Identify duplicate values in a list in Python
List of duplicate and unique Values
thelist = [1, 2, 3, 4, 4, 5, 5, 6, 1]
def dup(x):
duplicate = []
unique = []
for i in x:
if i in unique:
duplicate.append(i)
else:
unique.append(i)
print("Duplicate values: ", duplicate)
print("Unique Values: ", unique)
dup(thelist)
Duplicate values: [4, 5, 1] Unique Values: [1, 2, 3, 4, 5, 6]
Get all index for duplicate element
thelist = [1, 2, 3, 4, 4, 5, 5, 6, 1]
x = set(thelist)
dup = []
for c in x:
if(thelist.count(c) > 1):
indices = [i for i, x in enumerate(thelist) if x == c]
dup.append((c, indices))
print(dup)
[(1, [0, 8]), (4, [3, 4]), (5, [5, 6])]