我如何为小部件动态填充和删除字典？答案

【问题标题】：How i fill and remove dynamically dict for widget?我如何为小部件动态填充和删除字典？
【发布时间】：2013-09-14 05:18:24
【问题描述】：

我有以下代码：

#####   Slots for checkboxes (enable/disabling)
QtCore.QObject.connect(self.checkBox_3, QtCore.SIGNAL(_fromUtf8("stateChanged(int)")), self.checkBox_3.setOn)
QtCore.QObject.connect(self.checkBox_3, QtCore.SIGNAL(_fromUtf8("stateChanged(int)")), self.dateEdit.setEnabled)
QtCore.QObject.connect(self.checkBox_3, QtCore.SIGNAL(_fromUtf8("stateChanged(int)")), self.dateEdit_2.setEnabled)
QtCore.QObject.connect(self.checkBox, QtCore.SIGNAL(_fromUtf8("stateChanged(int)")), self.lineEdit.setEnabled)
QtCore.QObject.connect(self.checkBox_2, QtCore.SIGNAL(_fromUtf8("stateChanged(int)")), self.lineEdit_2.setEnabled)
QtCore.QObject.connect(self.checkBox_4, QtCore.SIGNAL(_fromUtf8("stateChanged(int)")), self.lineEdit_3.setEnabled)
#####

##### Slots for checkboxes/lineEdits (filling dict for database fields and values)
QtCore.QObject.connect(self.checkBox, QtCore.SIGNAL(_fromUtf8("stateChanged(int)")), lambda: self.interfaceCodesConstructor.setFilterDict(self,"name",self.lineEdit.text()))
QtCore.QObject.connect(self.checkBox_2, QtCore.SIGNAL(_fromUtf8("stateChanged(int)")), lambda: self.interfaceCodesConstructor.setFilterDict(self,"bought_price",persianToInteger(unicode(self.lineEdit_2.text()))))
QtCore.QObject.connect(self.checkBox_3, QtCore.SIGNAL(_fromUtf8("stateChanged(int)")), lambda: self.interfaceCodesConstructor.setFilterDict(self,"bought_date",self.dateEdit.text())) ##date        
QtCore.QObject.connect(self.checkBox_4, QtCore.SIGNAL(_fromUtf8("stateChanged(int)")), lambda: self.interfaceCodesConstructor.setFilterDict(self,"stock",persianToInteger(unicode(self.lineEdit_3.text()))))        


QtCore.QObject.connect(self.lineEdit, QtCore.SIGNAL(_fromUtf8("editingFinished()")), lambda: self.interfaceCodesConstructor.responseToRequestForData(self))
QtCore.QObject.connect(self.lineEdit_2, QtCore.SIGNAL(_fromUtf8("editingFinished()")), lambda: self.interfaceCodesConstructor.responseToRequestForData(self))
QtCore.QObject.connect(self.dateEdit, QtCore.SIGNAL(_fromUtf8("editingFinished()")), lambda: self.interfaceCodesConstructor.responseToRequestForData(self))         
QtCore.QObject.connect(self.lineEdit_3, QtCore.SIGNAL(_fromUtf8("editingFinished()")), lambda: self.interfaceCodesConstructor.responseToRequestForData(self))        



#### pressing seach key and start search action
QtCore.QObject.connect(self.lineEdit, QtCore.SIGNAL(_fromUtf8("returnPressed()")), lambda: self.interfaceCodesConstructor.responseToRequestForData(self))
QtCore.QObject.connect(self.pushButtonSearch, QtCore.SIGNAL(_fromUtf8("clicked()")), lambda: self.interfaceCodesConstructor.responseToRequestForData(self))
#######



##    enable/disabling "price date" checkbox
QtCore.QObject.connect(self.checkBox_3, QtCore.SIGNAL(_fromUtf8("toggled(bool)")), self.dateEdit.setEnabled)
QtCore.QObject.connect(self.checkBox_3, QtCore.SIGNAL(_fromUtf8("toggled(bool)")), self.dateEdit_2.setEnabled)

然后我在另一个文件中有以下SLOT：

def setFilterDict(self,obj,field,lineEditContent):
    self.objectSearchMaterials = obj

    if field not in self.filterNameDict.keys():# and self.filterNameDict.values() is not None:
        self.filterNameDict.update({field:lineEditContent})
    else:
        del self.filterNameDict[field]

我的问题是，当我点击 checkboxes 时，我会在一个字典中填写一个文本：self.filterNameDict，但是当我多次点击时，它无法处理给定的dict.我如何创建一个动态字典来处理每个checkboxes？这意味着我需要在单击 checkbox 时添加字段名称和 lineEdit text() 到 dict 并且当我删除它时，自动从 dict 中删除？

【问题讨论】：

标签： python qt signals-slots qlineedit qcheckbox

【解决方案1】：

您需要使用self.filterNameDict.pop(field, None) 而不是del self.filterNameDict[field]。

帮助：

>>> help(dict.pop)
Help on method_descriptor:

pop(...)
    D.pop(k[,d]) -> v, remove specified key and return the corresponding value.
    If key is not found, d is returned if given, otherwise KeyError is raised

【讨论】：