Collapse rows of a dataframe with common values and fill in blanks

I have a single data frame and every row is duplicated except for two values. In all cases the corresponding duplicate has a blank value in the corresponding row. I want to ‘collapse’ these rows and fill in the blanks.

In the example below, I want to collapse the top DataFrame to mirror the bottom

>Solution :

You can use groupby + first; first skips over NaN values by default:

collapsed_df = df.groupby("feature_id").first().reset_index()

If the empty spaces are not NaN values, probably will want to fill them with NaN first:

df = df.replace('', np.nan)