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Python: Map dictionary

Python dictionary: Exercise-70 with Solution

Write a Python program to map the values of a given list to a dictionary using a function, where the key-value pairs consist of the original value as the key and the result of the function as the value.

  • Use map() to apply fn to each value of the list.
  • Use zip() to pair original values to the values produced by fn.
  • Use dict() to return an appropriate dictionary.

Sample Solution:

Python Code:

def test(itr, fn):
  return dict(zip(itr, map(fn, itr)))
print(test([1, 2, 3, 4], lambda x: x * x))

Sample Output: 

{1: 1, 2: 4, 3: 9, 4: 16}

Flowchart:

Flowchart: Map dictionary.

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Python: Tips of the Day

Decapitalizes the first letter of a string:

Example:

def tips_decapitalize(s, upper_rest=False):
  return s[:1].lower() + (s[1:].upper() if upper_rest else s[1:])
print(tips_decapitalize('PythonTips'))
print(tips_decapitalize('PythonTips', True))

Output:

pythonTips
pYTHONTIPS