python定义问题

Question

已经定义了变量，却提示未定义（本程序无主main）
此代码放在最前：

```python
def login():
    
    window = Tk()
    window.title("登录")

    l1 = ttk.Label(window,text="用户:")
    e1 = ttk.Entry(window)
    

    l2 = ttk.Label(window,text="密码:")
    e2 = ttk.Entry(window,show="*")
    

    b1 = ttk.Button(window,text="登录",command=logins)
    b2 = ttk.Button(window,text="退出",command=end)

    l1.grid(row=0,column=0,padx=15)
    e1.grid(row=0,column=1)

    l2.grid(row=1,column=0,padx=15)
    e2.grid(row=1,column=1)

    b1.grid(row=2,column=0)
    b2.grid(row=2,column=1) 
    window.mainloop()

```python
def logins():
    conn = mysql_conn()
    cur = conn.cursor()
    u_name=e1.get()
    u_pwd=e2.get()
    select_sql = f'select password from usertext where username = "{u_name}"'
    cur.execute(select_sql)
    res = cur.fetchone()
    if res is None:
            
        print('用户名错误，登录失败')
    else:
            
        m_pwd = res[0]
            
        if m_pwd == u_pwd:
            print('登录成功', u_name)
            win32api.MessageBox(0, "登录成功", "win激活",win32con.MB_OK)
        else:
            print('密码错误，登录失败')
        # 关闭连接
    cur.close()
    conn.close()

在另一变使用却提示未定义
NameError: name 'e1' is not defined

Answer 1

你是在login里面定义的e1，而你在logins中还在使用e1。当然不行喽