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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
the return code.
check_call(...): Same as call() but raises CalledProcessError()
if return code is not 0
check_output(...): Same as check_call() but returns the contents of
stdout instead of a return code
getoutput(...): Runs a command in the shell, waits for it to complete,
then returns the output
getstatusoutput(...): Runs a command in the shell, waits for it to complete,
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:%z 3 yy!!##r- rN c t |i |5 } |j | cddd S # |j xY w# 1 sw Y yxY w)zRun command with arguments. Wait for command to complete or
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)r r retcoder3 s r. r r sB I((Gjj ;A,C #.. r- c dD ] }||v st | d d|v rS|d N|j d s3|j d s"|j d s|j d rd}nd }||d< t |t | d
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>>> check_output(["ls", "-l", "/dev/null"])
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",
... "ls -l non_existent_file ; exit 0"],
... stderr=STDOUT)
b'ls: non_existent_file: No such file or directory\n'
There is an additional optional argument, "input", allowing you to
pass a string to the subprocess's stdin. If you use this argument
you may not also use the Popen constructor's "stdin" argument, as
it too will be used internally. Example:
>>> check_output(["sed", "-e", "s/foo/bar/"],
... input=b"when in the course of fooman events\n")
b'when in the course of barman events\n'
By default, all communication is in bytes, and therefore any "input"
should be bytes, and the return value will be bytes. If in text mode,
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returncode: The exit code of the process, negative for signals.
stdout: The standard output (None if not captured).
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Nc < || _ || _ || _ || _ y r1 )r r2 rB r5 )r6 r r2 rB r5 s r. r7 zCompletedProcess.__init__ s $ r- c dj | j dj | j g}| j *|j dj | j | j
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or pass capture_output=True to capture both.
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CalledProcessError. The CalledProcessError object will have the return code
in the returncode attribute, and output & stderr attributes if those streams
were captured.
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you may not also use the Popen constructor's "stdin" argument, as
it will be used internally.
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be bytes, and the stdout and stderr will be bytes. If in text mode, any
"input" should be a string, and stdout and stderr will be strings decoded
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Nstdinz/stdin and input arguments may not both be used.rB r5 z@stdout and stderr arguments may not be used with capture_output.r r4 r5 )r r= r r communicater r
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Translate a sequence of arguments into a command line
string, using the same rules as the MS C runtime:
1) Arguments are delimited by white space, which is either a
space or a tab.
2) A string surrounded by double quotation marks is
interpreted as a single argument, regardless of white space
contained within. A quoted string can be embedded in an
argument.
3) A double quotation mark preceded by a backslash is
interpreted as a literal double quotation mark.
4) Backslashes are interpreted literally, unless they
immediately precede a double quotation mark.
5) If backslashes immediately precede a double quotation mark,
every pair of backslashes is interpreted as a literal
backslash. If the number of backslashes is odd, the last
backslash escapes the next double quotation mark as
described in rule 3.
F "\r z\"r )maposfsdecoder lenr r )seqresult needquoter bs_bufcs r. list2cmdliner @ s < FI2;;$ MM# CZ>> import subprocess
>>> subprocess.getstatusoutput('ls /bin/ls')
(0, '/bin/ls')
>>> subprocess.getstatusoutput('cat /bin/junk')
(1, 'cat: /bin/junk: No such file or directory')
>>> subprocess.getstatusoutput('/bin/junk')
(127, 'sh: /bin/junk: not found')
>>> subprocess.getstatusoutput('/bin/kill $$')
(-15, '')
T)shellr r5 r r r Nr|
)r r r
r4 r2 )r3 r r dataexitcodeexs r. r r sl *!Ct$v%-f> BCyDCRy T> !yy==!s * AAAc $ t | || d S )a% Return output (stdout or stderr) of executing cmd in a shell.
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value is a string containing the command's output. Example:
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>>> subprocess.getoutput('ls /bin/ls')
'/bin/ls'
r r )r )r3 r r s r. r
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subprocess requires a posix_spawn() implementation that properly reports
errors to the parent process, & sets errno on the following failures:
* Process attribute actions failed.
* File actions failed.
* exec() failed.
Prefer an implementation which can use vfork() in some cases for best
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posix_spawnF)darwinsunos5TCS_GNU_LIBC_VERSIONr )maxsplitr r r: linuxglibc)r )r hasattrr rw platformconfstrsplitr r= tupler rg AttributeErrorOSError)verpartslibcversions r. _use_posix_spawnr s ]3
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executable: A replacement program to execute.
stdin, stdout and stderr: These specify the executed programs' standard
input, standard output and standard error file handles, respectively.
preexec_fn: (POSIX only) An object to be called in the child process
just before the child is executed.
close_fds: Controls closing or inheriting of file descriptors.
shell: If true, the command will be executed through the shell.
cwd: Sets the current directory before the child is executed.
env: Defines the environment variables for the new process.
text: If true, decode stdin, stdout and stderr using the given encoding
(if set) or the system default otherwise.
universal_newlines: Alias of text, provided for backwards compatibility.
startupinfo and creationflags (Windows only)
restore_signals (POSIX only)
start_new_session (POSIX only)
process_group (POSIX only)
group (POSIX only)
extra_groups (POSIX only)
user (POSIX only)
umask (POSIX only)
pass_fds (POSIX only)
encoding and errors: Text mode encoding and error handling to use for
file objects stdin, stdout and stderr.
Attributes:
stdin, stdout, stderr, pid, returncode
Fr| N) usergroup extra_groupsr r r umaskpipesize
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|| |#|$|%|&|'|(|| | |!||| y# tN $ r t! d w xY w# tN $ r t! d w xY w# tN $ r t! d w xY w# tq d| j* | j, | j. f D ]" }) |)js # t $ r Y w xY w | jD sg }*|tt k( r|*jY |# |tt k( r|*jY |& |tt k( r|*jY |( tG | d# r|*jY | jv |*D ]N }+ t r!t |+tx r|+j{ ntI jr |+ A# t $ r Y Lw xY w xY w)$zCreate new Popen instance.z does not support processes.NFr| zbufsize must be an integerzpipesize must be an integerz0preexec_fn is not supported on Windows platformsz pass_fds overriding close_fds.Tz2startupinfo is only supported on Windows platformsr z4creationflags is only supported on Windows platformszlCannot disambiguate when both text and universal_newlines are supplied but different. Pass one or the other.g ?r setregidz>The 'group' parameter is not supported on the current platformzHThe group parameter cannot be a string on systems without the grp modulez,Group must be a string or an integer, not {}z!Group ID cannot be negative, got setgroupszEThe 'extra_groups' parameter is not supported on the current platformz#Groups must be a list, not a stringzIItems in extra_groups cannot be strings on systems without the grp modulez9Items in extra_groups must be a string or integer, not {}setreuidz=The 'user' parameter is not supported on the current platformzGThe user parameter cannot be a string on systems without the pwd modulez#User must be a string or an integerz User ID cannot be negative, got wb)
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