Examples :
Input: 10 20 10 30 40 40 Output: 10 20 30 40 Input: 1 2 1 1 3 4 3 3 5 Output: 1 2 3 4 5
Method 1: traversing the list
Using traversal, we can traverse for each element in the list and check if an item in the unique_list, if it is not there, then we can add it to the unique_list. This is done using one for a for loop and another if statement that checks if a value is in a unique list or not, which is equivalent to another for a loop.
| # Python program to check if two
# get unique values from the list
# use bypass
# function to get unique values def unique (list1): # use an empty list unique_list = [] # move for all elements for x in list1: # check if unique_list exists or not if x not in unique_list: unique_list.append (x) # print list for x in unique_list: print x,
# driver code list1 = [ 10 , 20 , 10 , 30 , 40 , 40 ] print ( " the unique values from 1st list is " ) unique (list1) list2 = [ 1 , 2 , 1 , 1 , 3 , 4 , 3 , 3 , 5 ] print ( " the unique values from 2nd list is " ) unique (list2) |
Exit:
the unique value s from 1st list is 10 20 30 40 the unique values from 2nd list is 1 2 3 4 5
Method 2: Using Set
Using the | # Python program to check if two
# get unique values from the list
# using a set
# function to get unique values def unique (list1): # insert list into set list_set = set (list1) # convert set to list unique_list = ( list (list_set)) for x in unique_list: print x,
# driver code list1 = [ 10 , 20 , 10 , 30 , 40 , 40 ] print ( "the unique values from 1st list is" ) unique (list1) list2 = [ 1 , 2 , 1 , 1 , 3 , 4 , 3 , 3 , 5 ] print ( "the unique values from 2nd list is" ) unique (list2) |
Exit :
the unique values from 1st list is 40 10 20 30 the unique values from 2nd list is 1 2 3 4 5
Method 3: Using numpy.unique
Using Python import numpy also produces unique elements in an array. First, convert the list to x = numpy.array (list), and then use the numpy.unique (x) function to get unique values from the list. numpy.unique () only returns unique values in the list.
| # Ppython program to check if two
# get unique values from the list
# using numpy.unique import numpy as np
# function for getting unique values def unique (list1 ): x = np.array (list1) print (np.unique (x))
# driver code list1 = [ 10 , 20 , 10 , 30 , 40 , 40 ] print ( "the unique values from 1st list is" ) unique (list1) list2 = [ 1 , 2 , 1 , 1 , 3 , 4 , 3 , 3 , 5 ] print ( "the unique values from 2nd list is" ) unique ( list2) |
Exit
the unique values from 1st list is [10 20 30 40] the unique values from 2nd list is [1 2 3 4 5]
