Encoding for embedding python in C++

Question

I'm trying to embed a python code in C++ and it compiles successfully but when I try to run my code, I get the following error.

File "./cppPython", line 1
SyntaxError: Non-ASCII character '\x88' in file ./cppPython on line 2, but no encoding declared; see http://www.python.org/peps/pep-0263.html for details

These are my C++ and Python codes.

CPP code

#include <Python.h>
#include <iostream>
using namespace std;
int main(int argc, char *argv[])
{ 
 FILE *fp = fopen(argv[0],"r");
 Py_SetProgramName(argv[0]); /* optional but recommended */
 Py_Initialize();
 PyRun_SimpleFileExFlags(fp,argv[0],0,NULL);
 Py_Finalize();
 return 0;
}

Python code

#!/usr/bin/env python
# -*- coding: utf-8 -*-
print "hello"

Answer 1

argv[0] gives the C++ executable name. For eg. If you named the C++ executable as abc and executed as:

./abc pythonFileName.py

Then the argv array will have argv[0] as ./abc and argv[1] as pythonFileName.py.

So, please use the index 1.

Answer 2

You're running the executable as Python code, which it is not. Verify the arguments to fopen() and PyRun_SimpleFileExFlags().

• Abhishek Arya: Hello Ignacio. Thanks for your answer. Can you please explain your answer a bit? I couldn't understand what you said.
• Ignacio Vazquez-Abrams: Do you understand what argv is?
• Abhishek Arya: This is the way I'm running my cpp code ./cppPython cppPython.py. Basically, argv is the array containing the arguments that I pass to my c++ code.
• Ignacio Vazquez-Abrams: "argv is the array containing the arguments that I pass to my c++ code" Incorrect. It is all words parsed from the command line, not just the arguments.
• Abhishek Arya: Ohh, I got it. Thanks Ignacio. Now, I call fopen like fopen(argv[1],"r") and my code works as it should. Thanks again.