可以对？显示帮助信息，需要立即获取输入的字符，因此需要用到termios模块

另外需要对tab键做处理，当按下tab键时可以进行自动补全

#! /usr/bin/env python# coding=utf-8 import osimport sysimport ttyimport termios '''Enter: 13Back: 127?: 63C-h: 8C-w: 23Tab: 9C-u: 21C-c: 3C-d: 4C-\: 28SPACE: 32''' CLI_KEY_CNCR = 13CLI_KEY_BACK = 127CLI_KEY_QMARK = 63CLI_KEY_CTRLH = 8CLI_KEY_CTRLW = 23CLI_KEY_TAB = 9CLI_KEY_CTRLU = 21CLI_KEY_CTRLC = 3CLI_KEY_CTRLD = 4CLI_KEY_QUIT = 28CLI_KEY_SPACE = 32CLI_KEY_TABLEN = 4 class CLI(object): def __init__(self): self.line = '' self.line_complete = '' self.completer_on = False self.completer_dict = {} self.completer_dict_keys = self.completer_dict.keys() self.completer_id = 0 self.completer_cnt = len(self.completer_dict) def getch(self): fd = sys.stdin.fileno() old_settings = termios.tcgetattr(fd) try: tty.setraw(fd) ch = sys.stdin.read(1) finally: termios.tcsetattr(fd, termios.TCSADRAIN, old_settings) return ch def completer_kw_update(self): self.completer_dict_keys = self.completer_dict.keys() self.completer_dict_keys.sort() self.completer_cnt = len(self.completer_dict) def completer_kw_add(self, key, word): self.completer_dict[key] = word self.completer_kw_update() def completer_kw_clear(self): self.completer_dict.clear() self.completer_id_update() def completer_id_update(self): self.completer_kw_update() if self.completer_id < self.completer_cnt - 1: self.completer_id += 1 else: self.completer_id = 0 def completer_wd_select(self, word): if not word: return '' cnt = self.completer_cnt while cnt>0: completer = self.completer_dict_keys[self.completer_id] self.completer_id_update() cnt -= 1 if word == completer[:len(word)]: return completer[len(word):] return '' def printf(self, info=''): sys.stdout.write(info) def show_spec_len_str(self, info, maxlen, spacech=' '): 'display a string of the specified length' maxlen = maxlen infolen = len(info) if maxlen < infolen: maxlen = infolen while infolen>0: ch = info[-infolen] for i in range(self.char_memory_len(ch)): self.printf(info[i-infolen]) infolen -= self.char_memory_len(ch) maxlen -= self.char_display_len(ch) while maxlen>0: self.printf(spacech) maxlen -= self.char_display_len(spacech) def show_help_info(self): if self.completer_on: line = self.line_complete else: line = self.line lastwd = '' show_all = False if not line or line[-1] == ' ': show_all = True else: lastwd = line.split()[-1] if self.completer_dict: maxlen = max([len(info) for info in self.completer_dict]) else: maxlen = 12 for info in self.completer_dict: if show_all or lastwd == info[:len(lastwd)]: self.printf(' ') self.show_spec_len_str(info, maxlen) self.printf(' ') self.printf(self.completer_dict[info]) self.printf('\r\n') def is_chinese_char(self, ch): return ord(ch) > 127 def char_display_len(self, ch): if self.is_chinese_char(ch): return 2 elif ord(ch) == CLI_KEY_TAB: return CLI_KEY_TABLEN else: return 1 def char_memory_len(self, ch): if self.is_chinese_char(ch): return 3 else: return 1 def rm_last_char(self, line): lastch = '' rmlen = 0 if len(line)>0: lastch = line[-1] self.printf('\b \b' * self.char_display_len(lastch)) rmlen = self.char_memory_len(lastch) if len(line) >= rmlen: line = line[:-(rmlen)] else: rmlen = len(line) line = '' return rmlen, line def rm_last_word(self, line): lastwd = '' linelen = len(line) rspacelen = linelen - len(line.rstrip()) if not linelen: return line lastwd = line.split()[-1] backlen = len(lastwd) + rspacelen rmlen = 0 while backlen>0 and line: rmlen, line = self.rm_last_char(line) backlen -= rmlen return line def rm_one_line(self, line): rmlen = 0 while line: rmlen, line = self.rm_last_char(line) return line def do_line_complete_proc(self): line = self.line line_complete = self.line_complete lastwd = '' self.printf('\r\n') if self.line_complete: self.printf(self.line_complete) else: self.printf(self.line) if not line: return line lastwd = line.split()[-1] completer = self.completer_wd_select(lastwd) if not completer.strip(): self.line_complete = line return line backlen = len(line_complete) - len(line) while backlen>0 and line_complete: rmlen, line_complete = self.rm_last_char(line_complete) backlen -= rmlen self.printf(completer) line_complete = line + completer self.line_complete = line_complete def do_line_complete_end(self): if self.completer_on: self.line = self.line_complete self.line_complete = '' self.completer_on = False def get_line(self): self.line = '' self.line_complete = '' self.completer_on = False while True: ch = self.getch() if ch == '\r' or ch == '\n': self.do_line_complete_end() self.printf('\r\n') break elif ord(ch) == CLI_KEY_BACK or ord(ch) == CLI_KEY_CTRLH: if self.completer_on: rmlen, self.line_complete = self.rm_last_char(self.line_complete) else: rmlen, self.line = self.rm_last_char(self.line) self.do_line_complete_end() elif ord(ch) == CLI_KEY_QMARK: self.printf('?') self.printf('\r\n') self.show_help_info() if self.completer_on: self.printf(self.line_complete) else: self.printf(self.line) elif ord(ch) == CLI_KEY_CTRLW: if self.completer_on: self.line_complete = self.rm_last_word(self.line_complete) else: self.line = self.rm_last_word(self.line) self.do_line_complete_end() elif ord(ch) == CLI_KEY_TAB: self.completer_on = True self.do_line_complete_proc() elif ord(ch) == CLI_KEY_CTRLD: if self.line: return self.line else: return ch elif ord(ch) == CLI_KEY_QUIT: self.printf('\r\n Interrupted by <Ctrl-\>.\r\n') sys.exit() elif ord(ch) == CLI_KEY_CTRLU: if self.completer_on: self.line_complete = self.rm_one_line(self.line_complete) else: self.line = self.rm_one_line(self.line) self.do_line_complete_end() elif ord(ch) == CLI_KEY_SPACE: self.printf(ch) if self.completer_on: self.line_complete += ch else: self.line += ch else: self.printf(ch) self.do_line_complete_end() self.line += ch # chinese qmask proc if ord(ch) == 159 and len(self.line)>= 3 and self.line[-3:] == '\xef\xbc\x9f': self.printf('\r\n') self.line = self.line[:-3] self.show_help_info() self.printf(self.line) return self.line def get_raw_line(self): self.raw_line = '' while True: ch = self.getch() if ch == '\r' or ch == '\n': self.printf('\r\n') break elif ord(ch) == CLI_KEY_BACK or ord(ch) == CLI_KEY_CTRLH: rmlen, self.raw_line = self.rm_last_char(self.raw_line) elif ord(ch) == CLI_KEY_CTRLW: self.raw_line = self.rm_last_word(self.raw_line) elif ord(ch) == CLI_KEY_TAB: self.printf(' ' * self.char_display_len(ch)) self.raw_line += ch elif ord(ch) == CLI_KEY_CTRLD: if self.raw_line: return self.raw_line else: return ch elif ord(ch) == CLI_KEY_QUIT: self.printf('\r\n Interrupted by <Ctrl-\>.\r\n') sys.exit() elif ord(ch) == CLI_KEY_CTRLU: self.raw_line = self.rm_one_line(self.raw_line) else: self.raw_line += ch self.printf(ch) return self.raw_line def test(): cli = CLI() help_info = { 'hello0': 'say hello 0', 'hello1': 'say hello 1', 'hellohello': 'say hello hello', 'hellohehe': 'say hello hehe', 'hellohi': 'say hello hi', '你好啊': 'say 你好啊', '你好吗': 'say 你好吗', '你好哈': 'say 你好哈', } for key in help_info: cli.completer_kw_add(key, help_info[key]) while True: line = cli.get_line() if len(line) == 1 and ord(line[0]) == CLI_KEY_CTRLD: break if line == 'quit': break print(line) if __name__ == "__main__": test()

以上这篇使用python模拟命令行终端的示例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。