Python is now the most popular introductory language at top U.S. universities(cacm.acm.org)

    word_list = ["hat", "dog", "cat"]
    for word in word_list:
        print(word)

    String[] word_list = {"hat", "dog", "cat"}
    for(int i=0; i < word_list.length; i++){
        System.out.println(word_list[i]);
    }

    String[] word_list = {"hat", "dog", "cat"}
    for(String word: wordlist){
        System.out.println(word);
    }

    mkdir cgi-bin
    cat <<'eof' > cgi-bin/hello.py
    #!/usr/bin/env python3
    print("Content-type: text/plain")
    print()
    print("Hello, world")
    eof
    
    #try to run:
    ./cgi-bin/hello.py
    bash: ./cgi-bin/hello.py: Permission denied
    #fix error:
    chmod u+x ./cgi-bin/hello.py
    #test in console:
    ./cgi-bin/hello.py
    Content-type: text/plain

    Hello, world
    #Ok, does it work on the web?
    python3.4 -m http.server --cgi 8000 --bind 127.0.0.1

    #open localhost:8000/cgi-bin/hello.py

    return "Hello World!"

    app.run()