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Python Pandas - Return unique values in the index
To return unique values in the index, use the index.unique() method in Pandas. At first, import the required libraries -
import pandas as pd
Creating Pandas index −
index = pd.Index([10, 50, 70, 10, 90, 50, 10, 30])
Display the Pandas index −
print("Pandas Index...\n",index)
Get the unique values from the index. Unique values are returned in order of appearance, this does NOT sort −
index.unique()
Example
Following is the code −
import pandas as pd # Creating Pandas index index = pd.Index([10, 50, 70, 10, 90, 50, 10, 30]) # Display the Pandas index print("Pandas Index...\n",index) # Return the number of elements in the Index print("\nNumber of elements in the index...\n",index.size) # Return the dtype of the data print("\nThe dtype object...\n",index.dtype) # get the unique values from the index # Unique values are returned in order of appearance, this does NOT sort print("\nUnique values from the Index..\n", index.unique())
Output
This will produce the following output −
Pandas Index... Int64Index([10, 50, 70, 10, 90, 50, 10, 30], dtype='int64') Number of elements in the index... 8 The dtype object... int64 Unique values from the Index.. Int64Index([10, 50, 70, 90, 30], dtype='int64')
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