How Python finds the index of an element in a two-dimensional array

This article mainly introduces how Python finds the index of an element in the two-dimensional array of related knowledge, the content is detailed and easy to understand, the operation is simple and fast, has a certain reference value, I believe that after reading this Python how to find out the index of an element in the two-dimensional array article will have a harvest, let's take a look.

1. The index of the array

I'm using the iloc function. The imported data is data, and the index data.iloc [iJournal j], I represents rows, j represents columns. If you want to index all the row elements after the line I, use data.iloc [iRJ], and all rows before the line I, use data.iloc [: iMagee j].

two。 Splicing of arrays

You can use the append function. Np.apend (a _ r _ b), an and b are arrays to be spliced.

Because I need to splice one-dimensional array into two-dimensional array by row, select vstack function, can achieve vertical splicing. Np.vstack ((a) b))

3. Array deletes one or more rows of elements

I'm using the drop function. Data.drop ([I]), which represents the deletion of line I elements. The drop function can also delete multi-line elements, data.drop ([iJJ _ k]).

Python finds the index of an element in a two-dimensional array and defines the function.

Look at the code # function: find the index of an element in a two-dimensional array # function: return all index numbers def found (List,AimList): # List: search array, AimList: target element print ('original array is:') print (List) print ('target array is:') print (AimList) num= [] iObject0 length=len (List) while I