np.unique() - Find unique elements in an array

[TheWolf313]

Syntax:
np.unique(ar, return_index=False, return_inverse=False, return_counts=False)

ar: Input array.

return_index: If True, also return the indices of the input array that give the unique values.

return_inverse: If True, also return the indices to reconstruct the original array from the unique array.

return_counts: If True, also return the number of times each unique value comes up.

Example:
import numpy as np
unique_vals = np.unique(np.array([1, 2, 2, 3, 4, 4, 4]))
print(unique_vals)

[1 2 3 4]

import numpy as np
arr = np.array([1, 2, 2, 3, 4, 4, 4])
values, counts = np.unique(arr, return_counts=True)
print("Unique values:", values)
print("Counts:", counts)

Unique values: [1 2 3 4]
Counts: [1 2 1 3]