我正在python中尝试使用Tkinter和MySQL，但遇到了无法解决的问题。我所有的Tkinter代码都封装在类中，并且我有一个函数，该函数将关闭并在MySQL表中插入新行。我想要的是一旦此操作完成或遇到错误，标签上就会显示一条消息。
这是调用函数的按钮，它在一个名为“ LandingPage”的类中：
Page Header
Group Header#1
Group Header#1a
Group Header#1b
Group Header#2
Group Header#3
Group Header#4
Group Footer#4
Group Footer#3
Group Footer#2
Group Footer#1
Group Footer #1a
Group Footer #1b --> this section contain subreport
Group Footer #1c
这是它调用的代码：
# Button to take all the user input in the entry boxes and send it to
# the addClientToDB() function that will insert them into the database.
btnAddClient = ttk.Button(addClient, text="Add Client",
command=lambda:addClientToDB(self, tbContactName.get(), tbEmailAddr.get(), tbClientCompany.get()))
# Adding the button to the grid at 3, 1, and having it span 2 columns.
# Giving it 15px padding in x and 5px in y
btnAddClient.grid(row=3, column=1, columnspan=2, padx=15, pady=5)
很显然，您可以在该代码中看到我正在尝试使用.config（）方法设置标签“ lblErrorCode”，但是当我运行该代码时，什么也没有发生。数据已插入，但标签没有任何反应。但是我确实将输出输出到终端。因此，作为测试，我有意尝试输入一个太长的字符串，这会在终端上产生此结果，但对Label却没有任何作用：
# Function for adding clients to the database. It needs the name of the person,
# the email address and the company to be parsed to it
def addClientToDB(self, name, emailAddr, company):
# Creating the Connection string for the INSERT INTO statement, and adding
# the values to the end of the statement
cnxString = "INSERT INTO clientDetails(contactName, emailAddr, clientCompany)" \
"VALUES(%s, %s, %s)"
# Adding the arguments to a list that will also be sent
args = (name, emailAddr, company)
# Sending the string and the arguments off to the sendSqlQuery(), and
# putting anything that was returned into the "ans" variable
ans = sendSqlQuery(cnxString, args)
lblErrorCode.config(text=ans)
# Printing anything that was returned to the console for debugging purposes
print(ans)
关于如何获取更新标签功能的想法吗？
提前谢谢吗？