Python设计与实现一款简单的手机银行系统。具体功能： （1）登录功能，使用学号和密码登录，密码连续输错三次则账号冻结； （2）具有账户查询功能：登记账户各项信息，包括：姓名、余额，近一个月的支出和收入，账户挂失； （3）具有存款功能：可按不同货币存款，例如人民币、美元、欧元等； （4）具有取款功能：可快速取1000、2000、3000和其他金额等； （5）具有转账汇款功能：银行账号转账、手机号转账，转账记录，转账限额设置等； （6）具有投资理财功能，如基金投资、购买理财产品、购买个人养老金；

好的，我会给出一个简单的Python代码示例来实现这个手机银行系统。以下是代码：

import sqlite3
from tkinter import *

# 创建数据库连接
conn = sqlite3.connect('bank.db')
cursor = conn.cursor()

# 创建用户信息表
cursor.execute('''
CREATE TABLE IF NOT EXISTS user_info (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    student_id TEXT NOT NULL UNIQUE,
    password TEXT NOT NULL,
    name TEXT,
    balance REAL,
    last_month_income REAL,
    last_month_expense REAL,
    is_lost INTEGER
)
''')
conn.commit()

# 创建存款记录表
cursor.execute('''
CREATE TABLE IF NOT EXISTS deposit_record (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    student_id TEXT NOT NULL,
    currency TEXT NOT NULL,
    amount REAL NOT NULL,
    time TEXT NOT NULL
)
''')
conn.commit()

# 创建取款记录表
cursor.execute('''
CREATE TABLE IF NOT EXISTS withdraw_record (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    student_id TEXT NOT NULL,
    amount REAL NOT NULL,
    time TEXT NOT NULL
)
''')
conn.commit()

# 创建转账记录表
cursor.execute('''
CREATE TABLE IF NOT EXISTS transfer_record (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    student_id TEXT NOT NULL,
    to_account TEXT NOT NULL,
    amount REAL NOT NULL,
    time TEXT NOT NULL
)
''')
conn.commit()

# 创建投资记录表
cursor.execute('''
CREATE TABLE IF NOT EXISTS investment_record (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    student_id TEXT NOT NULL,
    investment_type TEXT NOT NULL,
    amount REAL NOT NULL,
    time TEXT NOT NULL
)
''')
conn.commit()

# 登录界面
def login():
    global user_id_entry, password_entry, login_window
    # 验证学号和密码是否正确
    cursor.execute('SELECT * FROM user_info WHERE student_id = ? AND password = ?', (user_id_entry.get(), password_entry.get()))
    user_info = cursor.fetchone()
    if user_info:
        # 登录成功，跳转到主界面
        login_window.destroy()
        main_page(user_info)
    else:
        # 登录失败，弹出提示框
        messagebox.showerror('错误', '学号或密码错误')

    # 密码输入框清空
    password_entry.delete(0, END)

    # 密码输入框获取焦点
    password_entry.focus()

    # 更新密码错误次数
    global password_errors
    password_errors += 1
    if password_errors >= 3:
        # 密码错误次数达到3次，冻结账户
        cursor.execute('UPDATE user_info SET is_lost = 1 WHERE student_id = ?', (user_id_entry.get(),))
        conn.commit()
        messagebox.showerror('错误', '密码错误次数达到3次，账户已冻结')
        password_errors = 0

# 主界面
def main_page(user_info):
    # 创建主界面
    global main_window, balance_label, income_label, expense_label
    main_window = Tk()
    main_window.title('手机银行系统 - 主页')

    # 显示用户信息
    name_label = Label(main_window, text='姓名：' + user_info[3])
    name_label.pack()
    balance_label = Label(main_window, text='余额：' + str(user_info[4]))
    balance_label.pack()
    income_label = Label(main_window, text='近一个月收入：' + str(user_info[5]))
    income_label.pack()
    expense_label = Label(main_window, text='近一个月支出：' + str(user_info[6]))
    expense_label.pack()

    # 创建操作按钮
    deposit_button = Button(main_window, text='存款', command=deposit_window)
    deposit_button.pack(pady=10)
    withdraw_button = Button(main_window, text='取款', command=withdraw_window)
    withdraw_button.pack(pady=10)
    transfer_button = Button(main_window, text='转账', command=transfer_window)
    transfer_button.pack(pady=10)
    investment_button = Button(main_window, text='投资理财', command=investment_window)
    investment_button.pack(pady=10)

    main_window.mainloop()

# 存款窗口
def deposit_window():
    global deposit_currency_entry, deposit_amount_entry, deposit_window
    deposit_window = Toplevel()
    deposit_window.title('存款窗口')

    # 货币选择
    deposit_currency_label = Label(deposit_window, text='货币')
    deposit_currency_label.grid(row=0, column=0)
    deposit_currency_entry = Entry(deposit_window)
    deposit_currency_entry.grid(row=0, column=1)

    # 存款金额
    deposit_amount_label = Label(deposit_window, text='存款金额')
    deposit_amount_label.grid(row=1, column=0)
    deposit_amount_entry = Entry(deposit_window)
    deposit_amount_entry.grid(row=1, column=1)

    # 存款按钮
    deposit_button = Button(deposit_window, text='存款', command=deposit)
    deposit_button.grid(row=2, column=0, columnspan=2, pady=10)

    deposit_window.mainloop()

# 存款操作
def deposit():
    # 检查货币和金额是否填写
    if deposit_currency_entry.get() == '' or deposit_amount_entry.get() == '':
        messagebox.showerror('错误', '请输入货币和金额')
        return

    # 更新余额
    cursor.execute('UPDATE user_info SET balance = balance + ? WHERE student_id = ?', (float(deposit_amount_entry.get()), user_id_entry.get()))
    conn.commit()

    # 记录存款
    cursor.execute('INSERT INTO deposit_record (student_id, currency, amount, time) VALUES (?, ?, ?, datetime("now", "localtime"))', (user_id_entry.get(), deposit_currency_entry.get(), float(deposit_amount_entry.get())))
    conn.commit()

    # 更新主界面显示
    update_main_page()

    # 关闭存款窗口
    deposit_window.destroy()

# 取款窗口
def withdraw_window():
    global withdraw_amount_entry, withdraw_window
    withdraw_window = Toplevel()
    withdraw_window.title('取款窗口')

    # 取款金额
    withdraw_amount_label = Label(withdraw_window, text='取款金额')
    withdraw_amount_label.grid(row=0, column=0)
    withdraw_amount_entry = Entry(withdraw_window)
    withdraw_amount_entry.grid(row=0, column=1)

    # 取款按钮
    withdraw_button = Button(withdraw_window, text='取款', command=withdraw)
    withdraw_button.grid(row=1, column=0, columnspan=2, pady=10)

    withdraw_window.mainloop()

# 取款操作
def withdraw():
    # 检查金额是否填写
    if withdraw_amount_entry.get() == '':
        messagebox.showerror('错误', '请输入金额')
        return

    # 检查余额是否充足
    cursor.execute('SELECT * FROM user_info WHERE student_id = ?', (user_id_entry.get(),))
    user_info = cursor.fetchone()
    if float(withdraw_amount_entry.get()) > user_info[4]:
        messagebox.showerror('错误', '余额不足')
        return

    # 更新余额
    cursor.execute('UPDATE user_info SET balance = balance - ? WHERE student_id = ?', (float(withdraw_amount_entry.get()), user_id_entry.get()))
    conn.commit()

    # 记录取款
    cursor.execute('INSERT INTO withdraw_record (student_id, amount, time) VALUES (?, ?, datetime("now", "localtime"))', (user_id_entry.get(), float(withdraw_amount_entry.get())))
    conn.commit()

    # 更新主界面显示
    update_main_page()

    # 关闭取款窗口
    withdraw_window.destroy()

# 转账窗口
def transfer_window():
    global to_account_entry, transfer_amount_entry, transfer_window
    transfer_window = Toplevel()
    transfer_window.title('转账窗口')

    # 对方账户
    to_account_label = Label(transfer_window, text='对方账户')
    to_account_label.grid(row=0, column=0)
    to_account_entry = Entry(transfer_window)
    to_account_entry.grid(row=0, column=1)

    # 转账金额
    transfer_amount_label = Label(transfer_window, text='转账金额')
    transfer_amount_label.grid(row=1, column=0)
    transfer_amount_entry = Entry(transfer_window)
    transfer_amount_entry.grid(row=1, column=1)

    # 转账按钮
    transfer_button = Button(transfer_window, text='转账', command=transfer)
    transfer_button.grid(row=2, column=0, columnspan=2, pady=10)

    transfer_window.mainloop()

# 转账操作
def transfer():
    # 检查对方账户和金额是否填写
    if to_account_entry.get() == '' or transfer_amount_entry.get() == '':
        messagebox.showerror('错误', '请输入对方账户和金额')
        return

    # 检查余额是否充足
    cursor.execute('SELECT * FROM user_info WHERE student_id = ?', (user_id_entry.get(),))
    user_info = cursor.fetchone()
    if float(transfer_amount_entry.get()) > user_info[4]:
        messagebox.showerror('错误', '余额不足')
        return

    # 更新余额
    cursor.execute('UPDATE user_info SET balance = balance - ? WHERE student_id = ?', (float(transfer_amount_entry.get()), user_id_entry.get()))
    conn.commit()

    # 记录转账
    cursor.execute('INSERT INTO transfer_record (student_id, to_account, amount, time) VALUES (?, ?, ?, datetime("now", "localtime"))', (user_id_entry.get(), to_account_entry.get(), float(transfer_amount_entry.get())))
    conn.commit()

    # 更新主界面显示
    update_main_page()

    # 关闭转账窗口
    transfer_window.destroy()

# 投资理财窗口
def investment_window():
    global investment_type_entry