Here are a few question-style titles that fit the content of your article: * How to Capture Output from a Subprocess with User Input in Python? * Getting Output from Subprocesses That Require User I

Accessing Output of a Subprocess with User Input in Python

In Python, you can utilize the subprocess module to execute external scripts. However, when calling a script that prompts for user input, obtaining its output within the calling script can be challenging. This article explores solutions to this problem.

Solution 1: Using check_output() with Input

The subprocess.check_output() function allows you to run a script and capture its output. To pass input to the script, use the input parameter:

<code class="python">import os
import subprocess

# Get script directory
script_path = os.path.join(os.getcwd(), 'a.py')

# Execute the script and capture output
output = subprocess.check_output([sys.executable, script_path],
                                input='\n'.join(['query 1', 'query 2']),
                                universal_newlines=True)</code>

Solution 2: Module Import and Function Call

An alternative approach is to import the script module and call a specific function:

<code class="python">import a

results = [a.search(query) for query in ['query 1', 'query 2']]</code>

Ensure that the imported script uses the if __name__ == "__main__": guard to prevent its code from executing on import.

Solution 3: Multiprocessing

If query processing is CPU-intensive, you can improve performance by parallelizing the execution using multiprocessing:

<code class="python">from multiprocessing import freeze_support, Pool
import a

freeze_support()
pool = Pool() # Use all available CPUs
results = pool.map(a.search, ['query 1', 'query 2'])</code>

The above is the detailed content of Here are a few question-style titles that fit the content of your article: * How to Capture Output from a Subprocess with User Input in Python? * Getting Output from Subprocesses That Require User I. For more information, please follow other related articles on the PHP Chinese website!