Write a program in Python to check if a series contains duplicate elements or not

Input − Assume, you have the following series,

0    1 1    2 2    3 3    4 4    5

The above series contains no duplicate elements. Let’s verify using the following approaches.

Solution 1

• Assume, you have a series with duplicate elements

0    1 1    2 2    3 3    4 4    5 5    3

• Set if condition to check the length of the series is equal to the unique array series length or not. It is defined below,

if(len(data)==len(np.unique(data))):    print("no duplicates") else:    print("duplicates found")

Example

import pandas as pd import numpy as np data = pd.Series([1,2,3,4,5]) result = lambda x: "no duplicates" if(len(data)==len(np.unique(data))) else "duplicates found!" print(result(data))

Output

no duplicates

Solution 2

Example

import pandas as pd import numpy as np data = pd.Series([1,2,3,4,5,3]) if(len(data)==len(np.unique(data))):    print("no duplicates") else:    print("duplicates found")

Output

duplicates found!