unique values in array python code example

Example 1: python list with only unique values

my_list = list(set(my_list))

Example 2: count unique values in python

aa="XXYYYSBAA"
bb=dict(zip(list(aa),[list(aa).count(i) for i in list(aa)]))
print(bb)
# output:
# {'X': 2, 'Y': 3, 'S': 1, 'B': 1, 'A': 2}

Example 3: python count unique values in list

len(set(["word1", "word1", "word2", "word3"]))
# set is like a list but it removes duplicates
# len counts the number of things inside the set

Example 4: return position of a unique value in python array

def partition(array):
  return {i: (array == i).nonzero()[0] for i in np.unique(array)}

Example 5: python .unique()

np.unique([1, 1, 2, 2, 3, 3])
array([1, 2, 3])