python unique values in array code example

Example 1: python list with only unique values

my_list = list(set(my_list))

Example 2: count unique values in python

words = ['a', 'b', 'c', 'a']
unique_words = set(words)             # == set(['a', 'b', 'c'])
unique_word_count = len(unique_words) # == 3

Example 3: return position of a unique value in python array

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