Tkinter中如何实现按Enter键在不同Entry输入框间跳转光标

开发基于Tkinter的多输入项记账软件时，鼠标逐一点击切换输入框操作效率低，需求为：在客户名称输入框按下Enter回车键后，光标自动跳转至客户手机号输入框。现有代码无法实现该效果，原代码如下：

from Tkinter import*

root = Tk()
root.geometry('1350x700+0+0')
root.resizable(width=False,height=False)
root.title('Billing App')

def jump_cursor(event):
    customer_PhoneNo_entry.icursor(0)

customer_detail_frame=Frame(root,bd=10,highlightbackground="blue", highlightthickness=2)
customer_detail_frame.place(x=0,y=10,width=1350,height=100)

customer_detail_lbl=Label(customer_detail_frame,text="customer detail",font=('verdana',10,'bold'))
customer_detail_lbl.grid(row=0,column=0,pady=10,padx=20)

customer_name_lbl=Label(customer_detail_frame,text="customer name",font=('verdana',10,'bold'))
customer_name_lbl.grid(row=1,column=0,pady=10,padx=20)

customer_name_entry=Entry(customer_detail_frame,width=20,textvariable = Customer_Name)
customer_name_entry.grid(row=1,column=1,pady=10,padx=20)

customer_phoneno_lbl=Label(customer_detail_frame,text="phone no.",font=('verdana',10,'bold'))
customer_phoneno_lbl.grid(row=1,column=2,pady=10,padx=20)

customer_PhoneNo_entry=Entry(customer_detail_frame,width=20,textvariable = Customer_Ph_No)
customer_PhoneNo_entry.grid(row=1,column=3,pady=10,padx=20)
customer_PhoneNo_entry.bind("<Return>",jump_cursor)

• 事件绑定对象错误：原代码将<Return>回车事件绑定在了手机号输入框上，只有光标在手机号输入框时按回车才会触发函数，完全不符合“在名称输入框按回车跳去手机号框”的触发逻辑
• 跳转逻辑缺失：icursor(0)仅能设置输入框内部的光标插入位置，无法将输入焦点切换到目标控件，自然无法实现跳转
• 变量未定义：代码中使用的Customer_Name、Customer_Ph_No两个Tkinter变量未提前初始化，运行时会直接抛出名称错误
• 缺少主循环调用：原代码未写root.mainloop()，窗口无法正常持续运行

1. 提前初始化两个输入框绑定的StringVar变量
2. 将<Return>回车事件绑定到客户名称输入框customer_name_entry上
3. 修改跳转函数逻辑：先调用目标输入框的focus_set()方法抢夺输入焦点，再用icursor(0)将光标定位到目标输入框内容起始位置
4. 补充Tkinter窗口主循环调用

修复后的可运行代码：

from Tkinter import *

root = Tk()
root.geometry('1350x700+0+0')
root.resizable(width=False, height=False)
root.title('Billing App')

# 提前初始化输入框绑定的文本变量
Customer_Name = StringVar()
Customer_Ph_No = StringVar()

def jump_cursor(event):
    # 先将输入焦点切换到手机号输入框
    customer_PhoneNo_entry.focus_set()
    # 再将光标定位到手机号输入框的起始位置
    customer_PhoneNo_entry.icursor(0)

customer_detail_frame = Frame(root, bd=10, highlightbackground="blue", highlightthickness=2)
customer_detail_frame.place(x=0, y=10, width=1350, height=100)

customer_detail_lbl = Label(customer_detail_frame, text="customer detail", font=('verdana', 10, 'bold'))
customer_detail_lbl.grid(row=0, column=0, pady=10, padx=20)

customer_name_lbl = Label(customer_detail_frame, text="customer name", font=('verdana', 10, 'bold'))
customer_name_lbl.grid(row=1, column=0, pady=10, padx=20)

customer_name_entry = Entry(customer_detail_frame, width=20, textvariable=Customer_Name)
customer_name_entry.grid(row=1, column=1, pady=10, padx=20)
# 把回车事件绑定到客户名称输入框，而非手机号输入框
customer_name_entry.bind("<Return>", jump_cursor)

customer_phoneno_lbl = Label(customer_detail_frame, text="phone no.", font=('verdana', 10, 'bold'))
customer_phoneno_lbl.grid(row=1, column=2, pady=10, padx=20)

customer_PhoneNo_entry = Entry(customer_detail_frame, width=20, textvariable=Customer_Ph_No)
customer_PhoneNo_entry.grid(row=1, column=3, pady=10, padx=20)

# 启动窗口主循环
root.mainloop()

补充：如果后续需要链式跳转（比如手机号框按回车跳转到下一个输入项），只需要给手机号输入框也绑定对应跳转事件，在事件函数里把焦点切到下一个目标控件即可。

内容的提问来源于stack exchange，提问作者Ricky