printf() style output through python's logger in python c extension

logger.c

// logger.c - hook into python's logging module

#include <Python.h>
#include <stdarg.h>
#include "logger.h"

static PyObject *logger;

// logger = logging.getLogger('libvncdriver')
int logger_init(void) {
  PyObject *logging_module = NULL;

  // First-time import the logging module, or throw an exception trying
  if (NULL == logger) {
    logging_module = PyImport_ImportModuleNoBlock("logging");
    if (NULL == logging_module) {
      PyErr_SetString(PyExc_ImportError, "Failed to import 'logging' module");
      return -1;
    }
  }

  // logging.basicConfig()
  PyObject_CallMethod(logging_module, "basicConfig", NULL);
  // logger = logging.getLogger('libvncdriver')
  logger = PyObject_CallMethod(logging_module, "getLogger", "s", "libvncdriver");
  // logger.setLevel(INFO)
  PyObject_CallMethod(logger, "setLevel", "i", INFO);

  return 0;
}

void logger_str(logging_level_e level, const char *format, ...) {
  char buf[1024];  // Should be enough for anybody...
  va_list(args);
  va_start(args, format);
  vsnprintf(buf, sizeof(buf), format, args);
  va_end(args);
  PyObject_CallMethod(logger, "log", "is", level, buf);
}

logger.h

// logger.h - hook into python's logging module

#include <stdarg.h>

// https://docs.python.org/2.7/library/logging.html#logging-levels
typedef enum {
  NOTSET = 0,
  DEBUG = 10,
  INFO = 20,
  WARNING = 30,
  ERROR = 40,
  CRITICAL = 50,
} logging_level_e;

// Call once to initialize and setup logging
// Returns negative on failure
int logger_init(void);

// Use the "logging" python module to log a string (printf-style)
void logger_str(logging_level_e level, const char *format, ...);