I have a Pandas DataFrame df which relates to the non-trivial part of data: df.head() spits
item_cnt_month
ID
2 0.441488
5 0.461178
6 0.262789
10 2.861585
14 3.616117
I know that the final DataFrame has to be of size 214200 and thus I want to put the missing IDs with corresponding item_cnt_month equal to zero . How to do it?
I believe you need:
df = df.reindex(np.arange(214200), fill_value=0)
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