30-seconds-of-code/snippets/map_dictionary.md

title, tags

title	tags
map_dictionary	list,intermediate

Maps 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.

def map_dictionary(itr, fn):
  return dict(zip(itr, map(fn, itr)))

map_dictionary([1,2,3], lambda x: x * x) # { 1: 1, 2: 4, 3: 9 }