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  1. Prepare
  2. Python
  3. Basic Data Types
  4. Nested Lists
  5. Discussions

Nested Lists

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  • aa3377
     + 0 comments
    if __name__ == '__main__':
    a=[]
    b=[]
    for i in range(int(input())):
        name = input()
        score = float(input())
        a.append([name,score])
        b.append(a[i][1])
    b.sort()
    b=set(b)
    c=list(b)
    d=[]
    for i in range(len(a)):
        if c[1]==a[i][1]:
            d.append(a[i][0])
    d.sort()
    for i in range(len(d)):  
        print(d[i])

  • a_harshadayini
     + 0 comments

    if name == 'main': result=list() marks=list() for _ in range(int(input())): name = input() score = float(input()) result.append([name,score]) #nested list marks.append(score)

    marks=sorted(set(marks)) second_lowest = marks[1]

    names=[val[0] for val in result if second_lowest==val[1] ] (or)

    names=[name for name,score in result if second_lowest==score ] names.sort() for i in names: print(i)

  • billion_mockup
     + 0 comments
    if __name__ == '__main__':
    a=[ ]
    list_score=[ ]
    list_score2=[ ]
    list_sec_low=[ ]
    for _ in range(int(input())):
        name = input()
        score = float(input())
        x=[name,score]
        a.append(x)
        list_score.append(score)
    list_score.sort``()
    e=min(list_score)
    for i in list_score:
        if i != e:
            list_score2.append(i)
    for c in a:
        if c[1]==min(list_score2):
            list_sec_low.append(c[0])
    list_sec_low.sort()
    for d in list_sec_low:
        print(d)

  • rohangodge123
     + 0 comments
    if __name__ == '__main__':
students = []
marksList = []
for _ in range(int(input())):
    name = input()
    marks = float(input())

    students.append([name, marks])
    marksList.append(marks)

secondLowestScore = sorted(set(marksList))[1]

x = [sname for sname, marks in students if marks == secondLowestScore]

for _ in sorted(x):
    print(_)

  • chaz4
     + 1 comment

    With comments for clarity

    grades = []
answer = []
#add a line in the given loop to add 
#names and scores to a NESTED LIST
for _ in range(int(input())):
    name = input()
    score = float(input())
    grades.append([name, score])

#sort the nested list by scores,
#then by name (in case of a tie)
grades.sort(key = lambda l: (l[1], l[0]))

#make a SET of just the scores to
#remove repeat values (so we will
#know which score is 2nd lowest)
gradeset = set(grades[i][1] for i in range(len(grades)))

#convert the above set into a list
#so we can iterate through it
uniquelist = list(gradeset)

#iterate through the nested list
#if the grade in the list is equal
#to the second score in the unique
#list, add that person's name to
#the final answer list
for j in range(len(grades)):
    if grades[j][1] == uniquelist[1]:
        answer.append(grades[j][0])

#print the names you got from the
#above step, each one on a new line
for x in answer:
    print(x)
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