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Today, I will talk to you about how to use the Python interpreter for programming, many people may not know much about it. In order to make you understand better, the editor has summarized the following for you. I hope you can get something according to this article.

This article has nothing to do with things like how to break into other people's computer systems. I don't care about that kind of thing, so please don't email ask me those things.

Be careful. For the examples in this article to work correctly, you should write them in a text file and run them with an interpreter; don't try to run them directly in interactive mode-not all of them work that way.

To write programs with the Python interpreter, you must first install a Python interpreter. It can exist on most platforms, including Macintosh, Unix, and Windows. More information about this can be found on the python website. You should also have a text editor (like emacs, notepad, or something like that).

You can probably see the similarity between it and the ham salad recipe (albeit with some subtle differences). But how does it work? First of all, lines that start with # are called comments that are actually ignored by the computer. However, inserting small comments like this is important to enhance the readability of your program. Next, rows that look like foo = bar are called assignments.

In the case of width = 20, it tells the computer that width stands for 20 from here. It also means that a variable with the name "width" is created (if it already exists, it will be overwritten again).

So, when we use this variable later, the computer knows its value. However, this is actually no more interesting than the program that calculates the rectangular area. At least in my opinion. It's a little stiff. What if we see a circle with a radius of 31?

How to let the computer know? It's a bit like the salad recipe: "cook for 3 to 4 minutes until the ham is cooked." To know when it is cooked, we must check it. We need feedback, or hints. How does the computer know the radius of our circle? You also need to input data. What we can do is tell the computer what the radius is:

# Calculate all the primes below 1000 # (Not the best way to do it, but...) Result = [1] candidates = range (3, 1000) base = 2 product = base while candidates: while product < 1000: if product in candidates: candidates.remove (product) productproduct = product+base result.append (base) base = candidates [0] product = base del candidates [0] result.append (base) print result

Now the program is a little more beautiful. Input is something called a function. Soon you will learn to create your own functions. Input is a built-in function of the Python interpreter. (just write down that input won't do anything. You must put a pair of parentheses after it. So input () works-it simply asks the user to enter the length of the radius.

The above version may be more user-friendly because it prints a problem first. When we put the characters such as "What is the radius?" And so on are placed in parentheses of the function call. This process is called parameter passing of a function. The content in parentheses is called a parameter. In the previous example we passed a question as a parameter so that input knew what to print before getting the answer.

After reading the above, do you have any further understanding of how to program with the Python interpreter? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

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