Python Tricks

Question 1

Generating Alphabet mapped to idx

Answer 1

alpha_map = { chr( i + 65 ) : i+1 for i in range(26)}

Question 2

Priority Queues or Heap Queue

Answer 2

heapq.xxxx

Question 3

Creating a counter or dictionary with frequency

Answer 3

c = counter(list)

c = {}
for item in list:
   if item not in list:
      c[item] = 0
   c[item] += 1

Question 4

Creating a dictionary with list that last occurrence

Answer 4

indexDict = {item : idx for idx, item in enumerate(list)}