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This article focuses on "how to understand the'= = 'and' is' operators in Python". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let the editor take you to learn "how to understand the'= = 'and' is' operators in Python"!

Distinguishing analysis

Let's make some analogies with twin cats. Suppose you have a pair of twin cats that are very similar. They have the same charcoal black fur and the same sharp green eyes. Just looking at it, we can't tell which is which.

Now, bring the = = and is operators in Python into this example.

The = = operator compares by checking for equality. If the two cats are two Python objects, then if you compare them with the = = operator, return 'Both cats are Equal' as the answer.

The is operator compares by checking the identity. If we compare them with is, we will get "two cats are not equal" as the answer.

In order to really understand this, we will write some code.

First, we will create a list named a that contains elements [3, 4, 5], and another list b will point to list a.

Let's check these two lists. We can see that they point to lists that look the same.

Because the two list objects look the same, using the = = operator to compare whether they are equal will get the expected results.

However, this does not tell us whether an and b point to the same object. Of course, we know they are, because we've assigned them before, but suppose we don't know-- how do we know?

The answer is to compare the two variables with the is operator. This confirms that both variables actually point to a list object.

Now, let's use list () to create another list c that contains the elements of list a.

If we look at list c, it looks like a list pointed to by an and b.

Now, we will compare an and c using the = = and is operators.

Here, the = = operator is true because they all have the same content.

Python tells us that c and a point to two different objects, although their contents may be the same.

So, to sum up, let's try to break down the difference between is and = = into two short definitions.

If two variables point to the same object, the is expression evaluates to True.

If the object referenced by the variable is equal (the same content), the = = expression evaluates to True.

At this point, I believe you have a deeper understanding of "how to understand the'= = 'and' is' operators in Python". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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