Here is a list of the Hello World Programs for different languages:

C

#include <stdio.h>
int main()
{
printf("Hello World!");
}

C++

#include <iostream.h>
int main()
{
cout << "Hello World!" << endl;
}

C#

public class HelloWorld
  public static void Main()
  {
    System.Console.WriteLine("Hello World!");
  }

Java

class HelloWorld {
static void main(String[] args)
{
System.out.println("Hello World!");
}

SHELL

echo "Hello World"

Python 2

print "Hello World!\n"

Python 3

print ("Hello World!")

Ruby

puts "Hello World!"

Perl

print "Hello World!n";

PHP

  <?php      
    print "Hello World!";
  ?>

Rust

fn main() {
    println("Hello World!");
}

This is the simplest form of Hello World for most of these languages.

Tags: C, Java, perl, PHP, Programming, Python, Ruby, Shell

So I was figuring out how to parse command line arguments with python and using the getopt module with the following code

#!/usr/bin/env python
import sys
import getopt

def main(argv):
   infile = "some.xml"
   try:
      opts,args = getopt.getopt(argv,"hi:d",["help","infile="]
   except getopt.GetoptError:
      usage()
      sys.exit(2)

if __name__ == "__main__":
    main(sys.argv[1:])

And I was getting the following error:

AttributeError: ‘getopt’ module has no attribute ‘GetoptError’

So my first problem was that I had named my script getopt.py and after renaming the script, I got the same error. Well you now need to remove the getopt.pyc file that was generated from your earlier running of the poorly named script.