Linux 如何从 Python 脚本调用可执行文件？
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How to make a call to an executable from Python script?
提问by fx.
I need to execute this script from my Python script.
我需要从我的 Python 脚本中执行这个脚本。
Is it possible? The script generate some outputs with some files being written. How do I access these files? I have tried with subprocess call function but without success.
是否可以？该脚本生成一些输出并写入一些文件。我如何访问这些文件？我曾尝试使用子进程调用函数，但没有成功。
fx@fx-ubuntu:~/Documents/projects/foo$ bin/bar -c somefile.xml -d text.txt -r aString -f anotherString >output
The application "bar" also references to some libraries, it also create the file "bar.xml" besides the output. How do I get access to these files? Just by using open()?
应用程序“bar”还引用了一些库，除了输出之外，它还创建文件“bar.xml”。如何访问这些文件？仅仅通过使用 open()？
Thank you,
谢谢，
Edit:
编辑：
The error from Python runtime is only this line.
Python 运行时的错误只是这一行。
$ python foo.py
bin/bar: bin/bar: cannot execute binary file
采纳答案by Peter Lyons
For executing the external program, do this:
要执行外部程序，请执行以下操作：
import subprocess
args = ("bin/bar", "-c", "somefile.xml", "-d", "text.txt", "-r", "aString", "-f", "anotherString")
#Or just:
#args = "bin/bar -c somefile.xml -d text.txt -r aString -f anotherString".split()
popen = subprocess.Popen(args, stdout=subprocess.PIPE)
popen.wait()
output = popen.stdout.read()
print output
And yes, assuming your bin/barprogram wrote some other assorted files to disk, you can open them as normal with open("path/to/output/file.txt"). Note that you don't need to rely on a subshell to redirect the output to a file on disk named "output" if you don't want to. I'm showing here how to directly read the output into your python program without going to disk in between.
是的，假设您的bin/bar程序将一些其他分类文件写入磁盘，您可以使用open("path/to/output/file.txt"). 请注意，如果您不想，您不需要依赖子shell 将输出重定向到磁盘上名为“output”的文件。我在这里展示了如何将输出直接读入您的 python 程序，而无需在两者之间访问磁盘。
回答by rz.
The simplest way is:
最简单的方法是：
import os
cmd = 'bin/bar --option --otheroption'
os.system(cmd) # returns the exit status
You access the files in the usual way, by using open().
您可以使用通常的方式访问文件open()。
If you need to do more complicated subprocess management then the subprocessmodule is the way to go.
如果您需要进行更复杂的子流程管理，那么子流程模块是您的最佳选择。
回答by Sumesh Chandran
For executing a unix executable file. I did the following in my Mac OSX and it worked for me:
用于执行 unix 可执行文件。我在 Mac OSX 中执行了以下操作，它对我有用：
import os
cmd = './darknet classifier predict data/baby.jpg'
so = os.popen(cmd).read()
print so
Here print sooutputs the result.
这里print so输出结果。
