[Linux] Python api 在打开管道时命令无法正常解析

[Gavin1937]

这里我用的 PPOCR_api.py 是基于最新 main branch 里面的 https://github.com/hiroi-sora/PaddleOCR-json/blob/c19f3a2aa4bfb7bc7c08966465ec726c661e4f18/api/python/PPOCR_api.py

Traceback (most recent call last):
  File "/mnt/c/Users/user/Dev/PaddleOCR-json/api/python/demo1.py", line 14, in <module>
    ocr = GetOcrApi(r"../../cpp/build/ppocr", ipcMode='socket')
  File "/mnt/c/Users/user/Dev/PaddleOCR-json/api/python/PPOCR_api.py", line 223, in GetOcrApi
    return PPOCR_socket(exePath, argument)
  File "/mnt/c/Users/user/Dev/PaddleOCR-json/api/python/PPOCR_api.py", line 159, in __init__
    super().__init__(exePath, argument)  # 父类构造函数
  File "/mnt/c/Users/user/Dev/PaddleOCR-json/api/python/PPOCR_api.py", line 37, in __init__
    self.ret = subprocess.Popen(  # 打开管道
  File "/usr/lib/python3.10/subprocess.py", line 971, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/usr/lib/python3.10/subprocess.py", line 1863, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: '../../cpp/build/ppocr --port=0 --addr="loopback"'

python 官方是建议用 list 来表示输入进 subprocess.Popen() 的命令的。文档

command_line = input()
/bin/vikings -input eggs.txt -output "spam spam.txt" -cmd "echo '$MONEY'"
args = shlex.split(command_line)
print(args)
['/bin/vikings', '-input', 'eggs.txt', '-output', 'spam spam.txt', '-cmd', "echo '$MONEY'"]
p = subprocess.Popen(args) # Success!

不过不同系统的shell在处理这些命令的时候也会有不同的行为。这里在 linux 里面只需要把一整串命令给拆成list就可以修复这个bug了。