self.pushButton_3.raise_()
self.pushButton_2.raise_()
self.pushButton_4.raise_()
self.plainTextEdit.raise_()
self.pushButton.raise_()
#MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 1354, 33))
self.menubar.setDefaultUp(True)
self.menubar.setObjectName("menubar")
#MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setSizeGripEnabled(True)
self.statusbar.setObjectName("statusbar")
#MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
self.comboBox_4.activated['QString'].connect(self.plainTextEdit.insertPlainText) # type: ignore
self.comboBox_2.activated['QString'].connect(self.plainTextEdit.insertPlainText) # type: ignore
self.comboBox.activated['QString'].connect(self.plainTextEdit.insertPlainText) # type: ignore
self.comboBox_3.activated['QString'].connect(self.plainTextEdit.insertPlainText) # type: ignore
self.comboBox_5.activated['QString'].connect(self.plainTextEdit.insertPlainText) # type: ignore
self.pushButton_6.clicked.connect(self.plainTextEdit.undo) # type: ignore
self.pushButton.clicked.connect(self.plainTextEdit.clear) # type: ignore
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "ss"))
self.comboBox_5.setItemText(0, _translate("MainWindow", "01时"))
self.comboBox_5.setItemText(1, _translate("MainWindow", "02时"))
self.comboBox_5.setItemText(2, _translate("MainWindow", "03时"))
self.comboBox_5.setItemText(3, _translate("MainWindow", "04时"))
self.comboBox_5.setItemText(4, _translate("MainWindow", "05时"))
self.pushButton_6.setText(_translate("MainWindow", "删除此行"))
self.comboBox.setItemText(0, _translate("MainWindow", "hai"))
self.comboBox.setItemText(1, _translate("MainWindow", "lei"))
self.comboBox_3.setItemText(0, _translate("MainWindow", "尽快"))
self.comboBox_3.setItemText(1, _translate("MainWindow", "好的"))
self.comboBox_4.setItemText(0, _translate("MainWindow", "谢谢"))
self.comboBox_4.setItemText(1, _translate("MainWindow", "NIH"))
self.comboBox_2.setItemText(0, _translate("MainWindow", "12113"))
self.comboBox_2.setItemText(1, _translate("MainWindow", "5123"))
self.pushButton_5.setText(_translate("MainWindow", "A"))
self.pushButton_3.setText(_translate("MainWindow", "B"))
self.pushButton_2.setText(_translate("MainWindow", "C"))
self.pushButton_4.setText(_translate("MainWindow", "E"))
self.pushButton.setText(_translate("MainWindow", "清空内容"))
```
