Understanding the list data type
In Chapter 3, Using Python as a Financial Calculator, tuples
are introduced as one of the data types. Recall that a tuple is defined by using parentheses such as x=(1,2,3,"Hello")
. In addition, after a tuple
is defined, we cannot change its values. Like tuples
, the lists
data type could contain different types of data, and their first subscripts start from 0. The following Python commands generate a list for variable x
:
>>>x=[1,2,"John", "M", "Student"] >>>type(x) <class 'list'>
From the preceding code statements, we know that a set of variables included will be closed by a pair of square brackets, that is []. To call specific data item(s), we could use different ways to achieve our goals. The following commands show how to pick up individual data items for different goals:
>>>x [1, 2, 'John', 'M', 'Student'] >>>x[1] 2 >>>x[2:...