Using Python to run a .exe file and provide a string as an input for the program

import subprocess

# Path to your .exe file
exe_path = 'path/to/your/program.exe'

# String to be provided as input
input_string = 'Your input string here'

# Run the .exe file and provide input
try:
    # Use subprocess.run for Python 3.5 and newer
    result = subprocess.run([exe_path], input=input_string.encode(), text=True, capture_output=True, check=True)

    # Access the output of the program if needed
    output = result.stdout
    print("Program output:", output)

except subprocess.CalledProcessError as e:
    # Handle errors, if any
    print(f"Error: {e}")

Explanation:

1. subprocess.run: Executes the specified command.
2. input: Specifies the input to be provided to the process. In this example, input_string.encode() converts the string to bytes, which is the expected input format.
3. text=True: Treats the input and output as text.
4. capture_output=True: Captures the standard output of the subprocess.
5. check=True: Raises a subprocess.CalledProcessError if the subprocess returns a non-zero exit code, allowing you to handle errors.

Adjust the exe_path variable to the actual path of your .exe file and modify the input_string accordingly. Note that this example assumes the external program reads input from the standard input stream (stdin). If the program expects input in a different way, you may need to adjust the code accordingly.