如何用Python脚本复现Dymola信息层的Modelica函数输入输出信息

Got it, let's keep this simple and practical. To pull input/output details of Modelica functions (like the sin function) that match exactly what's shown in Dymola's Information Layer, you'll want to use Dymola's official Python API—it's the most reliable approach. Below is a minimal, working example you can adapt:

Step 1: Setup & Minimal Script #

First, adjust the Dymola Python interface path to match your installed version. Then run this script:

import sys
# Add the path to Dymola's Python interface (update the version number as needed)
sys.path.append(r"C:\Program Files\Dymola 2024\Modelica\Library\python_interface\dymola.egg")

import dymola.dymola_interface as dymola_interface

# Start a Dymola instance
dymola = dymola_interface.DymolaInterface()

# Load the Modelica Standard Library (where most built-in functions live)
if not dymola.openModel("Modelica"):
    print("Error: Couldn't load Modelica Standard Library")
    dymola.close()
    sys.exit(1)

# Target function (use the full Modelica path—this is the core math sine function)
target_function = "Modelica.Math.sin"

# Get the full function declaration (matches what's in Dymola's Information Layer)
function_declaration = dymola.getFunctionDeclaration(target_function)
print("### Function Declaration (As shown in Dymola Info Layer):")
print(function_declaration)

# Extract input/output names directly
input_names = dymola.getInputNames(target_function)
output_names = dymola.getOutputNames(target_function)

print("\n### Extracted Inputs:")
for i, name in enumerate(input_names, 1):
    print(f"- Input {i}: {name}")

print("\n### Extracted Outputs:")
for i, name in enumerate(output_names, 1):
    print(f"- Output {i}: {name}")

# Clean up: close the Dymola instance
dymola.close()

Key Notes #

• Function Path: Make sure you use the full Modelica path of the function. For example, if you're targeting the Sine source block (not a pure function), the path would be Modelica.Math.Sources.Sine—adjust based on what you see in Dymola's Information Layer.
• Dymola Version: Update the file path in sys.path.append() to match your installed Dymola version (e.g., 2023 instead of 2024).
• Parsing the Declaration: If you need more details (like data types), you can parse the function_declaration string—since it's the exact text from Dymola's info layer, regex or string splitting will work reliably here.

内容的提问来源于stack exchange，提问作者Priyanka