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Python Pandas - Set the categories of the CategoricalIndex to be ordered
To set the categories of the CategoricalIndex to be ordered, use the as_ordered() method in Pandas.
At first, import the required libraries −
import pandas as pd
Set the categories for the categorical using the "categories" parameter −
catIndex = pd.CategoricalIndex(["p", "q", "r", "s","p", "q", "r", "s"], categories=["p", "q", "r", "s"])
Get the categories −
print("\nDisplaying Categories from CategoricalIndex...\n",catIndex.categories)
Set the categories to be ordered −
print("\nCategoricalIndex ordered...\n", catIndex.as_ordered())Example
Following is the code −
import pandas as pd
# Set the categories for the categorical using the "categories" parameter
catIndex = pd.CategoricalIndex(["p", "q", "r", "s","p", "q", "r", "s"], categories=["p", "q", "r", "s"])
# Display the CategoricalIndex
print("CategoricalIndex...\n",catIndex)
# Get the categories
print("\nDisplaying Categories from CategoricalIndex...\n",catIndex.categories)
# Set the categories to be ordered
print("\nCategoricalIndex ordered...\n", catIndex.as_ordered())Output
This will produce the following output −
CategoricalIndex... CategoricalIndex(['p', 'q', 'r', 's', 'p', 'q', 'r', 's'], categories=['p', 'q', 'r', 's'], ordered=False, dtype='category') Displaying Categories from CategoricalIndex... Index(['p', 'q', 'r', 's'], dtype='object') CategoricalIndex ordered... CategoricalIndex(['p', 'q', 'r', 's', 'p', 'q', 'r', 's'], categories=['p', 'q', 'r', 's'], ordered=True, dtype='category')
Updated on: 18-Oct-2021
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