How to use braces in .format in Python

The format function of strings in python is very powerful. It can be said that it can completely replace other methods of using strings

Format function example:

The brace usage of format can realize the splicing of strings

The order within the braces can be scrambled, and the order in {} can be written into the format

Retain the decimal point of the output Number

Limit the number of digits in the output number, and also retain the number of decimal places

Thousands separator output

Percent sign output

How does Python use braces in .format

For example: the string hello {name}

'hello {name}.format(name='world')' Brackets are special escape characters. If you need original curly braces, use {{ instead of {, use }} instead of }, as follows:

>>> 'hello {{worlds in braces!}}, {name}'.format(name='zhangsan')
'hello {worlds in braces!}, zhangsan'

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