问题描述
我正在尝试从 python 运行 gphoto2，但是没有成功.它只是返回未找到的命令.gphoto 已正确安装，如终端中的命令可以正常工作.
I am trying to run gphoto2 from python but, with no succes. It just returns command not found. gphoto is installed correctly, as in, the commands work fine in Terminal.
p = subprocess.Popen(['gphoto2'], shell=True, stdout=subprocess.PIPE,
stderr=subprocess.STDOUT, executable='/bin/bash')
for line in p.stdout.readlines():
print line
p.wait()
/bin/bash: gphoto2: command not found
我知道 osx 终端(应用程序)有一些有趣的地方，但是我对 osx 的了解很少.
I know that there is something funny about the osx Terminal (app) but, my knowledge on osx is meager.
对这个有什么想法吗?
编辑
更改了我的一些代码，出现其他错误
changed some of my code, other errors appear
p = subprocess.Popen(['gphoto2'], stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
for line in p.stdout:
print line
raise child_exception
OSError: [Errno 2] No such file or directory
编辑
使用完整路径'/opt/local/bin/gphoto2'
using full path '/opt/local/bin/gphoto2'
但是如果有人愿意解释使用哪个 shell 或如何登录并能够拥有相同的功能..?
but if someone care to explain which shell to use or how to log in and be able to have the same functionality..?
推荐答案
使用shell = True时，subprocess.Popen的第一个参数应该是字符串，而不是一个列表:
When using shell = True, the first argument to subprocess.Popen should be a string, not a list:
p = subprocess.Popen('gphoto2', shell=True, ...)
但是，如果可能，应避免使用 shell = True，因为它可能是 安全风险(参见警告).
However, using shell = True should be avoided if possible since it can be a security risk (see the Warning).
所以改用
p = subprocess.Popen(['gphoto2'], ...)
(当shell = False，或者省略shell参数时，第一个参数应该是一个列表.)
(When shell = False, or if the shell parameter is omitted, the first argument should be a list.)
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