对于这个任务,我建议你使用一个垫子(http://docs.python.org/2/library/curses.html#curses.newpad):
pad 就像一个窗口,只是它不受屏幕大小的限制,也不一定与屏幕的特定部分相关联。[...] 一次只有窗口的一部分会出现在屏幕上。[...]
为了在您使用完curses后将pad的内容留在控制台上,我会从pad读回内容,结束curses并将内容写入标准输出。
以下代码实现了您所描述的。
#!/usr/bin/env python2
import curses
import time
# Create curses screen
scr = curses.initscr()
scr.keypad(True)
scr.refresh()
curses.noecho()
# Get screen width/height
height,width = scr.getmaxyx()
# Create a curses pad (pad size is height + 10)
mypad_height = height + 10
mypad = curses.newpad(mypad_height, width);
mypad.scrollok(True)
mypad_pos = 0
mypad_refresh = lambda: mypad.refresh(mypad_pos, 0, 0, 0, height-1, width)
mypad_refresh()
# Fill the window with text (note that 5 lines are lost forever)
for i in range(0, height + 15):
mypad.addstr("{0} This is a sample string...\n".format(i))
if i > height: mypad_pos = min(i - height, mypad_height - height)
mypad_refresh()
time.sleep(0.05)
# Wait for user to scroll or quit
running = True
while running:
ch = scr.getch()
if ch == curses.KEY_DOWN and mypad_pos < mypad_height - height:
mypad_pos += 1
mypad_refresh()
elif ch == curses.KEY_UP and mypad_pos > 0:
mypad_pos -= 1
mypad_refresh()
elif ch < 256 and chr(ch) == 'q':
running = False
# Store the current contents of pad
mypad_contents = []
for i in range(0, mypad_height):
mypad_contents.append(mypad.instr(i, 0))
# End curses
curses.endwin()
# Write the old contents of pad to console
print '\n'.join(mypad_contents)