import json

json_str =' [ "Alice", "girl",17,"New York"]'

data = json.loads(json_str)
print(data)

import sqlite3
conn = sqlite3. ___________('example.db')
cursor = conn.cursor()
cursor.execute('CREATE TABLE IF NOT EXISTS users (id INTEGER PRIMARY KEY, name TEXT, age INTEGER)')
conn.commit()
conn.close()

import tkinter as tk
root = tk.Tk()
my_var = tk.StringVar()
my_var.set("Hello")
label = tk.Label(root, textvariable=my_var)
label.pack()
root.mainloop()

class A():  

     def __init__(self,value):  

         self.value=value*value  

b=A(3)  

print(b.value) 

 （含图）

with open("test.txt","r") as f:

       print(f.read())

with open("test.txt", "r") as f: 

    f.write("测试写入")

（含图）

import numpy as np

a=np.loadtxt('1.csv',delimiter=',')

print(a[1][2])

class A():  

     def b(self):  

         print('方法b')  

c=A()  

c.b() 

with open('1.txt') as f:
print(f.read(1))
f.seek(2)
print(f.read(1))

import tkinter as tk 

from tkinter import messagebox
root= tk.Tk()
root.title('演示窗口')
root.geometry("300x100+630+80")
btn1 = tk.Button(root)
btn1["text"]= "点击"
btn1.pack()
def call(event):
       messagebox.showinfo('窗口名称','点击成功')
btn1.bind('<Button-1>',call)

执行下面代码，说法正确的是？（ ）