kivy mysql,使用Kivy检索MySQL

I have a Kivy code, where the output is:

I want to get replace the Box No. with strings retrieved from MySQL

So far I have tried to implement the MySQL to the python script:

class RemoveScreen(MyLayout):

def __init__(self,kwargs):

db = MySQLdb.connect(“localhost”, “root”, “[PASSWORD]”, “tcs_microrage_crm”)

cursor=db.cursor()

self.var = StringVar()

self.label1 = Label(self, text=0, textvariable=self.var)

myvar=str(self.var)

#http://stackoverflow.com/questions//python-mysql-parameterized-queries

cursor.execute(“SELECT part_name FROM stock_lists WHERE part_number = %s”, (myvar))

self.myvar=StringVar()

self.myvar.set(cursor.fetchone())

self.label2 = Label(self, text=0, textvariable=myvar)

But this didn’t work.

Q: How can I do MySQL queries and print individual strings in the kv file.

解决方案

To show you how you could do that, I made a little search example.

This searches for fruit names in the database, and will output its name and price to the table.

from kivy.app import App

import MySQLdb

from kivy.uix.boxlayout import BoxLayout

from kivy.uix.gridlayout import GridLayout

from kivy.uix.label import Label

from kivy.uix.button import Button

from kivy.uix.textinput import TextInput

class DbCon:

def __init__(self):

self.db = MySQLdb.connect(user=”root”,passwd=”pw”,db=”kivy”)

self.c = self.db.cursor()

def get_rows(self,search = “”):

self.c.execute(“SELECT * FROM fruit WHERE name REGEXP ‘.*%s.*’ LIMIT 3” % search)

return self.c.fetchall()

class Table(BoxLayout):

def __init__(self,kwargs):

super(Table,self).__init__(kwargs)

self.orientation = “vertical”

self.search_field = BoxLayout(orientation=”horizontal”)

self.search_input = TextInput(text=’search’,multiline=False)

self.search_button = Button(text=”search”,on_press=self.search)

self.search_field.add_widget(self.search_input)

self.search_field.add_widget(self.search_button)

self.add_widget(self.search_field)

self.add_widget(Label(text=”table”))

self.table = GridLayout(cols=2,rows=4)

self.table.add_widget(Label(text=”Fruit”))

self.table.add_widget(Label(text=”Price”))

self.rows = [[Label(text=”item”),Label(text=”price”)],

[Label(text=”item”),Label(text=”price”)],

[Label(text=”item”),Label(text=”price”)]]

for item,price in self.rows:

self.table.add_widget(item)

self.table.add_widget(price)

self.add_widget(self.table)

self.db = DbCon()

self.update_table()

def update_table(self,search=””):

for index,row in enumerate(self.db.get_rows(search)):

self.rows[index][0].text = row[1]

self.rows[index][1].text = str(row[2])

def clear_table(self):

for index in range(3):

self.rows[index][0].text = “”

self.rows[index][1].text = “”

def search(self, *args):

self.clear_table()

self.update_table(self.search_input.text)

class MyApp(App):

def build(self):

return Table()

MyApp().run()