- 1 year ago
How do I capture the stdin/stderr from a process that I'm spawning a windows process?
To capture the stdin/stdout/stderr from a process that you're spawning in a Windows environment, you can use the subprocess
module in Python. Here's an example:
pythonimport subprocess
# Run the command and capture stdout/stderr
command = ['your_command', 'arg1', 'arg2']
process = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
# Read stdout and stderr
stdout, stderr = process.communicate()
# Decode stdout and stderr if needed (assuming UTF-8 encoding)
stdout = stdout.decode('utf-8')
stderr = stderr.decode('utf-8')
# Print or process the captured output
print("stdout:", stdout)
print("stderr:", stderr)
In this example, replace 'your_command'
, 'arg1'
, 'arg2'
with the actual command and arguments you want to run. The subprocess.Popen
function starts the process and captures its stdout and stderr. The stdout
and stderr
arguments of Popen
are set to subprocess.PIPE
to redirect the output.
After running the process, you can use the communicate()
method to read the captured output. It returns a tuple containing the stdout and stderr as bytes. If needed, you can decode them into strings using the appropriate encoding.
You can then process, print, or save the captured output as desired.
Note that the subprocess
module provides various other options and features for working with external processes in Python. You can refer to the official Python documentation for more details on using the subprocess
module: subprocess — Subprocess management