Iloc cannot enlarge its target object

Solution: iloc cannot enlarge its target object

The error message “iloc cannot enlarge its target object” typically occurs when trying to access elements using the iloc method in pandas DataFrame, and the index being accessed is out of bounds.

Here’s an example to illustrate this error:

import pandas as pd

# Create a DataFrame
data = {'Col1': [1, 2, 3],
        'Col2': [4, 5, 6]}
df = pd.DataFrame(data)

# Trying to access an out of bounds index
df.iloc[3]  # Raises the "iloc cannot enlarge its target object" error
  

In the above example, we create a DataFrame with two columns “Col1” and “Col2” containing values 1 to 6. When we try to access index 3 using iloc, it goes beyond the available indices (0 to 2) and raises the error.

To fix this error, ensure that you are accessing valid indices within the DataFrame. Here are a few possible solutions:

1. Use the correct index range: Make sure to use an index within the range [0, len(df)-1].
2. Check the size of the DataFrame: Verify that the DataFrame has the expected number of rows.
3. Reset the DataFrame index: If the DataFrame has a custom index, consider resetting it to the default integer index using the reset_index() method. This can be useful if the custom index is not consecutive or contains gaps. For example:

   df = df.reset_index(drop=True)  # Reset index to consecutive integers starting from 0