pyqt 两个窗口传值问题

[amgod]

背景描述:
A窗口中存在一个IP输入框lineEdit,一个提交按钮pushbutton，点击提交按钮则打开B窗口，并传递输入的ip_add地址字符串给B窗口。
B窗口代码中包含登陆数据库语句。

预期目标：
接收A窗口提交过来的ip_add变量，进行登陆数据库，打印登陆是否成功的提示。

存在问题：
目前是点击提交按钮，可以成功打开B窗口,但不知道怎么将变量值(ip_add)传递给第二个窗口。
本人是新手，请大家帮忙看看，有什么办法进行处理？

附:
A窗口基本处理语句：

# A.py
# -*- coding: utf-8 -*-
 
import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from Ui_1 import Ui_Form
import B
class Form(QWidget, Ui_Form):
    def __init__(self, parent=None):
        super(Form, self).__init__(parent)
        self.setupUi(self)
    def on_pushButton_clicked(self):
        global ip_add
        self.w2=B.Dialog()
        ip_add=self.lineEdit.text()
        self.w2.show()
if __name__ == "__main__":
    app = QApplication(sys.argv)
    myapp = Form()
    myapp.show()
    sys.exit(app.exec_())

B窗口基本处理语句:

# B.py
# -*- coding: utf-8 -*-
 
import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from Ui_2 import Ui_Dialog
import A
 
class Dialog(QDialog, Ui_Dialog):
    def __init__(self, parent=None):
        super(Dialog, self).__init__(parent)
        self.setupUi(self)
        conn = pymssql.connect(host=host_ip, database='db_name', user='db_user', password='db_pw')
        .........#其他处理部分
     
if __name__ == "__main__":
    app = QApplication(sys.argv)
    myapp = Dialog()
    myapp.show()
    sys.exit(app.exec_())

[panghuhu250]

1. Dialog类加一个ip参数, 如果以后还要用到的话, 把它保存起来

# B.py
# -*- coding: utf-8 -*-
 
import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from Ui_2 import Ui_Dialog
 
class Dialog(QDialog, Ui_Dialog):
    def __init__(self, ip, parent=None):
        super(Dialog, self).__init__(parent)
        self.setupUi(self)
        self.ip_address = ip #如果以后用不到ip, 这一句也不需要
        conn = pymssql.connect(host=ip, database='db_name', user='db_user', password='db_pw')
        .........#其他处理部分
...

2. 创建w2时, 传递ip的值

# A.py
# -*- coding: utf-8 -*-
 
import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from Ui_1 import Ui_Form
import B
class Form(QWidget, Ui_Form):
    def __init__(self, parent=None):
        super(Form, self).__init__(parent)
        self.setupUi(self)
    def on_pushButton_clicked(self):
        ip_add=self.lineEdit.text()
        self.w2=B.Dialog(ip_add)
        self.w2.show()
if __name__ == "__main__":
    app = QApplication(sys.argv)
    myapp = Form()
    myapp.show()
    sys.exit(app.exec_())

[weixin_44877223]

@amgod 这个方法确实不错，找了半天终于得到解答

[amgod]

引用 1 楼 panghuhu250的回复:

1. Dialog类加一个ip参数, 如果以后还要用到的话, 把它保存起来

# B.py
# -*- coding: utf-8 -*-
 
import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from Ui_2 import Ui_Dialog
 
class Dialog(QDialog, Ui_Dialog):
    def __init__(self, ip, parent=None):
        super(Dialog, self).__init__(parent)
        self.setupUi(self)
        self.ip_address = ip #如果以后用不到ip, 这一句也不需要
        conn = pymssql.connect(host=ip, database='db_name', user='db_user', password='db_pw')
        .........#其他处理部分
...

2. 创建w2时, 传递ip的值

# A.py
# -*- coding: utf-8 -*-
 
import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from Ui_1 import Ui_Form
import B
class Form(QWidget, Ui_Form):
    def __init__(self, parent=None):
        super(Form, self).__init__(parent)
        self.setupUi(self)
    def on_pushButton_clicked(self):
        ip_add=self.lineEdit.text()
        self.w2=B.Dialog(ip_add)
        self.w2.show()
if __name__ == "__main__":
    app = QApplication(sys.argv)
    myapp = Form()
    myapp.show()
    sys.exit(app.exec_())

按照你提的方法可成功传递，多谢。