How to rename a DataFrame column in Pandas?

 You can rename a column in Pandas using the rename() method. Here's an example:

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import pandas as pd

# Create a sample dataframe
df = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6]})

# Rename column 'A' to 'new_column_name'
df = df.rename(columns={'A': 'new_column_name'})

In the above example, we first create a dataframe with two columns 'A' and 'B'. To rename column 'A' to 'new_column_name', we use the rename() method and pass a dictionary to the columns parameter, where the keys are the original column names and the values are the new names. The method returns a new dataframe with the updated column name.

Note that the rename() method does not modify the original dataframe in-place, so we need to assign the result to a new dataframe or overwrite the original dataframe with the updated one.