Python ncurses 10,10 pad在将str添加到9,9时导致错误
在声明了一个10乘10的pad之后,我显然无法在没有错误的情况下写入右下角9、9。这是怎么回事Python ncurses 10,10 pad在将str添加到9,9时导致错误,python,ncurses,python-curses,Python,Ncurses,Python Curses,在声明了一个10乘10的pad之后,我显然无法在没有错误的情况下写入右下角9、9。这是怎么回事 import curses def start(stdscr): curses.curs_set(0) movement = curses.newpad(10, 10) movement.addstr(8, 9, '+') movement.addstr(9, 8, '+') movement.addstr(9, 9, '+') #This line ca
import curses
def start(stdscr):
curses.curs_set(0)
movement = curses.newpad(10, 10)
movement.addstr(8, 9, '+')
movement.addstr(9, 8, '+')
movement.addstr(9, 9, '+') #This line causes an error
if __name__ == '__main__':
curses.wrapper(start)
原因:
File "curses_movement_testing.py", line 35, in <module>
curses.wrapper(start)
File "/usr/lib64/python2.6/curses/wrapper.py", line 43, in wrapper
return func(stdscr, *args, **kwds)
File "curses_movement_testing.py", line 10, in start
movement.addstr(9, 9, '+')
_curses.error: addstr() returned ERR
文件“curses\u movement\u testing.py”,第35行,在
curses.wrapper(开始)
文件“/usr/lib64/python2.6/curses/wrapper.py”,第43行,在wrapper中
返回函数(stdscr,*args,**kwds)
文件“curses\u movement\u testing.py”,第10行,开头
movement.addstr(9,9,“+”)
_curses.error:addstr()返回错误
为什么我不能写入右下角的单元格?问题是添加的字符导致尝试滚动键盘,并且滚动被禁用。字符已成功添加(至少在我的系统的ncurses实现中):如果捕获错误并更新屏幕,您应该会看到它:
import curses, time
def start(stdscr):
curses.start_color()
try:
curses.curs_set(0)
except curses.error:
pass
movement = curses.newpad(10, 10)
movement.addstr(8, 9, '+')
movement.addstr(9, 8, '+')
try:
movement.addstr(9, 9, '+')
except curses.error:
movement.addstr(0, 0, 'CAUGHT')
movement.refresh(0, 0, 0, 0, 9, 9)
curses.doupdate()
time.sleep(1)
if __name__ == '__main__':
curses.wrapper(start)
如果在写入到右下角之前调用movement.scrollok(True)
,则不会出现错误,但窗口将滚动:可能不是您想要的
由于pad可能比实际屏幕大,一个简单的解决方案是在要刷新的部件下方添加一条额外的线。您可以检查是否已写入将不显示的零件。最后一个例子是:
import curses, sys, time
def start(stdscr):
curses.start_color()
try:
curses.curs_set(0)
except curses.error:
pass
movement = curses.newpad(11, 10)
movement.addstr(8, 9, '+')
movement.addstr(9, 8, '+')
text = sys.argv[1] if len(sys.argv) > 1 else '+'
try:
movement.addstr(9, 9, text)
y, x = movement.getyx()
except curses.error:
y, x = movement.getyx()
movement.addstr(0, 0, 'CAUGHT')
if y >= 10 and x > 0:
movement.addstr(1, 0, 'toolong')
movement.refresh(0, 0, 0, 0, 9, 9)
curses.doupdate()
time.sleep(1)
if __name__ == '__main__':
curses.wrapper(start)
以python cursex.py
的形式运行,会出现加号;以python cursex.py foo
运行,会出现f
和toolong
消息;以python cursex.py waytoolongtofit
运行,w
、catch
和toolong
消息都会出现