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Python Data Types
Built-in Data Types
In planning, 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 automatically built into 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 for any item 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, a type of data is set when you specify 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 a data type, you can use the following builder 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 |