如何将Tab键发送到python子进程的stdin [英] how to send tab-key to python subprocess's stdin

问题描述

背景:我有一个Python子进程，该子进程连接到类似shell的应用程序，该应用程序使用readline库处理输入，并且该应用程序具有TAB完整的例程来执行命令输入，就像重击.生成子进程，如下所示:

Background: I have a Python subprocess that connects to a shell-like application, which uses the readline library to handle input, and that app has a TAB-complete routine for command input, just like bash. The child process is spawned, like so:

def get_cli_subprocess_handle():
    return subprocess.Popen(
                            '/bin/myshell',
                            shell=False,
                            stdin=subprocess.PIPE,
                            stdout=subprocess.PIPE,
                            stderr=subprocess.STDOUT,
                            )

一切都很好，除了制表符完整.每当我的Python程序将制表符'\t'传递给子进程时，我在STDIN中获得5个空格，而不是触发readline库的制表完成例程. :(

Everything works great, except tab-complete. Whenever my Python program passes the tab character, '\t' to the subprocess, I get 5 spaces in the STDIN, instead of triggering the readline library's tab-complete routine. :(

问题:我可以发送什么到子流程的STDIN来触发孩子的制表符完成功能?可能会问另一种方式:如何发送TAB 密钥 ，而不是TAB 字符 甚至有可能吗?

Question: What can I send to the subprocess's STDIN to trigger the child's tab-complete function? Maybe asked another way: How do I send the TAB key as opposed to the TAB character, if that is even possible?

相关但未答复且出轨:

围绕python批处理过程的触发选项卡完成readline

推荐答案

类似于shell的应用程序可能会区分连接到stdin的终端和连接到stdin的管道.许多Unix实用程序这样做只是为了优化其缓冲(行与块)，而类似shell的实用程序可能会禁用批输入(即PIPE)上的命令完成功能，以避免意外的结果.命令完成实际上是一种交互式功能，需要终端输入.

The shell like application is probably differentiating between a terminal being connected to stdin and a pipe being connected to it. Many Unix utilities do just that to optimise their buffering (line vs. block) and shell-like utilities are likely to disable command completion facilities on batch input (i.e. PIPE) to avoid unexpected results. Command completion is really an interactive feature which requires a terminal input.

检出pty模块，并尝试使用主/从对作为子流程的管道.

Check out the pty module and try using a master/slave pair as the pipe for your subprocess.

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