Python: Map the values of a list to a dictionary using a function
Python List: Exercise - 220 with Solution
Write a Python program to map the values of a 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 map_dictionary(itr, fn):
return dict(zip(itr, map(fn, itr)))
print(map_dictionary([1, 2, 3], lambda x: x * x))
Sample Output:
{1: 1, 2: 4, 3: 9}
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Python: Tips of the Day
Returns True if the provided function returns True for every element in the list, False otherwise:
Example:
def tips_every(lst, fn=lambda x: x): return all(map(fn, lst)) print(tips_every([2, 4, 3], lambda x: x > 1)) print(tips_every([1, 2, 3]))
Output:
True True
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