リスト内の重複を印刷または削除する

Mar 2, 2017

Python で指定されたリストから重複した項目をすばやく印刷または削除する方法。

Remove duplicates only

# simply change list to set, e.g.
list_with_dups = [1, 2, 3, 1]
list_without_dups = list(set(list_with_dups))

Find out duplicates only

import collections
list_with_dups = [1, 2, 3, 1]
print [item for item, count in collections.Counter(list_with_dups).items() if count > 1]

Find out and remove duplicates

list_with_dups = [1, 2, 3, 1]
dups = []
uniq = []
for item in list_with_dups:
    if item not in uniq:
        uniq.append(item)
    else:
        dups.append(item)
# print dups
print dups
# print unique list with dups removed
print uniq

Also see this stackoverflow post for reference.

python