How to Consolidate Two DataFrames Extracted from a Larger Dataframe?

Consolidating Two DataFrames

When extracting subsets from a dataframe D, developers often find themselves with multiple dataframes that need to be combined. This article addresses the question of merging two dataframes, focusing specifically on the process of consolidating frames A and B, extracted from D using the conditions:

A = D[D.label == k]
B = D[D.label != k]

Merging Dataframes

To merge dataframes, utilize the append method. The following code demonstrates the usage:

df_merged = df1.append(df2, ignore_index=True)

Preserving Indexes

If the order of data is not crucial, but maintaining the indexes from the original dataframe D is desired, set the ignore_index parameter to False:

df_merged = df1.append(df2, ignore_index=False)

Note: The append method has been deprecated in version 1.4.0. It is recommended to use the concat function instead.

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