Python-Datentypen

Built-in data types

In programming, data type is an important concept.

Variables can store different types of data, and different types can perform different operations.

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

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

Get data type

You can use the type() function to get the data type of any object:

Instance

Print the data type of variable x:

x = 10
print(type(x))

Run instance

Set data type

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

示例 数据类型 试一试
x = "Hello World" str 试一试
x = 29 int 试一试
x = 29.5 float 试一试
x = 1j complex 试一试
x = ["apple", "banana", "cherry"] list 试一试
x = ("apple", "banana", "cherry") tuple 试一试
x = range(6) range 试一试
x = {"name" : "Bill", "age" : 63} dict 试一试
x = {"apple", "banana", "cherry"} set 试一试
x = frozenset({"apple", "banana", "cherry"}) frozenset 试一试
x = True bool 试一试
x = b"Hello" bytes 试一试
x = bytearray(5) bytearray 试一试
x = memoryview(bytes(5)) memoryview 试一试

设定特定的数据类型

如果希望指定数据类型，则您可以使用以下构造函数：

示例 数据类型 试一试
x = str("Hello World") str 试一试
x = int(29) int 试一试
x = float(29.5) float 试一试
x = complex(1j) complex 试一试
x = list(("apple", "banana", "cherry")) list 试一试
x = tuple(("apple", "banana", "cherry")) tuple 试一试
x = range(6) range 试一试
x = dict(name="Bill", age=36) dict 试一试
x = set(("apple", "banana", "cherry")) set 试一试
x = frozenset(("apple", "banana", "cherry")) frozenset 试一试
x = bool(5) bool 试一试
x = bytes(5) bytes 试一试
x = bytearray(5) bytearray 试一试
x = memoryview(bytes(5)) memoryview 试一试