Python capture Popen stdout AND display on console
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Certainly! In Python, the subprocess module provides the Popen class, which allows you to spawn new processes, connect to their input/output/error pipes, and obtain their return codes. If you want to capture the standard output (stdout) of a process while still displaying it on the console, you can use the subprocess.PIPE option and the communicate() method. Here's a tutorial with a code example:
In this example, the subprocess.Popen function is used to start a new process with the specified command and arguments. The stdout=subprocess.PIPE argument captures the standard output of the process, allowing you to read it later.
The communicate() method is not used in this case because we want to display the output as soon as it becomes available rather than waiting for the process to complete. Instead, we use a loop with iter(stdout.readline, '') to read lines from the standard output as they are produced.
The universal_newlines=True argument ensures that the output is decoded as text.
Feel free to replace the command_to_run variable with the command and arguments you want to execute. This example uses the ls -l command to list files in the current directory as a demonstration.
Remember to handle exceptions appropriately in your actual code to account for errors that may occur during the process execution.
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