我有一个代码,在这里我尝试不同的Tkinter小部件,但是Colab发回一个错误,说没有显示名称或变量。确切的错误消息如下所示:
TclError Traceback (most recent call last)
<ipython-input-5-7b43f8be599d> in <module>()
----> 1 form = tk.Tk()
/usr/lib/python3.6/tkinter/__init__.py in __init__(self, screenName, baseName, className, useTk, sync, use)
2021 baseName = baseName + ext
2022 interactive = 0
-> 2023 self.tk = _tkinter.create(screenName, baseName, className, interactive, wantobjects, useTk, sync, use)
2024 if useTk:
2025 self._loadtk()
TclError: no display name and no $DISPLAY environment variable
有办法解决这个问题吗?代码是这样的:
import tkinter as tk
from tkinter import ttk
from tkinter import messagebox
from tkinter import filedialog
def fOpen():
print(filedialog.askopenfilename(initialdir = "/",title = "Open file",filetypes = (("Python files","*.py;*.pyw"),("All files","*.*"))))
def ExitF():
form.destroy()
def fSave():
print(filedialog.asksaveasfilename(initialdir = "/",title = "Save as",filetypes = (("Python files","*.py;*.pyw"),("All files","*.*"))))
form = tk.Tk()
form.title("Colab Form")
menubar = tk.Menu(form)
filemenu = tk.Menu(menubar,tearoff=0)
filemenu.add_command(label="Open", command = fOpen)
filemenu.add_command(label="Save", command = fSave)
filemenu.add_command(label="Exit", command = ExitF)
menubar.add_cascade(label="File", menu=filemenu)
form.config(menu=menubar)
#Listbox with attached scrollbar
scrollbar=tk.Scrollbar(form)
mylist = tk.Listbox(form, yscrollcommand = scrollbar.set )
for line in range(100):
mylist.insert("end", "This is line number " + str(line))
mylist.grid(row=7,column=1,rowspan=3, sticky='e', padx=25, pady=25)
scrollbar.config( command = mylist.yview )
scrollbar.grid(row=7, column=2, rowspan=3, sticky='nsw', padx=25, pady=25)
form.mainloop()
发布于 2020-04-11 23:53:34
正如运行健身房-在谷歌竞技场上露台所说,您需要运行一个框架缓冲区服务器(它将模拟一个图形屏幕)并创建一个指向它的DISPLAY
envvar。
!apt-get install -y xvfb # Install X Virtual Frame Buffer
import os
os.system('Xvfb :1 -screen 0 1600x1200x16 &') # create virtual display with size 1600x1200 and 16 bit color. Color can be changed to 24 or 8
os.environ['DISPLAY']=':1.0' # tell X clients to use our virtual DISPLAY :1.0
但是,如果您想要与GUI交互,这将是困难的,因为Colab不支持开箱即用的交互式屏幕。
发布于 2020-04-12 00:12:08
No.
从简介到google:
Colab笔记本在Google云服务器上执行代码
服务器通常连显示器都没有。即使他们看到了,你也不会看到。您必须在台式机或膝上型计算机上运行Python才能使用tkinter
。
此外,colab环境是IPython笔记本的一种形式,它实际上不是一个标准的Python环境。即使您在本地运行tkinter
,我也不建议尝试从IPython笔记本上运行IPython程序。
https://stackoverflow.com/questions/61168210
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