Indexing Operations (.iloc)
Learn how to retrieve and manipulate records based on a positional index.
We'll cover the following...
The iloc attribute
The series also supports indexing off the iloc attribute. This attribute is analogous to loc but with a few differences. We pull out items by index position when we slice off this attribute. The iloc attribute supports indexing with the following:
- A scalar index position (an integer).
- A list of index positions.
- A slice of positions (half-open interval so it doesn’t include stop value).
- A NumPy array (or Python list) of boolean values.
- A function that accepts a Series and returns one of the above.
In the examples below, we’ll pull out the first and last values by slicing off of iloc with a scalar. Note that because index positions are unique, we’ll always get the scalar value when indexing with iloc at a position:
print(city2.iloc[0])
We can also use negative indexing to pull out the last value:
print(city2.iloc[-1])
Indexing off the iloc attribute will return a scalar by location in the Series.
If we want to return a Series object, we can index it with a list of positions. This can be a list with a single ...