当前环境：Win10 x64 + Python 3.8.10 + PyQt==5.15.2 + PyQt-tools==5.15.9.33

1 打开 designer.exe ,新建一个 Dialog without Buttons , 设计窗体。
C:\Python\Python38-32\Lib\site-packages\qt5_applications\Qt\bin\designer.exe

2 使用命令转换为 py
C:\Python\Python38-32\Scripts\pyuic5.exe -x dialog.ui -o dialog.py

说明: -x 会产生 __main__ 函数。

3 实现查询和调用。

dialog.py

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'dialog.ui'
#
# Created by: PyQt5 UI code generator 5.15.9
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.


from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_Dialog(object):
    def setupUi(self, Dialog):
        Dialog.setObjectName("Dialog")
        Dialog.resize(675, 484)
        self.lineEdit = QtWidgets.QLineEdit(Dialog)
        self.lineEdit.setGeometry(QtCore.QRect(50, 50, 471, 20))
        self.lineEdit.setObjectName("lineEdit")
        self.textEdit = QtWidgets.QTextEdit(Dialog)
        self.textEdit.setGeometry(QtCore.QRect(40, 100, 601, 361))
        self.textEdit.setObjectName("textEdit")
        self.pushButton = QtWidgets.QPushButton(Dialog)
        self.pushButton.setGeometry(QtCore.QRect(550, 50, 75, 23))
        self.pushButton.setObjectName("pushButton")

        self.retranslateUi(Dialog)
        self.pushButton.clicked.connect(Dialog.searchIP) # type: ignore
        QtCore.QMetaObject.connectSlotsByName(Dialog)

    def retranslateUi(self, Dialog):
        _translate = QtCore.QCoreApplication.translate
        Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
        self.pushButton.setText(_translate("Dialog", "查询"))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    Dialog = QtWidgets.QDialog()
    ui = Ui_Dialog()
    ui.setupUi(Dialog)
    Dialog.show()
    sys.exit(app.exec_())

mydialog.py

# -*- coding: utf-8 -*-

import sys
import dialog
from PyQt5.QtWidgets import QApplication, QDialog
import requests


class MainDialog(QDialog):
    """
    def __init__(self):
        super().__init__()
        self.ui = dialog.Ui_Dialog()
        self.ui.setupUi(self)
    """

    def __init__(self, parent=None):
        super(MainDialog, self).__init__(parent)
        self.ui = dialog.Ui_Dialog()
        self.ui.setupUi(self)

    def searchIP(self):
        # 获取IP
        query = self.getIP()
        r = requests.get(f"http://ip-api.com/json/{query}")
        text = r.text
        self.ui.textEdit.setText(text)

    def getIP(self):
        ip = self.ui.lineEdit.text()
        return ip


if __name__ == '__main__':
    app = QApplication(sys.argv)
    myDlg = MainDialog()
    myDlg.show()
    sys.exit(app.exec_())

4 运行 mydialog.py 

参考:
https://github.com/zhiyiYo/PyQt-Fluent-Widgets/issues/786
https://www.cnblogs.com/lovesoo/p/12491361.html