Initial Query

I want to call some C code from python on a linux machine. Specifically, I want to be able to run python3 -c 'import magic; print(magic.do_add(3, 4))' and have it give me the sum of these numbers. Here, do_add should be a C function that adds two integers. Please give me a complete set of instructions for how to make this run, so that when I run this code as-is it will work.

LLM Generation

Query

Output

## Prerequisites * Python 3 installed on your Linux machine * A C compiler (e.g., GCC) installed on your Linux machine * The `ctypes` library (part of the Python standard library) ## Step 1: Create the C Code First, we'll create a C file called `magic.c` with the following content:

// magic.c

int do_add(int a, int b) {
    return a + b;
}

This C function takes two integers, adds them together, and returns the result. ## Step 2: Compile the C Code Next, we'll compile the C code into a shared library using the following command:

gcc -shared -o magic.so -fPIC magic.c

This command compiles the `magic.c` file into a shared library called `magic.so`. ## Step 3: Create the Python Wrapper Now, we'll create a Python file called `magic.py` with the following content:

# magic.py

import ctypes

# Load the shared library
magic_lib = ctypes.CDLL('./magic.so')

# Define the function signature
magic_lib.do_add.argtypes = [ctypes.c_int, ctypes.c_int]
magic_lib.do_add.restype = ctypes.c_int

def do_add(a, b):
    return magic_lib.do_add(a, b)

This Python code loads the shared library, defines the function signature, and creates a Python wrapper for the `do_add` function. ## Step 4: Run the Code Finally, you can run the following command to test the code:

python3 -c 'import magic; print(magic.do_add(3, 4))'

This should output `7`, which is the sum of `3` and `4`. ## Complete Instructions To make the code run as-is, follow these steps: 1. Create a new directory for your project and navigate to it in your terminal. 2. Create a file called `magic.c` and add the C code from Step 1. 3. Compile the C code using the command from Step 2. 4. Create a file called `magic.py` and add the Python code from Step 3. 5. Run the command from Step 4 to test the code. Note: Make sure to run the commands in the same directory where you created the `magic.c` and `magic.py` files. The `./magic.so` path in the Python code assumes that the shared library is located in the same directory.

LLM Generation

Query

Now please conver this answer into a JSON array that packages it all up so I don't need to think and can just copy files to specific locations and then run things. Format your answer {"path/to/file": "contents of C file", "path/to/python_file": "contents of any necessary python file that exposes do_add", "build.sh": "contents of a bash file to build the project", ... # any other files necessary } The only thing I will do is put files in the right place and run `bash build.sh`. Do not give any explanation of the code. ONLY ANSWER WITH A SINGLE JSON OBJECT. Your answer should start

Output

{
 "magic.c": "int do_add(int a, int b) { return a + b; }",
 "magic.py": "import ctypes\nmagic_lib = ctypes.CDLL('./magic.so')\nmagic_lib.do_add.argtypes = [ctypes.c_int, ctypes.c_int]\nmagic_lib.do_add.restype = ctypes.c_int\ndef do_add(a, b):\n    return magic_lib.do_add(a, b)",
 "build.sh": "#!/bin/bash\ngcc -shared -o magic.so -fPIC magic.c\npython3 -c 'import magic; print(magic.do_add(3, 4))'",
 "test.py": "import magic\nprint(magic.do_add(3, 4))"
}

Extract Json

I extracted the following JSON from that output:

{
 "magic.c": "int do_add(int a, int b) { return a + b; }",
 "magic.py": "import ctypes\nmagic_lib = ctypes.CDLL('./magic.so')\nmagic_lib.do_add.argtypes = [ctypes.c_int, ctypes.c_int]\nmagic_lib.do_add.restype = ctypes.c_int\ndef do_add(a, b):\n    return magic_lib.do_add(a, b)",
 "build.sh": "#!/bin/bash\ngcc -shared -o magic.so -fPIC magic.c\npython3 -c 'import magic; print(magic.do_add(3, 4))'",
 "test.py": "import magic\nprint(magic.do_add(3, 4))"
}

UNKNOWN NODE TYPE:

PyFunc

final: False Traceback (most recent call last): File "<string>", line 1, in <module> ImportError: dynamic module does not define module export function (PyInit_magic) Traceback (most recent call last): File "<string>", line 1, in <module> ImportError: dynamic module does not define module export function (PyInit_magic) Resulting in output: False