Python subprocess CalledProcessError returned non zero exit status 2

Опубликовано: 27 Декабрь 2024
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Title: Understanding and Handling subprocess.CalledProcessError in Python
Introduction:
The subprocess module in Python provides a way to spawn new processes, connect to their input/output/error pipes, and obtain their return codes. Occasionally, when using this module, you might encounter a CalledProcessError with a non-zero exit status, indicating that the called process terminated with an error. In this tutorial, we will explore the subprocess.CalledProcessError and how to handle it effectively.
What is subprocess.CalledProcessError?
CalledProcessError is an exception raised by the subprocess module when a called process returns a non-zero exit status. This typically indicates an error in the subprocess execution.
Common Causes of CalledProcessError (exit status 2):
Handling subprocess.CalledProcessError:
To handle this exception, you can use a try-except block. Let's go through an example:
Explanation:
Example Scenario:
Let's consider an example where we intentionally run a command that will result in a non-zero exit status:
In this example, attempting to list files in a non-existent directory will raise a CalledProcessError.
Conclusion:
Understanding and handling subprocess.CalledProcessError is crucial when working with the subprocess module. By implementing proper error handling, you can make your Python scripts more robust and resilient when dealing with external processes.
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