[英]python - pyqt5: error in show two form, name 'Window' is not defined
歡迎..
在主窗口中按退出按鈕后,就會出現此問題。 應該在何處再次返回登錄窗口。
form1(登錄窗口)代碼:
import sys
from PyQt5.QtWidgets import *
from form2 import *
class Window(QWidget):
right_uname = "admin"
right_pword = "password"
def __init__(self):
super().__init__()
self.init_ui()
def init_ui(self):
self.lbl_intro = QLabel('Welcome, please login')
self.lbl_enter_username = QLabel('Username:')
self.lbl_enter_password = QLabel('Password:')
self.txt_enter_username = QLineEdit()
self.txt_enter_password = QLineEdit()
self.cb_login = QCheckBox('Stay logged in?')
self.btn_login = QPushButton('Login')
self.grid = QGridLayout()
self.grid.setSpacing(5)
self.grid.addWidget(self.lbl_intro, 1, 1)
self.grid.addWidget(self.lbl_enter_username, 2, 0)
self.grid.addWidget(self.txt_enter_username, 2, 1)
self.grid.addWidget(self.lbl_enter_password, 3, 0)
self.grid.addWidget(self.txt_enter_password, 3, 1)
self.grid.addWidget(self.cb_login, 4, 1)
self.grid.addWidget(self.btn_login, 5, 1)
self.v_box = QVBoxLayout()
self.v_box.addStretch(0)
self.v_box.addLayout(self.grid)
self.v_box.addStretch(0)
self.h_box = QHBoxLayout()
self.h_box.addStretch(0)
self.h_box.addLayout(self.v_box)
self.h_box.addStretch(0)
self.setLayout(self.h_box)
self.btn_login.clicked.connect(lambda: self.btn_login_clk(self.txt_enter_username, self.txt_enter_password, self.cb_login.isChecked(), self.lbl_intro))
self.setWindowTitle('Login test')
self.show()
def btn_login_clk(self, username, password, cb, intro):
if username.text() == self.right_uname and password.text() == self.right_pword:
if cb:
intro.setText('Welcome,' + ' ' + self.right_uname + ' ' + 'cb ticked')
else:
self.mw = MainWindow()
self.hide()
self.mw.show()
else:
intro.setText('Wrong username or password')
self.clear_box()
def clear_box(self):
self.txt_enter_username.clear()
self.txt_enter_password.clear()
self.txt_enter_username.setFocus()
if __name__ == '__main__':
app = QApplication(sys.argv)
a_window = Window()
sys.exit(app.exec())
from2(MainWindow)代碼:
from form1 import *
class MainWindow(Window):
def __init__(self):
super().__init__()
self.init_ui()
def init_ui(self):
self.lbl_intro = QLabel('Main Window')
self.lbl_user_logged = QLabel('Welcome,' + ' ' + self.right_uname)
self.lbl_append = QLabel('Write something')
self.txt_write_box = QLineEdit()
self.btn_append = QPushButton('Append')
self.btn_logout = QPushButton('Logout')
layout = QVBoxLayout()
layout.addWidget(self.lbl_intro)
layout.addWidget(self.lbl_user_logged)
layout.addWidget(self.lbl_append)
layout.addWidget(self.txt_write_box)
layout.addWidget(self.btn_append)
layout.addWidget(self.btn_logout)
self.setLayout(layout)
self.setWindowTitle('Main')
self.btn_append.clicked.connect(self.append_clk)
self.btn_logout.clicked.connect(self.logout_action)
self.show()
def append_clk(self):
self.appendee = open('text.txt', 'a')
self.appendee.write('hry')
self.appendee.close()
def logout_action(self):
self.close()
a_window = Window(self)
a_window.show()
a_window.clear_box()
運行時:未定義名稱“窗口”
對我來說,這看起來像是某種循環導入問題,但我無法復制。 您正在使用哪個版本的Python?
無論如何,首先我會嘗試更改form1,以便在使用MainWindow之前就可以將導入本地化,以查看是否可以解決問題。 即from form2 import *
form1頂部的from form2 import *
行中刪除,並將btn_login_clk方法更改為此:
def btn_login_clk(self, username, password, cb, intro):
if username.text() == self.right_uname and password.text() == self.right_pword:
if cb:
intro.setText('Welcome,' + ' ' + self.right_uname + ' ' + 'cb ticked')
else:
from form2 import MainWindow # local import
self.mw = MainWindow()
self.hide()
self.mw.show()
else:
intro.setText('Wrong username or password')
self.clear_box()
在一個稍微不相關的主題上,我看到關閉MainWindow(即注銷)時,您將創建一個Window,其父級設置為您剛剛關閉的MainWindow。 這可能會導致新窗口甚至在它出現之前就被殺死(在我的情況下,什么也沒有出現,並且python以代碼1退出),因此應該刪除self
參數:
def logout_action(self):
self.close()
a_window = Window() # no 'self' argument
a_window.show()
a_window.clear_box()
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