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我有两个选项菜单,通过从另一个菜单中选择一个值来更新一个菜单的内容。虽然这是一种相当普遍的情况,但我似乎无法使其发挥作用。我现在有它,这样的选项更新,但在从第二,更新的盒子,它抛出下面的错误选择项目:OptionMenu在项目更新后无法工作
self.SelectFrame['menu'].add_command(label=frame, command=lambda v = self.varFrame, l=frame:v.set(1))
AttributeError: 'str' object has no attribute 'set'`
有问题的optionmenu声明中的代码如下:
self.varFrame = Tk.StringVar()
self.Frames = ["",""]
self.SelectFrame = Tk.OptionMenu(botLeftFrame, self.varFrame, *self.Frames)
self.varFrame.set("None selected")
self.SelectFrame.pack(side="left", padx = 5, pady = 10)
在同一类的另一种方法是这样的代码:
def runSelectionChanged(self,*args):
cnxn = pyodbc.connect('DRIVER={Microsoft Access Driver (*.mdb, *.accdb)};DBQ=C:\Users\Public\dbsDetectorBookingSystem.accdb')
cursor = cnxn.cursor()
cursor.execute("SELECT RunFilePath, RunID FROM tblRuns")
rows = cursor.fetchall()
for row in rows:
if row.RunFilePath == self.varRun.get():
chosenRunID = row.RunID
sqlString = "SELECT LocalFilePath, RunID FROM tblFrames WHERE RunID=?"
cursor.execute(sqlString, str(chosenRunID))
self.userFrames = cursor.fetchall()
self.Frames = ["",""]
for frame in self.userFrames:
self.Frames.append(frame.LocalFilePath)
newFrames = self.Frames
self.varFrame = ""
self.SelectFrame['menu'].delete(0, 'end')
for frame in newFrames:
self.SelectFrame['menu'].add_command(label=frame, command=lambda v = self.varFrame, l=frame:v.set(1))
,当你选择它已被更新后的菜单中的项目将引发错误,我不明白为什么我确信lambda命令赋予它设置的能力。如果没有使用lambda表达式这个命令,我尝试过其他各种方式,但它似乎不起作用。
谢谢,我没有发现 – JacobM