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September 8, 2018 23:39
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Demonstration of Data Structures in Python
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# Python3 | |
list_obj = [0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144] | |
print("List: ", list_obj) | |
print("Element at 2nd index : ", list_obj[2]) | |
# Expected Output: 1 | |
print("From 0th index and before 5th index: ", list_obj[0:5]) | |
# Expected Output: [0, 1, 1, 2, 3] | |
print("From 3rd index and before 4th index: ", list_obj[3:4]) | |
# Expected Output: [2] | |
print("Last element of the list: ", list_obj[-1]) | |
# Expected Output: 144 | |
print("From 5th index to after 6th element from RHS: ", list_obj[5:-6]) | |
# Expected Output: [5, 8] | |
list_obj.append(233) | |
list_obj.append(377) | |
print("List after Append: ", list_obj) | |
# Excpected Output: | |
# [0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377] | |
list_obj.extend([610, 987]) | |
print("List after Extend: ", list_obj) | |
# [0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987] | |
# "Removes the last element. " | |
list_obj.pop() # 987 | |
list_obj.pop() # 610 | |
print("List after Pop: ", list_obj) | |
# "Removes the element specified with value." | |
list_obj.remove(377) | |
print("List after Remove: ", list_obj) | |
# Updated List: | |
# [1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233] | |
# Insert element to list. Takes args: index and value | |
list_obj.insert(0, 75) | |
print("List after Insert: ", list_obj) | |
list_obj.reverse() | |
print("List after Reverse: ", list_obj) | |
list_obj.sort() | |
print("List after Sort: ", list_obj) | |
print("*"*80) | |
pydict = {"name": "Eleven","age": 121, | |
"job_role": "gazing stars", | |
} | |
print("Dictionary: ", pydict) | |
pydict.update({"location": ["Moon", "Mars"]}) | |
print("Updated Dictionary: ", pydict) | |
print("Looping Dictionary: ", pydict) | |
for key, value in pydict.items(): | |
print(key, value) | |
print("Changing Values in Dictionary") | |
if 'name' in pydict.keys(): | |
pydict['name'] = "Joy" | |
print("Updated Dictionary: ", pydict) | |
print("*"*80) | |
pytuple = ("Healthy", "minds", "are", "happy", "minds") | |
print("Tuple: ", pytuple) | |
pytuple.index("happy") | |
# Expected Output: 3 | |
print("*"*80) | |
pyset = set() | |
print("Set: ", pyset) | |
pyset.add("go") | |
print("Updated Set: ", pyset) | |
pyset.add("coding") | |
print("Updated Set: ", pyset) | |
pyset.add("go") # no effect | |
print("Updated Set: ", pyset) |
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