This is the final chapter of the lists in python topic, in this chapter we will create an example that will remove the duplicate student names within a student list with the help of the python loop.
We are given a list of student names, our mission is to remove the duplicate student name from the list.
student = ["Rick", "Ricky", "Richard", "Rick", "Rickky", "Rick", "Rickky"] # there are names that have been duplicated
double_enter = []
# first we need to know all the duplicate student names
for i in range(len(student)):
count = student.count(student[i])
if count > 1:
if student[i] not in double_enter:
double_enter.append(student[i])
# then we will remove those duplicate student names
for name in student:
if name in double_enter and student.count(name) > 1:
student.remove(name)
print(student)
The above python program is very long, can you find a shorter method to achieve the above outcome? Write your own solution in the comment box below.
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student = list(set(student)) # if you need a list, otherwise just use set()
print(student)
There are several ways to do it, this Stack Overflow question is a good summary:
https://stackoverflow.com/questions/7961363/removing-duplicates-in-lists
Briefly, if order doesn’t matter, list(set(your_list)) does the job; if order matters you can use an OrderedDict to do something similar; if the contents of the list are not hashable, the fourth answer in that link has a loop that is simpler than yours.
students = [“Rick”, “Ricky”, “Richard”, “Rick”, “Rickky”, “Rick”, “Rickky”]
print(list(set(students)))