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Question

我用curses为我的应用程序创建了一个简单的UI，我还使用herarchy结构（logmain，logmain.child1)等等。在

如果发生日志事件，日志将显示在我的UI中，这会破坏日志的显示。 我还创建了一个pad（myLogPad）来输出传入的日志，但是没有成功。 如何截获日志事件并将其打印在屏幕的特定区域（最后一行）？在

def setupLogger(name,file_name):
logger = logging.getLogger(name)
logger.setLevel(logging.DEBUG)
#formatter = logging.Formatter(
#    "%(asctime)s %(threadName)-11s %(levelname)-10s %(message)s")
formatter = logging.Formatter('%(asctime) -25s - %(name) -15s - %(levelname) -10s - %(message)s')
formatterDisplay = logging.Formatter('%(asctime)-8s|%(name)-12s|%(levelname)-6s|%(message)-s', '%H:%M:%S')
# Alternative formatting available on python 3.2+:
# formatter = logging.Formatter(
#     "{asctime} {threadName:>11} {levelname} {message}", style='{')

# Log to file
filehandler = logging.FileHandler(file_name, 'w')

filehandler.setFormatter(formatter)
logger.addHandler(filehandler)

# Log to stdout too
streamhandler = logging.StreamHandler()

streamhandler.setFormatter(formatterDisplay)
logger.addHandler(streamhandler)

我尝试在streamhandler=日志记录.StreamHandler（）但没有成功。 有什么想法吗？ 谢谢你

Answer 1

{{cd2>你可以创建一个

try:
    unicode
    _unicode = True
except NameError:
    _unicode = False

class CursesHandler(logging.Handler):
    def __init__(self, screen):
        logging.Handler.__init__(self)
        self.screen = screen
    def emit(self, record):
        try:
            msg = self.format(record)
            screen = self.screen
            fs = "\n%s"
            if not _unicode: #if no unicode support...
                screen.addstr(fs % msg)
                screen.refresh()
            else:
                try:
                    if (isinstance(msg, unicode) ):
                        ufs = u'\n%s'
                        try:
                            screen.addstr(ufs % msg)
                            screen.refresh()
                        except UnicodeEncodeError:
                            screen.addstr((ufs % msg).encode(code))
                            screen.refresh()
                    else:
                        screen.addstr(fs % msg)
                        screen.refresh()
                except UnicodeError:
                    screen.addstr(fs % msg.encode("UTF-8"))
                    screen.refresh()
        except (KeyboardInterrupt, SystemExit):
            raise
        except:
            self.handleError(record)

（这基本上是从logging.StreamHandler复制的。） 窗口或键盘需要初始化以允许自动滚动等：

^{pr2}$

这里，screen是主curses屏幕。在

Answer 2

多亏了@zeemonkez我解决了这个问题。 下面是完整的代码示例：

import logging
import curses
import time

class CursesHandler(logging.Handler):
    def __init__(self, screen):
        logging.Handler.__init__(self)
        self.screen = screen
    def emit(self, record):
        try:
            msg = self.format(record)
            screen = self.screen
            fs = "\n%s"
            if not _unicode: #if no unicode support...
                screen.addstr(fs % msg)
                screen.refresh()
            else:
                try:
                    if (isinstance(msg, unicode) ):
                        ufs = u'\n%s'
                        try:
                            screen.addstr(ufs % msg)
                            screen.refresh()
                        except UnicodeEncodeError:
                            screen.addstr((ufs % msg).encode(code))
                            screen.refresh()
                    else:
                        screen.addstr(fs % msg)
                        screen.refresh()
                except UnicodeError:
                    screen.addstr(fs % msg.encode("UTF-8"))
                    screen.refresh()
        except (KeyboardInterrupt, SystemExit):
            raise
        except:
            self.handleError(record)


try:
    _unicode = True
    screen = curses.initscr()
    screen.nodelay(1)
    maxy, maxx = screen.getmaxyx()
    begin_x = 2; begin_y = maxy-5
    height = 5; width = maxx-4
    win = curses.newwin(height, width, begin_y, begin_x)
    curses.setsyx(-1, -1)
    screen.addstr("Testing my curses app")
    screen.refresh()
    win.refresh()
    win.scrollok(True)
    win.idlok(True)
    win.leaveok(True)
    mh = CursesHandler(win)
    formatter = logging.Formatter('%(asctime) -25s - %(name) -15s - %(levelname) -10s - %(message)s')
    formatterDisplay = logging.Formatter('%(asctime)-8s|%(name)-12s|%(levelname)-6s|%(message)-s', '%H:%M:%S')
    mh.setFormatter(formatterDisplay)
    logger = logging.getLogger('myLog')
    logger.addHandler(mh)


    for i in range(10):
        logger.error('message ' + str(i))
        time.sleep(1)


    curses.curs_set(1)
    curses.nocbreak()
    curses.echo()
    curses.endwin()

except NameError:
    _unicode = False