Replacing Values in a Pandas DataFrame Column

You aim to replace values in a DataFrame column named 'female', which contains the values 'female' and 'male'. You've attempted to use the code snippet:

w['female']['female']='1'
w['female']['male']='0' 

However, the DataFrame remains unchanged. To address this, let's explore why your approach failed and provide a solution.

Your code fails because accessing a DataFrame column by using ['female'] as the second argument does not filter rows based on the column values. Instead, it selects rows where the index is 'female', which may not exist in your DataFrame.

A correct approach is to use the map function, which applies a transformation to each element of the column. For example, you can use this code:

w['female'] = w['female'].map({'female': 1, 'male': 0})

This code maps the 'female' value to 1 and the 'male' value to 0, effectively replacing the column values while preserving the index. Alternatively, you can use the replace function to achieve a similar result:

w['female'] = w['female'].replace(['female', 'male'], [1, 0])

By utilizing either of these methods, you can successfully replace the values in the 'female' column according to your desired output.