python has duplicates
def has_duplicates(lst):
    return len(lst) != len(set(lst))
    
x = [1,2,3,4,5,5]
has_duplicates(x) 			# True
                                
                            python has duplicates
def has_duplicates(lst):
    return len(lst) != len(set(lst))
    
x = [1,2,3,4,5,5]
has_duplicates(x) 			# True
                                
                            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)
                                
                            python check for duplicate
def checkDuplicate(user):
    if len(set(user)) < len(user):
        return True
    return False
                                
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