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Python: Iterate over elements repeating each as many times as its count

Python Collections: Exercise-1 with Solution

Write a Python program that iterate over elements repeating each as many times as its count.

Note: Elements are returned in arbitrary order.

Sample Solution:

Python Code:

from collections import Counter
c = Counter(p=4, q=2, r=0, s=-2)
print(list(c.elements()))

Sample Output:

['p', 'p', 'p', 'p', 'q', 'q']

Flowchart:

Python Collections: Iterate over elements repeating each as many times as its count.

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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}