feat(examples): function and arguments

Author: ashegde

codes/session_2/default.py

@@ -0,0 +1,31 @@
+# Open terminal > python3 default.py
+# Start typing below commands and see the output
+
+# Function with default values for arguments, and while loop examples
+# Note: The default value is evaluated only once.
+
+def askme(prompt, retries=3, reminder='Invalid response, please try again!'):
+  while True:
+    ok = input(prompt)
+
+    if ok in ('y', 'yes'):
+      return True
+    
+    if ok in ('n', 'no'):
+      return False
+    
+    retries = retries - 1
+
+    if retries < 0:
+      raise ValueError('System is auto locked!')
+
+    print(reminder)
+
+askme('Are you sure you want to quit? ')
+
+
+# Annotations example
+def hello(name: str) -> str:
+  print('Annotations: ', hello.__annotations__)
+
+hello('Ashwin')