谢谢Oleh Prypin!当我在PySide文档中遇到晦涩难懂的arg__1时,你的答案对我有帮助。
当我同时测试combo.currentIndexChanged [str]和combo.currentIndexChanged [unicode]时,每个信号都发送当前索引文本的unicode版本。
下面是演示行为的一个例子:
from PySide import QtCore
from PySide import QtGui
class myDialog(QtGui.QWidget):
def __init__(self, *args, **kwargs):
super(myDialog, self).__init__(*args, **kwargs)
combo = QtGui.QComboBox()
combo.addItem('Dog', 'Dog')
combo.addItem('Cat', 'Cat')
layout = QtGui.QVBoxLayout()
layout.addWidget(combo)
self.setLayout(layout)
combo.currentIndexChanged[int].connect(self.intChanged)
combo.currentIndexChanged[str].connect(self.strChanged)
combo.currentIndexChanged[unicode].connect(self.unicodeChanged)
combo.setCurrentIndex(1)
def intChanged(self, index):
print "Combo Index: "
print index
print type(index)
def strChanged(self, value):
print "Combo String:"
print type(value)
print value
def unicodeChanged(self, value):
print "Combo Unicode String:"
print type(value)
print value
if __name__ == "__main__":
app = QtGui.QApplication([])
dialog = myDialog()
dialog.show()
app.exec_()
输出的结果是:
Combo Index
1
<type 'int'>
Combo String
<type 'unicode'>
Cat
Combo Unicode String
<type 'unicode'>
Cat
我也证实,即basestring将抛出一个错误IndexError: Signature currentIndexChanged(PyObject) not found for signal: currentIndexChanged
。 PySide出现分化int
,float
(它指的是作为double
),str
/unicode
(两者成为unicode
),和bool
,但所有其他Python类型被解析为PyObject
对于信号特征的目的。
希望能帮助别人!