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- #GET DATA RETURN FROM PYTHON SUBPROCESS CALL HOW TO#
- #GET DATA RETURN FROM PYTHON SUBPROCESS CALL FULL#
- #GET DATA RETURN FROM PYTHON SUBPROCESS CALL CODE#
# NOTE: We intentionally exclude list2cmdline as it is "SubprocessError", "TimeoutExpired", "CompletedProcess"]
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"getoutput", "check_output", "run", "CalledProcessError", "DEVNULL", _all_ = [ "Popen", "PIPE", "STDOUT", "call", "check_call", "getstatusoutput", Getstatusoutput(.): Runs a command in the shell, waits for it to complete, Getoutput(.): Runs a command in the shell, waits for it to complete,
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STDOUT: Special value that indicates that stderr should go to stdoutĬall(.): Runs a command, waits for it to complete, then returnsĬheck_call(.): Same as call() but raises CalledProcessError()Ĭheck_output(.): Same as check_call() but returns the contents of PIPE: Special value that indicates a pipe should be created Popen(.): A class for flexibly executing a command in a new processĭEVNULL: Special value that indicates that os.devnull should be used Run(.): Runs a command, waits for it to complete, then returns a Input/output/error pipes, and obtain their return codes.įor a complete description of this module see the Python documentation. This module allows you to spawn processes, connect to their R"""Subprocesses with accessible I/O streams # Licensed to PSF under a Contributor Agreement. # Copyright (c) 2003-2005 by Peter Astrand # For more information about this module, see PEP 324.
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# subprocess - Subprocesses with accessible I/O streams The command below will output the contents of a “data.txt” file, assuming that it contains a “name=John” string._fork_exec Function SubprocessError Class CalledProcessError Class _init_ Function _str_ Function stdout Function stdout Function TimeoutExpired Class _init_ Function _str_ Function stdout Function stdout Function STARTUPINFO Class _init_ Function copy Function Handle Class Close Function Detach Function _repr_ Function _cleanup Function _cleanup Function _optim_args_from_interpreter_flags Function _args_from_interpreter_flags Function call Function check_call Function check_output Function CompletedProcess Class _init_ Function _repr_ Function check_returncode Function run Function list2cmdline Function getstatusoutput Function getoutput Function _use_posix_spawn Function Popen Class _init_ Function _repr_ Function universal_newlines Function universal_newlines Function _translate_newlines Function _enter_ Function _exit_ Function _del_ Function _get_devnull Function _stdin_write Function communicate Function poll Function _remaining_time Function _check_timeout Function wait Function _close_pipe_fds Function _get_handles Function _make_inheritable Function _filter_handle_list Function _execute_child Function _internal_poll Function _wait Function _readerthread Function _communicate Function send_signal Function terminate Function _get_handles Function _posix_spawn Function _execute_child Function _handle_exitstatus Function _internal_poll Function _try_wait Function _wait Function _communicate Function _save_input Function send_signal Function terminate Function kill Function Example 1: Output Contents of A Text File Using the n Method
#GET DATA RETURN FROM PYTHON SUBPROCESS CALL CODE#
Any non-zero return code (exit code) would mean error with the command executed in the n method. Stdout refers to the data stream produced by the command, while stderr refers to any errors raised during execution of the program. The “CompletedProcess” object returns stdout, stderr, original arguments used while calling the method, and a return code. When the method is called, it executes the command and waits for the process to finish, returning a “CompletedProcess” object in the end. All code samples in the article are tested with Python 3.8.2 on Ubuntu 20.04.
#GET DATA RETURN FROM PYTHON SUBPROCESS CALL HOW TO#
This article will explain how to use the subprocess module and its run method in Python apps.
#GET DATA RETURN FROM PYTHON SUBPROCESS CALL FULL#
You can also supply a full path to an executable binary and use any command-line switches associated with the binary. In simpler terms, you can use it to run shell commands and run executable binaries usually scattered in various “bin” folders across a Linux file system. Subprocess is a built-in Python module that can be used to create new processes and interact with their input and output data streams.