Merge pull request #10 from Code-by-practice/develop

feat(examples): data structure list

Author: hegdeashwin

codes/session_3/ds_list.py

@@ -0,0 +1,46 @@
+# Open terminal > python3 ds_list.py (Data Structure)
+# Start typing below commands and see the output
+
+birds = ['Owl', 'Macaw', 'Parrot', 'BeeHumming']
+
+# Return the number of x appears in the list
+print('\nCount: ' + str(birds.count('Macaw')))
+
+# Return zero-based index in the list, Raises a ValueError if no item exist
+print('\nIndex: ' + str(birds.index('Parrot')))
+
+# Reverse the elements of the list in place
+print('\nReverse: ')
+birds.reverse()
+print(birds)
+
+# Sort
+print('\nSort: ')
+birds.sort()
+print(birds)
+
+# Append
+print('\nAppend Penguin')
+birds.append('Penguin')
+print(birds)
+
+# Insert
+print('\nInsert Kingfisher on index 3')
+birds.insert(3, 'Kingfisher')
+print(birds)
+
+# Pop
+print('\nPop bird on index 3')
+birds.pop(3)
+print(birds)
+
+# Remove
+print('\nRemove bird Penguin')
+birds.remove('Penguin')
+print(birds)
+
+# clear
+print('\nClear birds list')
+birds.clear()
+print(birds)
+

codes/session_3/ds_list_as_queue.py

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+# Open terminal > python3 ds_list_as_stack.py (Data Structure)
+# Start typing below commands and see the output
+
+# Stack:
+# First-in First-out
+
+# Import collection.deque
+from collections import deque
+
+queue = deque(['Owl', 'Macaw', 'Parrot', 'BeeHumming'])
+
+# First-in
+print('\nFirst-in: ')
+queue.append('Kingfisher')
+queue.append('Penguin')
+print(queue)
+
+print('\nFirst-out: ')
+print(queue.popleft()) # Owl
+print(queue.popleft()) # Macaw
+print(queue)

codes/session_3/ds_list_as_stack.py

@@ -0,0 +1,19 @@
+# Open terminal > python3 ds_list_as_stack.py (Data Structure)
+# Start typing below commands and see the output
+
+# Stack:
+# Last-in First-out
+
+birds = ['Owl', 'Macaw', 'Parrot', 'BeeHumming'] 
+
+# Append to stack i.e. Last-In
+print('Append to stack i.e. Last-In: ')
+birds.append('Panguin')
+birds.append('Kingfisher')
+print(birds)
+
+# Pop from the stack i.e. First-out
+print('Pop from the stack i.e. First-out: ')
+birds.pop()
+birds.pop()
+print(birds)