How do I prevent Pandas from counting from the end when I locate a row with a negative index?-CodePudding

I have a DataFrame msftHist as shown below

                             Open        High  ...  Dividends  Stock Splits
              Date                                ...                         
              1986-03-13    0.055898    0.064119  ...        0.0           0.0
              1986-03-14    0.061378    0.064667  ...        0.0           0.0
              1986-03-17    0.063570    0.065215  ...        0.0           0.0
              ...                ...         ...  ...        ...           ...
              2021-12-17  320.880005  324.920013  ...        0.0           0.0
              2021-12-20  320.049988  322.799988  ...        0.0           0.0
              2021-12-21  323.290009  327.730011  ...        0.0           0.0
              2021-12-22  328.299988  333.609985  ...        0.0           0.0
              2021-12-23  332.750000  336.390015  ...        0.0           0.0

and when I call msftHist.iloc[-4] it returns the series corresponding to the date 2021-12-20.

How do I make it so that calling a negative index will return an error instead of just counting back from the end?

CodePudding user response：

I'm pretty sure you can't disallow negative indexing. Can you just check if the index is <0, with

if(i<0):
    raise .... #What error you want