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大家好，为什么这段代码在第 44 行返回错误，因为我认为是正确的 o_O
import tkinter as tk from tkinter import ttk import socket import threading def cell_selected(event): selected_item = tree.selection()[0] item_values = tree.item(selected_item, 'values') print("Selected item:", item_values) def connect_action(): threading.Thread(target=receive_data).start() def exit_program(): root.quit() def receive_data(): host = "127.0.0.1" port = 23456 with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s: s.bind((host, port)) s.listen() print(f"In ascolto su {host}:{port}") try: conn, addr = s.accept() with conn: print(f"Connesso da {addr}") while True: data = conn.recv(1024) if not data: break data_str = data.decode("utf-8") data_list = data_str.split(",") root.event_generate("<<DataReceived>>", data=data_list) except socket.error as e: print("Errore nella connessione:", e) def update_table(event): data_list = event.data if data_list: tree.item(tree.get_children()[1], values=data_list) root = tk.Tk() root.title("Spreadsheet App") # Creazione del widget Notebook (schede) notebook = ttk.Notebook(root) notebook.pack(fill="both", expand=True) # Primo tab con il primo Treeview tab1 = ttk.Frame(notebook) notebook.add(tab1, text="Terminal") columns = ("Order","TimeOp","Type","Size","Symbol","Price","S/L","T/P", "Price","Com.","Swap","Profit","Comment","Close") tree = ttk.Treeview(tab1, columns=columns, show="headings") for col in columns: tree.heading(col, text=col) tree.bind("<ButtonRelease-1>", cell_selected) tree.pack(padx=10, pady=10) # Pulsante "Connetti" a destra connect_button = tk.Button(root, text="Connetti", command=connect_action) connect_button.pack(side="right", padx=10, pady=5) # Secondo tab con il secondo Treeview tab2 = ttk.Frame(notebook) notebook.add(tab2, text="Storico") tree2 = ttk.Treeview(tab2, columns=("Symbol","Price","S/L"), show="headings") # ... Aggiungi colonne e dati al secondo Treeview ... tree2.bind("<ButtonRelease-1>", cell_selected) tree2.pack(padx=10, pady=10) exit_button = tk.Button(root, text="Esci", command=exit_program) exit_button.pack(side="right", pady=5) class CustomEvent: def __init__(self, widget, data): self.widget = widget self.data = data def generate_custom_event(widget, data): event = CustomEvent(widget, data) widget.event_generate("<<DataReceived>>", when="tail", data=event) root.bind("<<DataReceived>>", update_table) # Bind custom event root.mainloop()
第 44 行是
data_list = event.data
错误转储：
In ascolto su 127.0.0.1:23456 Connesso da ('127.0.0.1', 64976) Exception in Tkinter callback Traceback (most recent call last): File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.11_3.11.1264.0_x64__qbz5n2kfra8p0\Lib\tkinter\__init__.py", line 1948, in __call__ return self.func(*args) ^^^^^^^^^^^^^^^^ File "C:\Users\pct\Desktop\python\tabella.py", line 44, in update_table data_list = event.data ^^^^^^^^^^
我尝试过的：
目前没什么特别的
解决方案4
我怀疑问题出在 receive_data 功能。 当它生成 <<DataReceived>> event 事件数据可能为“None”。 你需要检查一下 data_list 在将其传递给事件处理程序之前包含一些实际数据。
[edit]
运行进一步测试，似乎自定义事件不包含 data 属性。 看 tkinter — Tcl/Tk 的 Python 接口 — Python 3.11.4 文档[^] 了解详情。
但 tkinter 文档有点稀疏。
[/edit]
解决方案5
您的错误与您访问自定义事件对象的数据的方式有关。 在您的代码中，您创建了一个名为“CustomEvent”的自定义事件类来处理自定义数据，但您尝试直接访问事件对象的数据属性，这导致了错误。
您需要修改生成自定义事件的方式 –
Python
def generate_custom_event(widget, data): event = CustomEvent(widget, data) widget.event_generate("<<DataReceived>>", when="tail", data=event)
您需要修改“receive_data”函数以使用“generate_custom_event”函数将接收到的数据作为自定义事件发送 –
Python
def receive_data(): host = "127.0.0.1" port = 23456 with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s: s.bind((host, port)) s.listen() print(f"In ascolto su {host}:{port}") try: conn, addr = s.accept() with conn: print(f"Connesso da {addr}") while True: data = conn.recv(1024) if not data: break data_str = data.decode("utf-8") data_list = data_str.split(",") #Send the received data as a custom event generate_custom_event(root, data_list) except socket.error as e: print("Errore nella connessione:", e)
在“update_table”函数中，您需要访问自定义事件对象的数据属性 –
Python
def update_table(event): custom_event = event.data #Access your custom event object data_list = custom_event.data if data_list: tree.item(tree.get_children()[1], values=data_list)
[EDIT]
如果注释中显示以下错误，则意味着您正在尝试在“Tkinter”应用程序中处理线程。 “Tkinter”不是线程安全的，这意味着您无法直接从非主线程更新 GUI。 您需要确保 GUI 更新是从主线程执行的。 您需要使用“root.after()”方法来安排主线程中的更新。 您可以通过以下方式了解更多信息—— 如何使用 Tkinter after() 方法安排操作[^]
Python
#All your previous code... #Function to handle received data inside the the main thread def handle_received_data(data_list): if data_list: tree.item(tree.get_children()[1], values=data_list) #I have modified receive_data function here... def receive_data(): host = "127.0.0.1" port = 23456 with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s: s.bind((host, port)) s.listen() print(f"In ascolto su {host}:{port}") try: conn, addr = s.accept() with conn: print(f"Connesso da {addr}") while True: data = conn.recv(1024) if not data: break data_str = data.decode("utf-8") data_list = data_str.split(",") #Schedule GUI update in the main thread here... root.after(0, handle_received_data, data_list) except socket.error as e: print("Errore nella connessione:", e) #The rest of your code...
解决方案6
注释中显示了下面的错误，这意味着您正在尝试在“Tkinter”应用程序中处理线程。
https://projectfreetv.onl/ https://waplus.win/
解决方案1
由于已经过去 5 个多小时了，而您仍然没有告诉我们您收到的错误消息是什么，我们能做的就是为您提供通用语法错误消息帮助： 如何编写代码来解决问题，初学者指南第 2 部分：语法错误[^]
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