Python：在 Function2 中调用 Function1

Question

我想拆分这个函数的代码，推出代码（name_city = city.get() ... cursor.execute ...., and results）。我附上两个代码：第一个应用程序运行良好，而第二个我想获得但我不能。

def write():
    if categoria.get() == "test1" and sottocategoria.get() == "test2":
    
        name_city = city.get()
        cursor.execute('SELECT * FROM TableExample WHERE Name_city=?',(name_city,))
        results = cursor.fetchone()

        cursor.execute('SELECT Test1 FROM TableExample ORDER BY RANDOM() LIMIT 1')
        word2 = cursor.fetchone()

        inhabitants = results[2]
        surface = results[3]

        text.delete(1.0,END)
        text.insert(tk.END, f"{name_city} {''.join(word2)} {inhabitants} inhabitants on an area of {surface}")

现在如果我想从内部消除我们（name_city = city.get () ... cursor.execute .... and results），创建函数 def data_city，以便将其插入函数（def写），不是里面if，而是out，怎么办？我已经尝试过了，但它不起作用。问题是def data_city函数好像被忽略了怎么调用write函数里面的data_city函数？ （但在 If 之外，不在 If 之内）。谢谢

def data_city():
    name_city = city.get()
    cursor.execute('SELECT * FROM TableExample WHERE Name_city=?',(name_city,))
    results = cursor.fetchone()
    return results


def write():

    data_city() #ERROR/PROBLEM

    if categoria.get() == "test1" and sottocategoria.get() == "test2":
       
    cursor.execute('SELECT Test1 FROM TableExample ORDER BY RANDOM() LIMIT 1')
    word2 = cursor.fetchone()

    inhabitants = results[2]
    surface = results[3]

    text.delete(1.0,END)
    text.insert(tk.END, f"{name_city} {''.join(word2)} {inhabitants} inhabitants on an area of {surface}")

为了更加完整和清晰，我附上了完整的可启动代码

from tkinter import *
from tkinter import ttk
import tkinter as tk
import sqlite3

window=Tk()
window.title("aaaaa")
window.geometry("750x750")
window.configure(bg='#78c030')

con = sqlite3.connect('/home/mypc/Scrivania/aaaa/Database.db')
cursor = con.cursor()

### PULSANTI ###

def write():
    if categoria.get() == "test1" and sottocategoria.get() == "test 1.2":

        name_city = city.get()
        cursor.execute('SELECT * FROM TableExample WHERE Name_city=?',(name_city,))
        results = cursor.fetchone()

        cursor.execute('SELECT Test1 FROM TableExample2 ORDER BY RANDOM() LIMIT 1')
        word2 = cursor.fetchone()

        inhabitants = results[2]
        surface = results[3]

        text.delete(1.0,END)
        text.insert(tk.END, f"{name_city} {''.join(word2)} {inhabitants} inhabitants on an area of {surface}")
   

button2 = Button(window, text="Button2", bg='white', command = 
write)
button2.pack()
button2.place(x=5, y=330)

### TEXTBOX MULTILINE ###
text = Text(window,width=63,height=38)
text.pack()
text.place(x=180, y=24)

### CATEGORIA E SOTTO CATEGORIA ###
cat=StringVar()
sub_cat=StringVar()

def change_val(*args):
    if cat.get() == "test1":
        sottocategorias = ["test 1.1", "test 1.2", "test 1.3"]
        sottocategoria.config(values=sottocategorias)
    else:
        sottocategorias = ["aaaa"]
        sottocategoria.config(values=sottocategorias)
    
categorias=["test1", "test2", "test3"]
categoria=ttk.Combobox(window,value=categorias,
textvariable=cat,width=16)
categoria.place(x=5, y=25)
cat.set("Scegliere categoria")

sottocategorias=["aaaa"]
sottocategoria=ttk.Combobox(window,textvariable=sub_cat,
value=sottocategorias,width=16)
sottocategoria.place(x=5, y=55)

cat.trace("w",change_val) 

### COMBOBOX ###

### CAMPIONATO COMBOBOX ###
def combo_nation():
    cursor.execute('SELECT DISTINCT Nation FROM TableExample')
    result=[row[0] for row in cursor]
    return result

### SQUADRA COMBOBOX ###
def combo_city(event=None):
    val = nation.get()
    cursor.execute('SELECT Name_city FROM Info WHERE TableExample = ?', (val,))
    result = [row[0] for row in cursor]
    city['value'] = result
    city.current(0)
    return result

nation=ttk.Combobox(window,state="readonly")
nation['value'] = combo_campionati()
nation.bind('<<ComboboxSelected>>', combo_squadre)
nation.place(x=5, y=150,height = 25, width = 180)

city=ttk.Combobox(window,state="readonly")
city.place(x=5, y=180, height = 25, width = 180)

window.mainloop()

Answer 1

看起来您缺少 data_city 函数的返回值？试试：

def data_city():
    name_city = city.get()
    cursor.execute('SELECT * FROM Info_Squadra WHERE Name_city=?',(name_city,))
    results = cursor.fetchone()
    return results