Question

当我尝试使用用户mysql连接到"root"时，我的应用程序返回"Access denied for user *"ODBC"@"localhost" (using password:NO)"*。我知道为什么会这样。

我使用Tkinter之类的GUI，我只测试了Connection的脚本，它的确如此。

代码连接

import MySQLdb

class Conexao():
    def __init__(self, host,user,passwd,db):
        self.host = host
        self.user = user
        self.passwd = passwd
        self.db = db

    def getconnection(self):
        try:
            self.conn = MySQLdb.connect(host=self.host,
                                        user = self.user,
                                        passwd = self.passwd,
                                        db = self.db)
            print "Connected"
            return self.conn.cursor()
        except MySQLdb.Error,e:
            print " error "+ str(e[1])
            return e

代码应用

from Tkinter import *

import sys
sys.path.insert(0,'C:\\Users\\felipe.cunha\\Documents\\project')

from conexao.conexao import Conexao


"""
b.execute("select * from setor")
>>> b.fetchall()
"""
class View(Frame):
        def __init__(self,master = None):
                Frame.__init__(self)
                self.master.title("teste")
                self.create_menu()
        def create_menu(self):#,width = self.width,height = self.height):
                host = "localhost"
                label_menu = Label(self.master,text = 'Login')
                label_menu.pack()

                entrada_menu_login = Entry(self.master)# user
                entrada_menu_senha = Entry(self.master, show = "*")# passwd                

                conn = Conexao(host,entrada_menu_login.get(),entrada_menu_senha.get(),"dsti")
                #conn = Conexao(host,"root","d04m10","dsti")


                btn_login = Button(self.master,text="Logar",command = conn.getConnection)#self.show_entry_fields)

                entrada_menu_login.pack()
                entrada_menu_senha.pack()
                btn_login.pack()


        def show_entry_fields(self):
                print(self.entrada_menu_login.get(), self.entrada_menu_senha.get())





app = View()
app.mainloop()

Answer 1

问题是，在用户能够输入用户名或密码之前，在GUI启动时创建连接。在您创建连接时，entrada_menu_login和entrada_menu_senha都为空。

解决方案是在用户点击按钮之后才创建连接。

Answer 2

像Bryan说的那样，这可能是你的代码的问题，而不是让按钮直接调用conn.getConnection（），尝试一种方法，你将条目变量保存到'self'然后当调用按钮时，你在那时创建连接。

代码看起来像 -

class View(Frame):
        def __init__(self,master = None):
                Frame.__init__(self)
                self.master.title("teste")
                self.create_menu()
        def create_menu(self):#,width = self.width,height = self.height):
                host = "localhost"
                label_menu = Label(self.master,text = 'Login')
                label_menu.pack()

                self.entrada_menu_login = Entry(self.master)# user
                self.entrada_menu_senha = Entry(self.master, show = "*")# passwd


                btn_login = Button(self.master,text="Logar",command = self.buttonListener) #self.show_entry_fields

                entrada_menu_login.pack()
                entrada_menu_senha.pack()
                btn_login.pack()

        def buttonListener(self):
            conn = Conexao(host,self.entrada_menu_login.get(),self.entrada_menu_senha.get(),"dsti")                                
            #conn = Conexao(host,"root","d04m10","dsti")
            dbcursor = conn.getConnection()
            #Do the rest of the logic you want to do.

MySQLdb python的问题

2 个答案: