Match Case Super Powers - Python

HOLA

Welcome to Python Unleash'd 03

This is same as Switch Case, just Switch is replaced with Match, but with new super powers added.

It was introduced in Python 3.10.

It is similar to if-else block. When you do not want to extend if-else in multiple chain, use MATCH CASE

IMPORTANT POINTS TO REMEMBER

• MATCH case differs from our classic switch not just because python and C++ are two programming langs but in python it has got some new powers as mentioned above

• We do not have 'default' instead we have '_' for default case in the end

• cases need not to be same data type, this is possible in C++ too btw, in the code below, we are able to implement OR in C++ switch statement indirectly, we are not actually using OR keyword but bringing its implementation. Also we are changing the type of case statement here. We can do same in python also.

We can ofcourse not put array here in cases since it already convert string/char to int when we give char/string value to menuChoice. I am figuring out how it will look if I have to work with array in switch statement, lets see this first.

   int menuChoice = 1;
   switch(menuChoice) {
    case 'q':
    case 'Q':
        //Some code
        break;
    case 1:
    case 'S':
        cout<<"s for snake";
        break;
    default:
          cout<<"invalid";
 }

Found this link interesting for arrays in C++

BASIC MATCH CASE EXAMPLE PYTHON

sample_var = "string"

match sample_var:
      case "string":
          print("string here")

      case 5:
          print("five")

      case _:
          print("default")

I am missing chatgpt here

Switch case with OR in PYTHON

'|' is used for OR

sample_var = "string_second"

match sample_var:
      case "string":
          print("string here")

      case 5 | "string_second":  
          print("five")

      case _:
          print("default")

NOW I AM JUST PLAYING WITH THIS CODE AND EXPLORING NEW THINGS

So here is another example, we are using if with MATCH CASE

sample_var = "lara"
list1 = ["ramesh", "suresh"]
name = "ramesh"

match sample_var:

      case "lara" if name in list1:
          print("lara has access to DB")

      case "string":
          print("string here")

      case 5 | "string_second":
          print("five")

      case _:
          print("default")

Looks interesting! right?

We can match dictionary, class even patterns, find more about this here

Thanks for reading!