Python,快速和Glade,在文本视图中显示stdout
我花了很长时间寻找一种方法来做到这一点,但到目前为止,我什么也没想到( 我正在尝试为我制作的一个小CLI程序制作GUI,所以我认为使用Ubuntu的“快速”将是最简单的方法。基本上,它似乎使用Glade来制作GUI。我知道我需要在子进程中运行CLI后端,然后将stdout和stderr发送到textview。但我不知道如何做到这一点 这是Glade/Quick为我希望输出显示在其中的对话框创建的代码:Python,快速和Glade,在文本视图中显示stdout,python,ubuntu,gtk,textview,subprocess,Python,Ubuntu,Gtk,Textview,Subprocess,我花了很长时间寻找一种方法来做到这一点,但到目前为止,我什么也没想到( 我正在尝试为我制作的一个小CLI程序制作GUI,所以我认为使用Ubuntu的“快速”将是最简单的方法。基本上,它似乎使用Glade来制作GUI。我知道我需要在子进程中运行CLI后端,然后将stdout和stderr发送到textview。但我不知道如何做到这一点 这是Glade/Quick为我希望输出显示在其中的对话框创建的代码: from gi.repository import Gtk # pylint: disable
from gi.repository import Gtk # pylint: disable=E0611
from onice_lib.helpers import get_builder
import gettext
from gettext import gettext as _
gettext.textdomain('onice')
class BackupDialog(Gtk.Dialog):
__gtype_name__ = "BackupDialog"
def __new__(cls):
"""Special static method that's automatically called by Python when
constructing a new instance of this class.
Returns a fully instantiated BackupDialog object.
"""
builder = get_builder('BackupDialog')
new_object = builder.get_object('backup_dialog')
new_object.finish_initializing(builder)
return new_object
def finish_initializing(self, builder):
"""Called when we're finished initializing.
finish_initalizing should be called after parsing the ui definition
and creating a BackupDialog object with it in order to
finish initializing the start of the new BackupDialog
instance.
"""
# Get a reference to the builder and set up the signals.
self.builder = builder
self.ui = builder.get_ui(self)
self.test = False
def on_btn_cancel_now_clicked(self, widget, data=None):
# TODO: Send SIGTERM to the subprocess
self.destroy()
if __name__ == "__main__":
dialog = BackupDialog()
dialog.show()
Gtk.main()
如果我把它放在finish_初始化函数中
backend_process = subprocess.Popen(["python", <path to backend>], stdout=subprocess.PIPE, shell=False)
但我只需要知道如何在每次有新的stdout时调用它
但我只需要知道如何在每次有新的stdout时调用它
您可以使用GObject.io\u add\u watch
监视子流程的输出,或者创建一个单独的线程来读取子流程
# read from subprocess
def read_data(source, condition):
line = source.readline() # might block
if not line:
source.close()
return False # stop reading
# update text
label.set_text('Subprocess output: %r' % (line.strip(),))
return True # continue reading
io_id = GObject.io_add_watch(proc.stdout, GObject.IO_IN, read_data)
或者使用线程:
# read from subprocess in a separate thread
def reader_thread(proc, update_text):
with closing(proc.stdout) as file:
for line in iter(file.readline, b''):
# execute update_text() in GUI thread
GObject.idle_add(update_text, 'Subprocess output: %r' % (
line.strip(),))
t = Thread(target=reader_thread, args=[proc, label.set_text])
t.daemon = True # exit with the program
t.start()
# read from subprocess in a separate thread
def reader_thread(proc, update_text):
with closing(proc.stdout) as file:
for line in iter(file.readline, b''):
# execute update_text() in GUI thread
GObject.idle_add(update_text, 'Subprocess output: %r' % (
line.strip(),))
t = Thread(target=reader_thread, args=[proc, label.set_text])
t.daemon = True # exit with the program
t.start()