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This article mainly introduces what python common placeholders are and how to use the relevant knowledge, the content is detailed and easy to understand, simple and fast operation, has a certain reference value, I believe you read this python common placeholders what and how to use the article will have some harvest, let's take a look at it.

Placeholder description

1,% c, format characters and their ASCII codes

2.% s, formatting string

3.% d, formatted integer

4.% u, formatting unsigned integers

5.% o, formatting unsigned octal numbers

Instance print ("% 2d-d"% (3,1)) print ("% .2f"% 3.1415926) result: 3-013.14

Expansion of basic knowledge points:

Placeholders, as the name implies, are symbols that stand in the output. We can think of it as our hotel reservation. When we tell the hotel, there will be our reservation in the hotel system. Although we didn't go now, the later customers were right behind us.

There are three common placeholders:

1% d integer placeholder

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% d can only occupy a bit integer, and it will be converted to an integer even if the original number is a floating-point number.

2% f floating point placeholder

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% f can only occupy a floating-point number, and%. Xf is accurate to x places after the decimal point.

3% s string placeholder

> "% s"% Ture "Ture" > "% s recorder% s"% (123rem ABC) "123jue ABC"

% s occupies a placeholder string and is used the most.

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