我想要使用globar设置txt为全局变量,但是没有成功。为什么?
代码如下:
```python
import sys
import PySide2.QtWidgets
from ui_window import Ui_MainWindow
class W(PySide2.QtWidgets.QMainWindow):
def __init__(self):
super().__init__()
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.show()
self.ui.pb_zz.clicked.connect(self.xg)
self.ui.pb_bc.clicked.connect(self.bc)
def xg(self):
self.ui.lb_xg.setText("")
def bc(self):
global txt #问题在这里
txt = self.ui.le_rm.text()
print(txt)
if __name__ == "__main__":
app = PySide2.QtWidgets.QApplication(sys.argv)
window = W()
sys.exit(app.exec_())