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Yf @ s d Z d d l Z e j d k Z d d l Z d d l Z d d l Z d d l Z d d l Z d d l Z d d l
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This module allows you to spawn processes, connect to their
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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,
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getstatusoutput(...): Runs a command in the shell, waits for it to complete,
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Nwin32) monotonicc @ s e Z d Z d S)SubprocessErrorN)__name__
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Nc C s( | | _ | | _ | | _ | | _ d S)N)r timeoutr
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d d d d d i } g } xM | j D]? \ } } t t j | } | d k rO | j d | | qO Wx" t j D] } | j d | q W| S)znReturn a list of command-line arguments reproducing the current
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bytes_warningbquietqr -z-W)itemsgetattrrA flagsappend warnoptions)Z flag_opt_mapargsZflagZoptrV r r r _args_from_interpreter_flags s" rb r c O sS t | | = } y | j d | SWn | j | j Yn XWd QRXd S)zRun command with arguments. Wait for command to complete or
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c O sM t | | } | rI | j d } | d k r: | d } t | | d S)aO Run command with arguments. Wait for command to complete. If
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ra Nr )r# getr
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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",
... "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'
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Nc C s( | | _ | | _ | | _ | | _ d S)N)ra r r r )r ra r r r r r r r J s zCompletedProcess.__init__c C s d j | j d j | j g } | j d k rL | j d j | j | j d k rt | j d j | j d j t | j d j | S)Nz args={!r}zreturncode={!r}z stdout={!r}z stderr={!r}z{}({})z, ) formatra r r r_ r typer join)r ra r r r r; P s zCompletedProcess.__repr__c C s. | j r* t | j | j | j | j d S)z6Raise CalledProcessError if the exit code is non-zero.N)r r
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(0, '/bin/ls')
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(256, 'cat: /bin/junk: No such file or directory')
>>> subprocess.getstatusoutput('/bin/junk')
(256, 'sh: /bin/junk: not found')
shellTrk r r NrF
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c C s t | d S)a% Return output (stdout or stderr) of executing cmd in a shell.
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>>> subprocess.getoutput('ls /bin/ls')
'/bin/ls'
rF )r% )r r r r r& s
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d d Z d d d d Z d d Z d d Z d d Z e rnd d Z d d Z d! d" Z d e j e j e j d# d$ Z d d d% d& Z d' d( Z d) d* Z d+ d, Z d- d. Z e Z! n d/ d Z d0 d" Z e" j# e" j$ e" j% e" j& e" j' e" j( d1 d2 Z) d e" j* e" j+ e, j- d3 d$ Z d4 d5 Z. d d d6 d& Z d7 d* Z d8 d9 Z/ d: d, Z d; d. Z d< d= Z! d S)?r a Execute a child program in a new process.
For a complete description of the arguments see the Python documentation.
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args: A string, or a sequence of program arguments.
bufsize: supplied as the buffering argument to the open() function when
creating the stdin/stdout/stderr pipe file objects
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.
universal_newlines: If true, use universal line endings for file
objects stdin, stdout and stderr.
startupinfo and creationflags (Windows only)
restore_signals (POSIX only)
start_new_session (POSIX only)
pass_fds (POSIX only)
Attributes:
stdin, stdout, stderr, pid, returncode
FrF Nr Tc C s@ t t j | _ d | _ d | _ | d k r: d } t | t sU t d t r | d k rs t
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| } n d } z | j | | | \ } } Wd d | _ X| j d | j | } | | f S)a4 Interact with process: Send data to stdin. Read data from
stdout and stderr, until end-of-file is reached. Wait for
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child process (if self.universal_newlines is True, this should
be a string; if it is False, "input" should be bytes), or
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communicate() returns a tuple (stdout, stderr). These will be
bytes or, if self.universal_newlines was True, a string.
z.Cannot send input after starting communicationNrG Tr )
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\ } } d \ } } d \ } } | d k r t j t j } | d k rDt j d d \ } }
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zPopen.terminatec
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