Example 1: count the duplicates in a list in python
some_list=['a','b','c','b','d','m','n','n']
my_list=sorted(some_list)
duplicates=[]
for i in my_list:
if my_list.count(i)>1:
if i not in duplicates:
duplicates.append(i)
print(duplicates)
Example 2: python has duplicates
def has_duplicates(lst):
return len(lst) != len(set(lst))
x = [1,2,3,4,5,5]
has_duplicates(x) # True
Example 3: duplicate in list python
a = [1,2,3,2,1,5,6,5,5,5]
import collections
print([item for item, count in collections.Counter(a).items() if count > 1])
## [1, 2, 5]
Example 4: how to check if there are duplicates in a list python
>>> your_list = ['one', 'two', 'one']
>>> len(your_list) != len(set(your_list))
True
Example 5: python check for duplicate
def checkDuplicate(user):
if len(set(user)) < len(user):
return True
return False
Example 6: find duplicates in list python
def Find_Repeated(x):
x2=sorted(x)
List_Of_Repeated=[]
for i in x2:
if x2.count(i)>1:
List_Of_Repeated.append([i,x2.count(i)])
for c in range(x2.count(i)):
for j in x2:
if i==j and x2.count(i)>1:
x2.remove(i)
List_Of_Repeated.sort()
return List_Of_Repeated
List=[1,2,3,4,4,4,5,5,5,5,5,1,1,2,2,3,7,8,6]
# Repeated numbers: [1,2,3,4,5]
# Simple print output:
print(Find_Repeated(List),"\n")
# For a neat output:
print("[ Value , Times Repeated ] \n")
print("For example: [2,4] The value 2 was repeated 4 times. \n")
for i in Find_Repeated(List):
print(i)