Overview of Data types in Python

Data types

Match the data samples with their types.

Definitions

Immutable and mutable data types

In Python there are basic and composite data types. The values of basic data types cannot be changed, they are immutable. Most of the composite data types are mutable.

The immutable data types in Python are:

• Boolean (True / False)
• Integer (0, 1, -3)
• Float (1.0, -0.3, 1.2345)
• Strings ('apple', "banana") - both single and double quotes are valid
• None (aka an empty variable)
• Tuples (multiple values in parentheses, e.g. ('Jack', 'Smith', 1990))

The mutable data types are

• List [1, 2, 2, 3]
• Dictionary {'name': 'John Smith', 'year': 1990}
• Set ()

Type conversions

Values can be converted into each other using conversion functions. Try the following:

int('5.5')
float(5)
str(5.5)
list("ABC")
tuple([1,2,3])
dict([('A',1),('B',2)])
set([1,2,2,3])