adding non-failure data to failure one
As far as I understand, you want to combine two datasets to use both for training??

If yes, you need to append one dataframe to the other. You need to make sure, that all columns/features needed for training are present in both DFs. After that you can simply append the DFs.

Python example:

&gt;&gt;&gt; df = pd.DataFrame([[1, 2], [3, 4]], columns=list('AB'))
&gt;&gt;&gt; df
   A  B
0  1  2
1  3  4
&gt;&gt;&gt; df2 = pd.DataFrame([[5, 6], [7, 8]], columns=list('AB'))
&gt;&gt;&gt; df.append(df2)
   A  B
0  1  2
1  3  4
0  5  6
1  7  8


https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.append.html