Python Data Types

Built-in Data Types

In programming, data type is an important concept.

Variables can store data of different types, and different types can do different things.

Python has the following data types built-in by default, in these categories:

Text Type:     str
Numeric Types:     int, float, complex
Sequence Types:     list, tuple, range
Mapping Type:     dict
Set Types:     set, frozenset
Boolean Type:     bool
Binary Types:     bytes, bytearray, memoryview

Getting the Data Type

You can get the data type of any object by using the type() function.

Example

Print the data type of the variable x.

x = 5
print(type(x))

Setting the Data Type

In Python, the data type is set when you assign a value to a variable.

Example                                                        Data Type

x = "Hello World"                                                str
x = 20                                                                  int
x = 20.5                                                               float
x = 1j                                                                   complex
x = ["apple", "banana", "cherry"]                        list
x = ("apple", "banana", "cherry")                        tuple
x = range(6)                                                        range
x = {"name" : "John", "age" : 36}                       dict
x = {"apple", "banana", "cherry"}                      set
x = frozenset({"apple", "banana", "cherry"})     frozenset
x = True                                                              bool
x = b"Hello"                                                        bytes
x = bytearray(5)                                                  bytearray
x = memoryview(bytes(5))                                  memoryview

Setting the Specific Data Type

If you want to specify the data type, you can use the following constructor functions.

Example                                                      Data Type

x = str("Hello World"                                         str
x = int(20)                                                          int
x = float(20.5)                                                    float
x = complex(1j)                                                  complex
x = list(("apple", "banana", "cherry")                 list
x = tuple(("apple", "banana", "cherry"))            tuple
x = range(6)                                                       range
x = dict(name="John", age=36)                        dict
x = set(("apple", "banana", "cherry"))               set
x = frozenset(("apple", "banana", "cherry"))     frozenset
x = bool(5)                                                         bool
x = bytes(5)                                                       bytes
x = bytearray(5)                                                bytearray
x = memoryview(bytes(5))                                memoryview

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