How to Convert a Pandas DataFrame Back into a List of Lists?

Reversing the Conversion: Pandas DataFrame to List of Lists

Creating a list of lists from a pandas DataFrame is a simple operation. However, the reverse process, converting a DataFrame back into a list of lists, may not be immediately obvious.

Problem Statement:

How do we convert a pandas DataFrame back into a list of lists?

Solution:

To transform a DataFrame into a list of lists, we can utilize the underlying array and its tolist() method. Here's an example:

<code class="python">import pandas as pd

# Create a sample DataFrame
df = pd.DataFrame([[1,2,3],[3,4,5]])

# Convert the DataFrame to a list of lists
list_of_lists = df.values.tolist()

# Print the resulting list of lists
print(list_of_lists)</code>

Output:

[[1, 2, 3], [3, 4, 5]]

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