How to write a Python stored procedure in directly Snowflake (using Snowpark)

Using the Snowpark feature of Snowflakes you can write stored procedure in Python. The following is a very simple example of a procedure defined directly in the workspace screen of Snowflake.

CREATE OR REPLACE PROCEDURE reverse_string(INPUT_STR STRING)
  RETURNS STRING
  LANGUAGE PYTHON
  RUNTIME_VERSION = '3.8'
  PACKAGES = ('snowflake-snowpark-python')
  HANDLER = 'reverse_str'
AS
$$
def reverse_str(session,INPUT_STR):
  inv=INPUT_STR[::-1]
  return inv
$$;

CALL reverse_string('ABC');