无法通过asyncio使用bash命令 [英] Unable use bash commands through asyncio
问题描述
我正在尝试创建一个简单的命令,我可以不和谐地调用它,这使我可以查看目录中有多少文件,但是由于某种原因,我的代码在运行该命令后就不断遇到以下错误:
Im trying to make a simple command i can call in discord that lets me see how many files are in a directory, but for some reason my code keeps hitting the following error as soon as i run the command:
`Traceback (most recent call last):
File "/home/pi/MusicToaster/musicbot/bot.py", line 1995, in on_message
response = await handler(**handler_kwargs)
File "/home/pi/MusicToaster/musicbot/bot.py", line 1822, in cmd_audiocache
stdout=asyncio.subprocess.PIPE)
File "/usr/local/lib/python3.5/asyncio/subprocess.py", line 212, in create_subprocess_exec
stderr=stderr, **kwds)
File "/usr/local/lib/python3.5/asyncio/base_events.py", line 970, in subprocess_exec
bufsize, **kwargs)
File "/usr/local/lib/python3.5/asyncio/unix_events.py", line 184, in _make_subprocess_transport
**kwargs)
File "/usr/local/lib/python3.5/asyncio/base_subprocess.py", line 40, in __init__
stderr=stderr, bufsize=bufsize, **kwargs)
File "/usr/local/lib/python3.5/asyncio/unix_events.py", line 635, in _start
universal_newlines=False, bufsize=bufsize, **kwargs)
File "/usr/local/lib/python3.5/subprocess.py", line 950, in __init__
restore_signals, start_new_session)
File "/usr/local/lib/python3.5/subprocess.py", line 1540, in _execute_child
raise child_exception_type(errno_num, err_msg)
FileNotFoundError: [Errno 2] No such file or directory: 'find /home/pi/MusicToaster/audio_cache -type f | wc -l'`
我已经检查了我正在运行的命令,并且我无法进行接缝查找它为什么会有错误的原因,当我手动键入该命令时我没有任何问题:
Ive checked the command im running and i cant seam to find a reason as to why it would have an error, when i type it in manually i have no issue:
该值已增加,因为在我截取该屏幕快照时正在写入该文件夹的机器人正在运行
The value has increased because the bot that writes to that folder was writing was running while i was taking that screenshot
这是命令的代码:
async def cmd_audiocache(self, channel):
await self.safe_send_message(channel, "hang on ill check :thinking:")
process = await asyncio.create_subprocess_exec(
'find /home/pi/MusicToaster/audio_cache -type f | wc -l',
stdout=asyncio.subprocess.PIPE)
stdout, stderr = await process.communicate()
file_count = stdout.decode().strip()
file_count = str(file_count)
file_count = file_count + " songs stored"
await self.safe_send_message(channel, file_count)
process = await asyncio.create_subprocess_exec(
'du /home/pi/MusicToaster/audio_cache -h',
stdout=asyncio.subprocess.PIPE)
stdout, stderr = await process.communicate()
file_size = stdout.decode().strip()
file_size = str(file_size)
file_size = "all songs total to" + file_size
await self.safe_send_message(channel, file_size)
请原谅该代码的混乱之处,直到我知道它可以正常工作为止,我不会整理代码.
Please excuse the messiness of that code, i dont tidy code until i know it works.
推荐答案
请注意 create_subprocess_exec :
根据一个或多个字符串参数创建一个子进程[...],其中第一个字符串指定要执行的程序,其余字符串指定程序的参数.
Create a subprocess from one or more string arguments [...] where the first string specifies the program to execute, and the remaining strings specify the program’s arguments.
使用平台的"shell"语法从cmd [...]创建一个子进程.
Create a subprocess from cmd [...] using the platform’s "shell" syntax.
示例:
# Using exec
process = await asyncio.create_subprocess_exec('ls', '-l')
# Using shell
process = await asyncio.create_subprocess_shell('ls -l')
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