<\/span><\/h2>\n\n\n\nAt its core, a format string is a template that helps you control the way data is displayed. This is especially useful when you want to present data to users in a clear and organized manner. Python provides a powerful string formatting mechanism using the format()<\/code> method. This method allows you to insert values into placeholders within a string, making it a versatile tool for various applications.<\/p>\n\n\n\n<\/span>Basic Syntax and Usage<\/strong><\/span><\/h2>\n\n\n\nLet’s start by looking at the basic syntax of a Python format string:<\/p>\n\n\n\n
<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>text <\/span>=<\/span> <\/span>"<\/span>Hello, <\/span>{}<\/span>!<\/span>"<\/span><\/span>\nname <\/span>=<\/span> <\/span>"<\/span>Alice<\/span>"<\/span><\/span>\nformatted_text <\/span>=<\/span> text.format(name)<\/span><\/span>\nprint<\/span>(formatted_text)<\/span><\/span><\/code><\/pre>Python<\/span><\/div>\n\n\n\n<\/p>\n\n\n\n
In this example, the curly braces {} act as placeholders. The format() method replaces these placeholders with the value of the variable, resulting in the output: “Hello, Alice!”<\/p>\n\n\n\n
<\/span>Positional and Named Arguments<\/strong><\/span><\/h3>\n\n\n\nPython format strings support both positional and named arguments. Positional arguments are supplied in the order they appear in the format string, while named arguments are provided with a key-value pairing. Here’s an example:<\/p>\n\n\n\n
<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>item <\/span>=<\/span> <\/span>"<\/span>book<\/span>"<\/span><\/span>\nprice <\/span>=<\/span> <\/span>19.99<\/span><\/span>\nformatted_order <\/span>=<\/span> <\/span>"<\/span>Your <\/span>{}<\/span> costs $<\/span>{<\/span>:.2f<\/span>}<\/span>"<\/span>.format(item, price)<\/span><\/span>\nprint<\/span>(formatted_order)<\/span><\/span><\/code><\/pre>Python<\/span><\/div>\n\n\n\n<\/p>\n\n\n\n
In this case, the placeholder {:.2f}<\/code> formats the price with two decimal places.<\/p>\n\n\n\nYou can also use named arguments for more clarity:<\/p>\n\n\n\n
<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>formatted_order <\/span>=<\/span> <\/span>"<\/span>Your <\/span>{item}<\/span> costs $<\/span>{price<\/span>:.2f<\/span>}<\/span>"<\/span>.format(<\/span>item<\/span>=<\/span>"<\/span>pen<\/span>"<\/span>, <\/span>price<\/span>=<\/span>5.49<\/span>)<\/span><\/span>\nprint<\/span>(formatted_order)<\/span><\/span><\/code><\/pre>Python<\/span><\/div>\n\n\n\n<\/p>\n\n\n\n
<\/span>Alignment and Padding<\/strong><\/span><\/h3>\n\n\n\nFormatting isn’t just about inserting values; it’s also about controlling the alignment and padding of the text. You can use alignment specifiers to adjust how your data is displayed within a certain width. Here’s an example:<\/p>\n\n\n\n
<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>title <\/span>=<\/span> <\/span>"<\/span>Python Guide<\/span>"<\/span><\/span>\nformatted_title <\/span>=<\/span> <\/span>"<\/span>{<\/span>:^20<\/span>}<\/span>"<\/span>.format(title)<\/span><\/span>\nprint<\/span>(formatted_title)<\/span><\/span>\n<\/span><\/code><\/pre>Python<\/span><\/div>\n\n\n\n<\/p>\n\n\n\n
In this snippet, the ^<\/code> symbol aligns the title to the center within a width of 20 characters.<\/p>\n\n\n\nCombining Multiple Values<\/strong><\/p>\n\n\n\nFormat strings become even more powerful when you need to combine multiple values into a single string. The format()<\/code> The method allows you to do this seamlessly:<\/p>\n\n\n\n<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>first_name <\/span>=<\/span> <\/span>"<\/span>John<\/span>"<\/span><\/span>\nlast_name <\/span>=<\/span> <\/span>"<\/span>Doe<\/span>"<\/span><\/span>\nfull_name <\/span>=<\/span> <\/span>"<\/span>