Python is a high-level, general-purpose programming language known for its readability and simplicity. Learn the features, applications, and advantages of Python.
The @ symbol in Python is used to apply a decorator to an existing function or method and extend its functionality.For example, this piece of code . . .def extend_behavior(func): return func @extend_behavior def some_func(): pass
可变数据类型:List、Dict、Set 不可变数据类型:Number、String、Tuple Number 数字类型 Number类型包含:int、float、bool、complex(复数) 注意: 在python3中,bool是int的子类;在值方面,True==1、False==0,当然,它们的id(内存地址)不同,仅是值相同;布尔类型可以和数字类型进行相加减。而python2中没有布尔类型,用...
元祖也可以作为字典的key。 t=(1,[1,3],'sss',(1,2))#t=tuple((1,[1,3],'sss',(1,2)))print(type(t))#<class 'tuple'> 虽然元祖为不可变类型,但是只要元祖内部的元素的id不发生变化,其内部元素发生变化是允许的,如列表为元祖的元素,列表内元素发生变化但id不变是可以允许的。 集合set: 定义...
1. Using an “assert” Statement in Python? In Python programming, the “assert” statement stands as a flag for code correctness, a vigilant guardian against errors that may lurk within your scripts.”assert” is a Python keyword that evaluates a specified condition, ensuring that it holds tr...
Here's a fun project attempting to explain what exactly is happening under the hood for some counter-intuitive snippets and lesser-known features in Python.While some of the examples you see below may not be WTFs in the truest sense, but they'll reveal some of the interesting parts of ...
An API, or application programming interface, is a set of rules and protocols that allows applications to exchange data, perform actions, and interact in a well-documented way. When a request is made—for a weather update, say—the API processes the request, executes the necessary actions, an...
When a software language is created, its creators must specify a set of rules. These rules provide the grammar needed to construct valid statements in the language. The following is a set of grammatical rules for a simple fictional language that only contains a few words: ...
What is a context manager in Python? How do I write a context manager class? How do I use the with statement on a context manager object?The context manager you previously wrote is a class, but what if you want to create a context manager method similar to the open() function instead...
the type used to hold data is bytes. The biggest difference with the 2.x situation is that any attempt to mix text and data in Python 3.0 raises TypeError, whereas if you were to mix Unicode and 8-bit strings in Python 2.x, it would work if the 8-bit string happened to contain on...