我正在将stdout和stderr重定向到tkinter文本小部件，在我的程序崩溃的某些输出之后，我认为它应该与缓冲问题有关 我该怎么办？
我制作了一个产生错误的可测试版本，以生成错误： 1-运行代码，按开始， 2-Type help并按Enter键（重复步骤（2）4-5次 甚至更多它的随机性）
import Tkinter as tk
import ttk
import sys
import re
import threading
Large_Font= ("Verdana", 12)
Norm_Font= ("Verdana", 10)
Small_Font=("Verdana", 8)
cmdList = ["command1",
"command1",
"command1",
"command1",
"command1",
"command1",
"command1",
"command1",
"command1",
"command1",
"command1",
"command1"]
def gui_Input(Data) :
user_input = Data
user_input = user_input.strip();
user_input = re.sub("\s{2,}" , " ", user_input)
inp = user_input.split(' ', 1)
cmd = inp[0]
if cmd == 'help' :
if len(inp) == 1 :
print "\navailable commands:\n"
for c in sorted(cmdList) :
print " " + c
return
##
## GUI
##
def threadit(var):
thread1 = threading.Thread(target = gui_Input, args =[var])
thread1.start()
class shellGUI(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
tk.Tk.title(self, "cmd")
# Main Container of mosh application
container = tk.Frame(self)
container.pack(side="top", fill="both", expand = True)
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1)
self.frames = {} # instances Dict
for F in (Startpage, Landpage):
frame = F(container,self)
self.frames[F] = frame
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame(Landpage)
def show_frame(self, cont):
frame = self.frames[cont]
frame.tkraise()
class Landpage(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.configure(background="white")
self.button6 = tk.Button(self, text="Start",
command= lambda: controller.show_frame(Startpage)
,font= Large_Font, height = 1, width = 13)
self.button6.place(relx=.445, rely=.75)
class Startpage(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self,parent)
self.configure(background="#cae1ff")
# NoteBook
self.nb = ttk.Notebook(self, name='nb',height=252, width=1040,) # create Notebook in "master"
self.nb.place(relx=.005, rely=.62) # fill "master" but pad sides
# Command Line Tab
self.master_cmd = ttk.Frame(self.nb, name='master-cmd')
self.rx_textbox = tk.Text(self.master_cmd, height=13,
width=127,font=Norm_Font)
self.rx_textbox.place(relx=.0, rely=.0)
self.rx_textbox.tag_configure("stderr", foreground="red")
self.rx_textbox.bind('<ButtonRelease-1>', self.takeFocus)
sys.stdout = TextRedirector(self.rx_textbox, "stdout")
sys.stderr = TextRedirector(self.rx_textbox, "stderr")
self.cmd_entrybox = tk.Entry(self.master_cmd, width=127, font=Norm_Font)
self.contents = tk.StringVar()
self.cmd_entrybox.config(textvariable=self.contents)
self.cmd_entrybox.bind('<Key-Return>', self.Button_Bind)
self.cmd_entrybox.place(relx=.0, rely=.835)
scrollb = tk.Scrollbar(self.master_cmd ,command=self.rx_textbox.yview)
scrollb.place(relx =.985 , rely=.0, height = 250)
self.rx_textbox['yscrollcommand'] = scrollb.set
self.nb.add(self.master_cmd, text="Command Line ")
def Button_Bind(self,event):
var = self.contents.get()
self.cmd_entrybox.delete(0, "end")
threadit(var)
def takeFocus(self,event):
self.cmd_entrybox.focus()
class TextRedirector(object):
def __init__(self, widget, tag="stdout"):
self.widget = widget
self.tag = tag
def write(self, strng):
self.widget.configure(state="normal")
self.widget.insert("end",' '+ strng, (self.tag,))
self.widget.configure(state="disabled")
self.widget.see(tk.END)
pad=3
app= shellGUI()
app.geometry("{0}x{1}+0+0".format(
app.winfo_screenwidth()-pad, app.winfo_screenheight()-pad))
app.resizable(width=False, height=False)
print '\nEnter your commands below.\r\nType "help" for a list of commands, type "exit" to leave'
app.mainloop()