So, calling them directly using the single tier value will fetch the lists residing inside the ndarray.,Indexing is one of the most important concepts when we talk about large data with a linear data structure. But here, within the print(), we are using three tier indexing which is not appropriate.,Doing this will make the Python interpreter understand that each of the values within the pair of square brackets represent index 0, 1, and 2 respectively. This means, only two indices are enough to represent any particular value from the NumPy array created from a nested list. It is because the NumPy array defined here has a dimension of two. You can see, the program is showing the invalid index to scalar variable error.
Hence, it is also essential to know the different ways of representing and accessing NumPy arrays data from a defined variable., If the number of square brackets is not appropriate or an anomaly occurs (the declaration and definition have two-dimensional NumPy array that uses a 3-tier indexing), then there is a possibility of index scalar variable error. To solve the invalid index to scalar variable error, programmers must keep a close eye at writing the index value and number of square brackets.