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Main API
========
run(...): Runs a command, waits for it to complete, then returns a
CompletedProcess instance.
Popen(...): A class for flexibly executing a command in a new process
Constants
---------
DEVNULL: Special value that indicates that os.devnull should be used
PIPE: Special value that indicates a pipe should be created
STDOUT: Special value that indicates that stderr should go to stdout
Older API
=========
call(...): Runs a command, waits for it to complete, then returns
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check_call(...): Same as call() but raises CalledProcessError()
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check_output(...): Same as check_call() but returns the contents of
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getoutput(...): Runs a command in the shell, waits for it to complete,
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b'crw-rw-rw- 1 root root 1, 3 Oct 18 2007 /dev/null\n'
The stdout argument is not allowed as it is used internally.
To capture standard error in the result, use stderr=STDOUT.
>>> check_output(["/bin/sh", "-c",
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... stderr=STDOUT)
b'ls: non_existent_file: No such file or directory\n'
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>>> check_output(["sed", "-e", "s/foo/bar/"],
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If timeout is given, and the process takes too long, a TimeoutExpired
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it will be used internally.
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contained within. A quoted string can be embedded in an
argument.
3) A double quotation mark preceded by a backslash is
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4) Backslashes are interpreted literally, unless they
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5) If backslashes immediately precede a double quotation mark,
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The exit status for the command can be interpreted
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>>> subprocess.getstatusoutput('ls /bin/ls')
(0, '/bin/ls')
>>> subprocess.getstatusoutput('cat /bin/junk')
(1, 'cat: /bin/junk: No such file or directory')
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executable: A replacement program to execute.
stdin, stdout and stderr: These specify the executed programs' standard
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preexec_fn: (POSIX only) An object to be called in the child process
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close_fds: Controls closing or inheriting of file descriptors.
shell: If true, the command will be executed through the shell.
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startupinfo and creationflags (Windows only)
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encoding and errors: Text mode encoding and error handling to use for
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