In this tutorial, we will learn how to run a tcsh (Tenex C Shell) script from a Python script without causing interruptions or breaking the execution flow. This can be useful in scenarios where you need to automate tasks or run shell scripts from a Python application.
We will cover the following topics:
Let's get started.
To run a tcsh script from Python, you can use the subprocess module, which allows you to interact with the system shell. Here's a basic example of how to do this:
In the above code:
If your tcsh script requires input or if you want to capture the output, you can use the communicate method to interact with the script and obtain its output.
Here's an example of running a tcsh script with input and capturing the output:
In this code, you can pass input data to the script using the process.stdin.write method and capture the output and error using process.communicate().
By default, Python's subprocess module will wait for the tcsh script to finish execution before continuing with the Python script. However, if you want the tcsh script to run in the background without waiting for completion, you can use the nohup command to prevent interruptions. Here's an example:
Using nohup ensures that the tcsh script runs independently, and the Python script can continue its execution without waiting for the tcsh script to finish.
That's it! You've learned how to run a tcsh script from Python, handle input/output streams, and prevent interruptions. This can be especially helpful for automating tasks and managing system processes from your Python applications.
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