Python Day 11
1.Average Scores
When I was in college, getting up for an 8 am Quiz was always a challenge for me, some professors had the policy take the average of a missing Quiz. Of course, Excel can do the job, since I want to be a real Data Scientist, we will learn how to find an average using Python.

Pexels / Pixabay
3 Krishna 67 68 69 Arjun 70 98 63 Malika 52 56 60 Malika
Solution:
query_scores = student_marks[query_name] #print("{0:.2f}".format(sum(query_scores)/(len(query_scores)))) print(sum(query_scores)/(len(query_scores)))
Output
Note: the regular sum will generate no decimal. “{0:.2f}”.format is for the desired decimal place.
2. Python List Tricks
We will give an exmaple for the common options in a list: insert, print, remove, append, sort, pop, reverse.
list=[1,2,3,4,5] #1. insert 4 to 1st position list.insert(1,4) print(list) [1, 4, 2, 3, 4, 5] #2. Remove: ##2a. Remove 2 list.remove(2) print(list) [1, 4, 3, 4, 5] ##2b. Remove the first element list.remove(list[0]) print(list) [4, 3, 4, 5] #3. Append: insert 8 in the end list.append(8) print(list) [4, 3, 4, 5, 3, 8] #4. Sort: Sort the list list.sort() print(list) [3, 3, 4, 4, 5, 8] #5. Pop: Pop the last element of the list list.pop() print(list) [3, 3, 4, 4, 5] #6. Reverse: Reverse the list list.reverse() print(list) [5, 4, 4, 3, 3]
Note: If we un-specify a position, pop will remove the last element.
Happy Studying! 😏
Reference:
https://www.hackerrank.com/challenges/python-lists/problem