如何将打印语句重定向到Tkinter文本小部件

如何将打印语句重定向到Tkinter文本小部件

您可能可以通过替换

sys.stdout

为自己的写入文本小部件的类似文件的对象来解决此问题。

例如：

import Tkinter as tkimport sysclass ExampleApp(tk.Tk):    def __init__(self):        tk.Tk.__init__(self)        toolbar = tk.frame(self)        toolbar.pack(side="top", fill="x")        b1 = tk.Button(self, text="print to stdout", command=self.print_stdout)        b2 = tk.Button(self, text="print to stderr", command=self.print_stderr)        b1.pack(in_=toolbar, side="left")        b2.pack(in_=toolbar, side="left")        self.text = tk.Text(self, wrap="word")        self.text.pack(side="top", fill="both", expand=True)        self.text.tag_configure("stderr", foreground="#b22222")        sys.stdout = TextRedirector(self.text, "stdout")        sys.stderr = TextRedirector(self.text, "stderr")    def print_stdout(self):        '''Illustrate that using 'print' writes to stdout'''        print "this is stdout"    def print_stderr(self):        '''Illustrate that we can write directly to stderr'''        sys.stderr.write("this is stderrn")class TextRedirector(object):    def __init__(self, widget, tag="stdout"):        self.widget = widget        self.tag = tag    def write(self, str):        self.widget.configure(state="normal")        self.widget.insert("end", str, (self.tag,))        self.widget.configure(state="disabled")app = ExampleApp()app.mainloop()