python list directories only

#include <stdio.h>
#include <stdlib.h>
#include <dirent.h>

int main() {
    DIR *directory;
    struct dirent *entry;

    if ((directory = opendir(".")) == NULL) {
        perror("Unable to open directory");
        exit(EXIT_FAILURE);
    }

    while ((entry = readdir(directory)) != NULL) {
        printf("%s\n", entry->d_name);
    }

    closedir(directory);

    return 0;
}