I wanted to add in some of the things that I learned while doing some more hacker rank with Python.

As with many things in Python you can iterate over anything that is iterate-able. I was trying to find the average score of a dict that had a list of scores {name: list_of_scores, ...}

I was able to simply do :

for score in student_marks[query_name]:
        total += score

You are taking the entry with the name you want and then iterating over the scores.

Next I wanted to find the runner up score from a list. I was able to sort the list and then pull the first value list[0] and then test for if the value is not equal to the top then break
for score in sorted_list:
        if score != top:
            print(score)
            break
Next I needed to print the list of points on a 3d plane that fall in a range and don't sum to a specific value. I used a nested for loop to take care of this. 
string = "["
    first = True
    
    for i in range(x + 1):
        for j in range(y + 1):
            for k in range(z + 1):
                if i + j + k != n:
                    if not first:
                        string += ", "
                    string += f"[{i}, {j}, {k}]"
                    first = False
                    
        
    string += "]"

Next I needed to print the second lowest scores from a list of names and scores. We already found out how to sort a list based off to factors before but Ill put the code here as well

 sorted_by_score = sorted(name_score, key=lambda x: (x[1], x[0]))

Once we have that list sorted I was able to find the second lowest I used a for loop to do this as there might me ties for the lowest score. Then I ran an other loop to only print the names for the scores that are the lowest.

name, lowest = sorted_by_score[0]
    # print(name, lowest)
    
    for name, score in sorted_by_score:
        # print(name, score)
        if score != lowest:
            second = score
            break
    # print(second)
    
    for name, score in sorted_by_score:
        # print(name, score)
        if score == second:
            print(name)
        if score != second and score != lowest:
            break

Lastly I wanted to parse the information from an XML sheet. There was already some code to get the tree for all the XML data. With that I was able to start to parse the data with this.

def get_attr_number(node):
    total = len(node.attrib)
    for tag in node:
        # print(tag.attrib)
        total += get_attr_number(tag)
        
    return total