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Today, the editor will share with you the relevant knowledge points about Python features, which are detailed in content and clear in logic. I believe most people still know too much about this, so share this article for your reference. I hope you can get something after reading this article. Let's take a look at it.

Some of these features are real features, and some are traps, because it seems counterintuitive on the surface, but all of them are actually a trade-off between the pros and cons in the internal implementation of Cpython, with advantages and disadvantages. Take a special example related to strings:

> a = "wtf"

> b = "wtf"

> an is b

True

This is easier to understand. An and b point to the same object.

> a = "wtf!"

> b = "wtf!"

> an is b

False

With an exclamation point ❗, the two variables do not point to the same object.

Let's take a look at:

> A, b = "wtf!", "wtf!"

> an is b

True

If you write two variables on one line, you point to the same object again. Beginners look confused, and even if you are an experienced Python developer, you will be surprised to see this for the first time. It turns out that there are such coquettish operations in Python. If the code is executed in IDE, the result is different:

A = "wtf!"

B = "wtf!"

Print (an is b) # True

The output result is True, is it too strange to think? In fact, the knowledge involved is the optimization of string objects by CPython in order to improve performance, including the intern mechanism of strings and the knowledge of code blocks.

Of course, this library also summarizes a lot of similar operations that surprise you, such as hashing operations, dictionary features, default variable parameter traps, and so on.

These are all the contents of the article "what are the Python features?" Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.

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