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Python: Get the two largest and three smallest items from a dataset

Python heap queue algorithm: Exercise-25 with Solution

Write a Python program to get the two largest and three smallest items from a dataset.

Sample Solution:

Python Code:

import heapq
h = [10, 20, 50, 70, 90, 20, 50, 40, 60, 80, 100]
print(heapq.nlargest(2,h))
print(heapq.nsmallest(3,h))

Sample Output:

[100, 90]
[10, 20, 20]

Flowchart:

Python heap queue algorithm: Get the two largest and three smallest items from a dataset.

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Python Code Editor:

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Previous: Write a Python program to create a heapsort, pushing all values onto a heap and then popping off the smallest values one at a time.
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Python: Tips of the Day

Creates a dictionary with the same keys as the provided dictionary and values generated by running the provided function for each value:

Example:

def tips_map_values(obj, fn):
  ret = {}
  for key in obj.keys():
    ret[key] = fn(obj[key])
  return ret
users = {
  'Owen': { 'user': 'Owen', 'age': 29 },
  'Eddie': { 'user': 'Eddie', 'age': 15 }
}

print(tips_map_values(users, lambda u : u['age'])) # {'Owen': 29, 'Eddie': 15}

Output:

{'Owen': 29, 'Eddie': 15}