how to dulipcate s element from list code example
Example 1: 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])
Example 2: python copy list
METHOD TIME TAKEN
b = [*a] 2.75180600000021
b = a * 1 3.50215399999990
b = a[:] 3.78278899999986
b = a.copy() 4.20556500000020
b = []; b.extend(a) 4.68069800000012
b = a[0:len(a)] 6.84498999999959
*b, = a 7.54031799999984
b = list(a) 7.75815899999997
b = [i for i in a] 18.4886440000000
b = copy.copy(a) 18.8254879999999
b = []
for item in a:
b.append(item) 35.4729199999997