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+--- Thread: How to find the second lowest element in the list? (/thread-37358.html)
How to find the second lowest element in the list? - Anonymous - May-31-2022
I have a list of students and I have to print the names of students who have scored second lowest.
students = [['Harry', 37.21], ['Berry', 37.21], ['Tina', 37.2], ['Akriti', 41], ['Harsh', 39]]
The lowest grade of belongs to Tina. The second lowest grade of belongs to both Harry and Berry, so we order their names alphabetically and print each name on a new line.
I am extremely new to python so I have coded as below -
studList = [] for i in range(int(input())): name = input() score = float(input()) studList.append([name,score]) studList = sorted(studList, key = lambda x: x[1], reverse = True) print(studList)I have done till the point that I now have a sorted list but now I am not sure I do I extract the second lowest scorer's names.
RE: How to find the second lowest element in the list? - DeaD_EyE - May-31-2022
- use operator.itemgetter or lambda for the key function
- sort your list reversed (big numbers first) with the key function
- use the index
-2to access the second-smallest element
from operator import itemgetter
values = [('A', 4), ('B', 3), ('C', 1), ('D', 6), ('E', 1), ('F', -10), ('G', -20)]
# the second smallest number is -10
name_getter = itemgetter(0)
value_getter = itemgetter(1)
# itemgetter is useful as a key function for sorting
# this prevents the use of lambda
sorted_values = sorted(values, reverse=True, key=value_getter)
# btw, If you had chosen (value, name), then the key function is not required.
#
# get both, name and value
result = sorted_values[-2]
print(result)
# name_getter return index 0 from result
print(name_getter(result))
# or
print(result[0])
RE: How to find the second lowest element in the list? - Coricoco_fr - May-31-2022
Hello,
>>> students = [['Harry', 37.21], ['Berry', 37.21], ['Tina', 37.2], ['Akriti', 41], ['Harsh', 39]] >>> studList = [student[0] for student in sorted(students, key = lambda x: x[1], reverse = True)] >>> print(studList) ['Akriti', 'Harsh', 'Harry', 'Berry', 'Tina'] >>>édit: sorry
RE: How to find the second lowest element in the list? - Larz60+ - May-31-2022
students = [['Harry', 37.21], ['Berry', 37.21], ['Tina', 37.2], ['Akriti', 41], ['Harsh', 39]]
sorted_students = sorted(students, key=lambda x:x[1], reverse=True)
print(f"Second lowest = {sorted_students[-2]}", end = '')
if sorted_students[-3][1] == sorted_students[-2][1]:
print(f" and {sorted_students[-3]}")
else:
print()results:Output:Second lowest = ['Berry', 37.21] and ['Harry', 37.21]