【发布时间】:2021-11-12 14:13:58
【问题描述】:
我正在使用 Tkinter 下载管理器 python gui 应用程序,到了一半,我的代码开始看起来很乱,所以我决定在不同的文件上分离函数,然后导入它: 我的主要代码:
from tkinter import *
from functions import add_download
root = Tk()
root.title("The Pownloader!")
canvas = Canvas(root, width=700, height=500).pack()
# Buttons:
ADD_BUTTON = Button(root, text="ADD", bd=4, height=2, width=5, command=add_download)
SETTINGS_BUTTON = Button(root, text="SETTINGS", bd=4, height=2, width=5)
ABOUT_BUTTON = Button(root, text="ABOUT", bd=4, height=2, width=5)
EXIT_BUTTON = Button(root, text="EXIT", bd=4, height=2, width=5, command=quit)
# Mini-Buttons:
PAUSE_MINI_BUTTON = Button(root, text="PAUSE", font=(None, "8"), height=2, width=3)
RESUME_MINI_BUTTON = Button(root, text="RESUME", font=(None, "8"), height=2, width=3)
REMOVE_MINI_BUTTON = Button(root, text="REMOVE", font=(None, "8"), height=2, width=3)
# Side_Mini_Buttons:
DOWNLOAD_WINDOW = Button(root, text="Downloads", font=(None, "8"), height=3, width=6)
ERRORS_WINDOW = Button(root, text="Failed", font=(None, "8"), height=3, width=6)
COMPLETED_WINDOW = Button(root, text="Completed", font=(None, "8"), height=3, width=6)
# Positionning Buttons:
ADD_BUTTON.place(x=70, y=20)
SETTINGS_BUTTON.place(x=145, y=20)
ABOUT_BUTTON.place(x=220, y=20)
EXIT_BUTTON.place(x=295, y=20)
PAUSE_MINI_BUTTON.place(x=290, y=455)
RESUME_MINI_BUTTON.place(x=340, y=455)
REMOVE_MINI_BUTTON.place(x=390, y=455)
DOWNLOAD_WINDOW.place(x=1, y=100)
ERRORS_WINDOW.place(x=1, y=160)
COMPLETED_WINDOW.place(x=1, y=220)
# Download Frame:
DOWNLOAD_LIST_LABEL = Label(root, text="Download List:")
DOWNLOAD_LIST_LABEL.place(x=70, y=80)
DOWNLOAD_ENTRIES = Listbox(root, width=70, height=19)
DOWNLOAD_ENTRIES.place(x=70, y=100)
# Main Loop:
root.mainloop()
但是我的 functions.py 代码看起来像这样:
def add_download():
# Defining The Pop-up frame:
top = Toplevel(root, width = 420, height = 150)
top.title("New Download")
# Putting on widgets:
link = StringVar()
LINK_LABEL = Label(top, text = "Paste Link:")
FIELD_ENTRY = Entry(top, width = 40, textvariable=link)
def on_click():
link_to_verify = (link.get()).strip()
if len(link_to_verify)>15:
if link_to_verify[0:11]=="http://www.":
DOWNLOAD_ENTRIES.insert(0, link_to_verify)
else:
print("Stupid")
else:
print("not a valid link")
BUTTONS_WIDGET = Frame(top)
ADD_BUTTON = Button(BUTTONS_WIDGET, text = "Add", width=10, command=on_click)
CANCEL_BUTTON = Button(BUTTONS_WIDGET, text = "Cancel", width=10, command=top.destroy)
# Positionning everythig:
LINK_LABEL.grid(column=0,row=0)
FIELD_ENTRY.grid(column=1,row=0)
BUTTONS_WIDGET.grid(column=1,row=2)
ADD_BUTTON.grid(column=0,row=0)
CANCEL_BUTTON.grid(column=1,row=0)
基本上我希望该函数调用并显示一个弹出窗口,我相信这可以做得更好一百万倍,但我只是在学习,但是我收到一个错误说: 顶层未定义
【问题讨论】:
-
每个文件都需要导入tkinter
-
当我在另一个文件上导入 tkinter 时,它说 root 没有定义
-
这是一个单独的问题。
标签: python function tkinter import toplevel