标签: python-curses

我试图运行这个:

from blessings import Terminal

t = Terminal()

print (t.bold('Hi there!'))
print (t.bold_red_on_bright_green('It hurts my eyes!'))

with t.location(0, t.height - 1):
    print ('This is at the bottom.')

这是第一个例子:https://pypi.python.org/pypi/blessings.

但是,我收到此错误:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Users\?????\AppData\Local\Programs\Python\Python35-     32\lib\site-packages\blessings\__init__.py", line 5, in <module>
    import curses
  File "C:\Users\?????\AppData\Local\Programs\Python\Python35-32\lib\curses\__init__.py", line 13, in <module>
    from _curses import *
ImportError: No module named '_curses'

我的系统是win10 x64.

在Python curses模块中,我观察到按下esc键和getch()返回之间有大约1秒的延迟.其他键似乎没有发生此延迟.为什么会发生这种情况,我该怎么办呢？

测试用例:

import curses
import time

def get_delay(window, key):
    while True:
        start = time.time()
        ch = window.getch()
        end = time.time()
        if ch == key:
            return end-start

def main(stdscr):
    stdscr.clear()
    stdscr.nodelay(1)

    stdscr.addstr("Press ESC")
    esc_delay = get_delay(stdscr, 27)

    stdscr.addstr("\nPress SPACE")
    space_delay = get_delay(stdscr, ord(' '))

    return esc_delay, space_delay

if __name__ == '__main__':
    esc_delay, space_delay = curses.wrapper(main)
    print("Escape delay: {} ms".format(esc_delay*1000))
    print("Space delay: {} ms".format(space_delay*1000))

结果:

Escape delay: 1001.09195709 ms
Space delay: 0.00596046447754 ms

我有以下代码,允许您向上和向下滚动文本垫.每次滚动(即处理用户输入)时,打击垫都会按预期更新.但是,在按下第一个键之前没有显示任何内容,尽管我正在调用pad.refresh(),就像我在每个用户输入后一样.

我的代码看起来像这样:

def main(self,stdscr):

    x,y = 20,150 # size of the window
    u,a = 10,20 # where to place window - up,across
    pad = curses.newpad(20,150) # nlines, ncols
    pad_pos = 0
    exit = False

    pad.addstr(0,0,str(self.all_results))

    while not exit:
        pad.addstr(0,0,str(self.format_results()))
        ++ stdscr.refresh()
        pad.refresh(pad_pos,10, u,a, x,y)

        -- cmd = stdscr.getch()
        ++ cmd = pad.getch()

        stdscr.nodelay(1)

        + pad.getch() - caused the screen not to update
        + stdscr.refresh() - no change

        if cmd != -1:
            + pad.getch() - - caused the screen not to …

我开始学习Python中的curses.我在Mac OS X上使用Python 3.5.当我尝试在右下角写入时,程序崩溃并出现以下错误:

$ python ex_curses.py
[...]
  File "ex_curses.py", line 19, in do_curses
    screen.addch(mlines, mcols, 'c')
  _curses.error: add_wch() returned ERR

示例程序是:

import curses

def do_curses(screen):
    curses.noecho()
    curses.curs_set(0)
    screen.keypad(1)

    (line, col) = 12, 0
    screen.addstr(line, col, "Hello world!")
    line += 1
    screen.addstr(line, col, "Hello world!", curses.A_REVERSE)

    screen.addch(0, 0, "c")

    (mlines, mcols) = screen.getmaxyx()
    mlines -= 1
    mcols -= 1
    screen.addch(mlines, mcols, 'c')

    while True:
        event = screen.getch()
        if event == ord("q"):
            break
    curses.endwin()

if __name__ == "__main__":
    curses.wrapper(do_curses)

我有一种感觉,我错过了一些明显的东西,但我不知道是什么.

我正在尝试创建一个小的Python/curses应用程序.

但据我可以看到有没有办法知道是否 CTRL+ J或Enter已被按下.现在这可能是因为它们都具有相同的ascii代码(10):

http://en.wikipedia.org/wiki/Control_character#In_ASCII

但VIM如何区分这两者呢？

我有一个bash脚本打印一个漂亮的大彩色表,使用转义代码生成前景和背景tput.我的curses应用程序需要调用此bash脚本并将输出放在屏幕上.

当我尝试这样做时,curses会以堆栈跟踪结束爆炸:

File "./dostuff.py", line 38, in print_art
    screen.addstr(y, x_start, line)
TypeError: must be str, not bytes

其中"线"是这样的:

'\x1b[44m\x1b[30mcard major minor revision runs updated\x1b(B\x1b[m\x1b(B\x1b[m\n'

有没有办法让诅咒解释这些颜色代码？我可以使用颜色代码对字符串进行任何处理以使curses显示它吗？或者我必须基本上从bash脚本中删除颜色,然后重新实现python中的着色？

编辑:

获取bash输出的命令类似于:

print_art(subprocess.Popen(["./automount", "backup", "list"], stdout=subprocess.PIPE).communicate()[0])

通过调用decode()字节字符串,我可以使用curses来打印字符串,尽管有文字转义序列.除非我听到其他人的意见,否则我只是手动解析这些文字转义序列并转换为使用curses颜色方法.

我在Raspberry Pi 3上运行了一个python 2.7脚本.

class UIThread(threading.Thread):

   def __init__(self, threadID, name, counter, U):

    threading.Thread.__init__(self)

    self.threadID = threadID

    self.name = name

    self.counter = counter

    self.U = U

  def run(self):

    self.U.run()

def main():

  time.sleep(3)

  try:
     try:
         ###launch a UI running as background thread#####
         U = UIlib.UI()
         thread1 = UIThread(1, "UI", 1, U)
         thread1.daemon = True
         thread1.start()

     except:
         ###if there is no monitor, lanch a fake UI class#######
         U = UIlib.nomonitorUI()
         thread1 = UIThread(1, "NMUI", 1, U)
         thread1.daemon = True
         thread1.start()

         print "No Monitor …

我正在尝试使用cursestextpad.Textbox()函数进行文本输入。到目前为止，一切工作正常，但是，某些键无法识别，包括部分符号（\xc2\xa7）和所有德语变音符号（\xc3\xa4/\xc3\xb6/\xc3\xbc）。我想这与文本编码有某种关系，但我不知道如何解决这个问题。我的德语键盘布局与input().

这是一些最小的例子：

    import curses\n    import curses.textpad as textpad\n\n    try:\n        stdtscr = curses.initscr()\n        curses.cbreak()\n        stdtscr.keypad(1)\n        curses.noecho()\n\n        textpad.Textbox(stdtscr).edit()\n\n    finally:\n        curses.nocbreak()\n        stdtscr.keypad(0)\n        curses.echo()\n        curses.endwin()\n

我在使用 Curses 模块检测 Backspace 键时遇到了困难。每当我按退格键时，返回的字符/字符串是“^？”，但是我无法通过以下方式检测到它：

如果 str(key) == '^?':

下面的代码设置为运行

import curses

def main(win):
    win.nodelay(True)
    key = ''
    record = ''
    win.clear()
    win.addstr("Key:")
    win.addstr('\n\nRecord:')
    win.addstr(record)
    while True:
        try:
            key = win.getkey()

            if str(key) == '^?':
                # Attempt at detecting the Backspace key
                record = record[:-1]

            elif str(key) == '\n':
                # Attempt at detecting the Enter Key
                record = ''

            else:
                record += str(key)
            win.clear()
            win.addstr("Key:")
            win.addstr(str(key))
            win.addstr('\n\nRecord:')
            win.addstr(record)
            if key == os.linesep:
                break
        except Exception as e:
            # No input …

我正在Python中运行一个多处理系统，我计划使用curses将终端窗口分为4个象限，并在其中一个象限中显示每个进程的输出。

所以，最终的输出应该类似于：

--------------------------------
|               |               |
|   PROCESS01   |   PROCESS02   |
|               |               |
---------------------------------
|               |               |
|   PROCESS03   |   PROCESS04   |
|               |               |
---------------------------------

到目前为止，我尝试将窗口分成 4 个部分，如下所示：

--------------------------------
|               |               |
|   PROCESS01   |   PROCESS02   |
|               |               |
---------------------------------
|               |               |
|   PROCESS03   |   PROCESS04   |
|               |               |
---------------------------------

但我收到错误：

File "screen_show.py", line 78, in <module> main()
                                                                                                          File "screen_show.py", line 46, in main
                                                                                                                                                     pad12.refresh(0,cols_mid, 0,cols_mid, rows_mid,cols_tot-1)
_curses.error: prefresh() returned ERR