Get row-index values of Pandas DataFrame as list?

Get row-index values of Pandas DataFrame as list?

To get the row-index values of a Pandas DataFrame as a list, you can use the .index attribute of the DataFrame. This attribute returns an Index object, which you can convert to a list using the tolist() method or by explicitly converting it using list(). Here's how you can do it:

import pandas as pd # Create a sample DataFrame data = {'A': [1, 2, 3], 'B': [4, 5, 6]} df = pd.DataFrame(data) # Get the row-index values as a list row_index_list = df.index.tolist() # Alternatively, you can use list() to convert the Index object to a list # row_index_list = list(df.index) print(row_index_list)

In this example, df.index.tolist() or list(df.index) will give you a list containing the row-index values of the DataFrame df. The row_index_list variable will contain [0, 1, 2] in this case, which are the default integer row indices for a newly created DataFrame.

Examples

  1. "How to get row-index values of Pandas DataFrame as a list?"

    Description: Users often seek ways to extract the row index values of a Pandas DataFrame and convert them into a list for further processing or analysis.

    Code:

    # Import Pandas library import pandas as pd # Sample DataFrame df = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6]}, index=['X', 'Y', 'Z']) # Getting row index values as a list row_index_list = df.index.tolist() print("Row index values as list:", row_index_list)

  2. "Extract DataFrame row index to a Python list"

    Description: This query is a variation of the first, aiming to achieve the same goal but phrased differently.

    Code:

    # Import Pandas library import pandas as pd # Sample DataFrame df = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6]}, index=['X', 'Y', 'Z']) # Extracting row index values as a list row_index_list = list(df.index) print("Row index values as list:", row_index_list)

  3. "Get row names from Pandas DataFrame as list"

    Description: Users may refer to DataFrame indices as row names, seeking a method to obtain them as a list.

    Code:

    # Import Pandas library import pandas as pd # Sample DataFrame df = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6]}, index=['X', 'Y', 'Z']) # Extracting row names as a list row_names_list = df.index.tolist() print("Row names as list:", row_names_list)

  4. "Python Pandas DataFrame: Convert index to list"

    Description: This query explicitly mentions converting the DataFrame index to a list using Pandas in Python.

    Code:

    # Import Pandas library import pandas as pd # Sample DataFrame df = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6]}, index=['X', 'Y', 'Z']) # Converting DataFrame index to a list index_list = df.index.tolist() print("Index as list:", index_list)

  5. "Python DataFrame: Extract index values as list"

    Description: Users want to know how to extract index values from a DataFrame in Python as a list.

    Code:

    # Import Pandas library import pandas as pd # Sample DataFrame df = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6]}, index=['X', 'Y', 'Z']) # Extracting index values as a list index_values_list = df.index.tolist() print("Index values as list:", index_values_list)

  6. "Pandas DataFrame: Convert index to list of strings"

    Description: Users may specifically want to convert DataFrame indices to a list of strings for various applications.

    Code:

    # Import Pandas library import pandas as pd # Sample DataFrame df = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6]}, index=['X', 'Y', 'Z']) # Converting index to a list of strings index_as_strings = df.index.astype(str).tolist() print("Index as list of strings:", index_as_strings)

  7. "Get row labels of Pandas DataFrame as a list in Python"

    Description: Users inquire about extracting row labels (index values) of a Pandas DataFrame as a list using Python.

    Code:

    # Import Pandas library import pandas as pd # Sample DataFrame df = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6]}, index=['X', 'Y', 'Z']) # Getting row labels as a list row_labels_list = df.index.tolist() print("Row labels as list:", row_labels_list)

  8. "Python Pandas DataFrame: Access row index values as a list"

    Description: Users want to access the row index values of a Pandas DataFrame and store them as a list in Python.

    Code:

    # Import Pandas library import pandas as pd # Sample DataFrame df = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6]}, index=['X', 'Y', 'Z']) # Accessing row index values as a list row_index_values = df.index.tolist() print("Row index values as list:", row_index_values)

  9. "Convert DataFrame row index to Python list"

    Description: This query asks how to convert the row index of a DataFrame to a list in Python.

    Code:

    # Import Pandas library import pandas as pd # Sample DataFrame df = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6]}, index=['X', 'Y', 'Z']) # Converting DataFrame row index to a list row_index_list = df.index.tolist() print("Row index as list:", row_index_list)

  10. "Python Pandas DataFrame: Get row index as list"

    Description: Users seek a straightforward method to obtain the row index of a Pandas DataFrame as a list using Python.

    Code:

    # Import Pandas library import pandas as pd # Sample DataFrame df = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6]}, index=['X', 'Y', 'Z']) # Getting row index as a list row_index_list = df.index.tolist() print("Row index as list:", row_index_list)

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