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Python: Convert all the characters in uppercase and lowercase and eliminate duplicate letters from a sequence

Python map: Exercise-6 with Solution

Write a Python program to convert all the characters in uppercase and lowercase and eliminate duplicate letters from a given sequence. Use map() function.

Sample Solution:

Python Code :

def change_cases(s):
  return str(s).upper(), str(s).lower()
 
chrars = {'a', 'b', 'E', 'f', 'a', 'i', 'o', 'U', 'a'}
print("Original Characters:\n",chrars)
 
result = map(change_cases, chrars)
print("\nAfter converting above characters in upper and lower cases\nand eliminating duplicate letters:")
print(set(result))

Sample Output:

Original Characters:
 {'f', 'b', 'U', 'i', 'o', 'E', 'a'}

After converting above characters in upper and lower cases
and eliminating duplicate letters:
{('U', 'u'), ('O', 'o'), ('A', 'a'), ('B', 'b'), ('F', 'f'), ('I', 'i'), ('E', 'e')}

Python Code Editor:

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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}