Values in a
Series object can be retrieved using the
 operator and passing either a single index label or a list of index labels. The following code retrieves the value associated with the index label
'a' of the
s3 series defined earlier:
In : # single item lookup s3['a'] Out: 1
Series using an integer value will perform a zero-based position lookup of the value:
In : # lookup by position since the index is not an integer s3 Out: 2
This is because pandas determines that the specified value is an integer and that the index is not an integer-based index. Given this, pandas decides to perform a lookup by position and not by index label.
To retrieve multiple items, you can pass a ...