可以通过上下键 + Enter 来选择,Ctrl+C 取消
[注意] 只能支持 linux + macos
超过 20 个数据,会出现 ==== ^ ====
和 ==== v ====
提示还有额外数据
# -*- coding: utf-8 -*-
import sys
import termios
import tty
left = u'\u001b[1000D'
right = u'\u001b[1000C'
clear_line = u'\u001b[2K'
up = u'\u001b[1A'
down = u'\u001b[1B'
clear_to_bottom = u'\u001b[J'
MAX_SHOW_COUNT = 20
class CommandSingleSelector:
selectors = None
cur_index = 0
cursor_index = -1
header_word = None
is_cancel = False
top_index = 0
bottom_index = 0
def __init__(self, selectors, header_word):
self.selectors = selectors
if len(selectors) > MAX_SHOW_COUNT:
self.bottom_index = MAX_SHOW_COUNT
else:
self.bottom_index = len(selectors) - 1
self.header_word = header_word
def up(self):
if self.cur_index > 0:
self.cur_index = self.cur_index - 1
if self.cur_index < self.top_index:
self.top_index = self.top_index - 1
self.bottom_index = self.bottom_index - 1
self.print_multi_line()
def down(self):
if self.cur_index < len(self.selectors) - 1:
self.cur_index = self.cur_index + 1
if self.cur_index > self.bottom_index:
self.top_index = self.top_index + 1
self.bottom_index = self.bottom_index + 1
self.print_multi_line()
def exit(self):
self.clear_multi_line()
def get_selector(self):
sys.stdout.write(self.header_word + '\n')
self.print_multi_line()
is_multi_first = False
is_multi_second = False
while True:
fd = sys.stdin.fileno()
old_settings = termios.tcgetattr(fd)
try:
tty.setraw(sys.stdin.fileno())
ch = sys.stdin.read(1)
as_code = ord(ch)
# find the multi key for up/down
if as_code == 27:
is_multi_first = True
elif as_code == 91:
if is_multi_first:
is_multi_second = True
elif as_code == 65:
if is_multi_first and is_multi_second:
self.up()
is_multi_second = False
is_multi_first = False
elif as_code == 66:
if is_multi_first and is_multi_second:
self.down()
is_multi_second = False
is_multi_first = False
elif as_code == 13:
is_multi_second = False
is_multi_first = False
self.exit()
break
elif as_code == 3:
is_multi_second = False
is_multi_first = False
self.exit()
self.is_cancel = True
break
else:
is_multi_second = False
is_multi_first = False
finally:
termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
if self.is_cancel:
raise Exception('Cancel this operation.')
return self.selectors[self.cur_index]
def print_multi_line(self):
sys.stdout.write((self.cursor_index + 1) * up + left)
sys.stdout.write(clear_to_bottom)
up_size = self.bottom_index - self.cur_index + 1 + 1 + 1 # first and last word
has_first_sign = ' '
if self.top_index > 0:
has_first_sign = ' ==== ^ ===='
sys.stdout.write(left + clear_line + has_first_sign + '\n')
for index, item in enumerate(self.selectors):
if self.top_index <= index <= self.bottom_index:
first_word = ' '
if index == self.cur_index:
first_word = ' > '
sys.stdout.write(left + clear_line + first_word + item + '\n')
else:
sys.stdout.write(left + clear_line + first_word + item + '\n')
has_last_sign = ' '
if len(self.selectors) - 1 > self.bottom_index:
has_last_sign = ' ==== v ===='
sys.stdout.write(left + clear_line + has_last_sign + '\n')
back_to_cur_index = up * (up_size -1)
self.cursor_index = self.cur_index - self.top_index
sys.stdout.write(back_to_cur_index)
sys.stdout.write(left)
def clear_multi_line(self):
back_to_top = up * (self.cur_index - self.top_index + 2)
sys.stdout.write(back_to_top)
sys.stdout.write(left)
sys.stdout.write(clear_to_bottom)
if __name__ == '__main__':
selectors = ['HP Printer', 'XiaoMi Printer','DELL Printer']
command_selector = CommandSingleSelector(selectors=selectors, header_word='Please Select One Printer: ')
try:
sel = command_selector.get_selector()
print sel
except Exception, e:
print e.message
1
lisniuse 2020-11-25 21:11:24 +08:00
可以来这里分享: https://www.kuxai.com/forum
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2
ClericPy 2020-11-25 22:11:21 +08:00
以前倒是折腾过类似 terminal UI 的, 有三个库印象深刻 PyInquirer, console-menu, questionary
还好我只 star 最好的, 所以还能找到 |
3
renmu123 2020-11-25 22:40:45 +08:00
我最近再用一个 poetry 出品的 celo 工具,也是类似的交互式命令行工具,相比楼上的几个,弱化了交互式组件的部分,增强了作为命令行的部分(其实完全可以拼一起造个融合怪)
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4
frostming 2020-11-26 09:42:05 +08:00
Paging 嘛,rich 有现成的支持,prompt_toolkit 也有
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