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Python: What does the f in the call function(title=f"Hello world", ...) mean?

asked 2023-04-07 21:22:20 +0000

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answered 2023-04-07 21:22:42 +0000

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In the context of a function call in Python, the "f" before a string literal indicates that it is a formatted string literal. Formatted string literals, also known as f-strings, are a way to embed expressions inside string literals, using curly braces {}.

In the example you provided, the f in the function call title=f"Hello world" means that the string "Hello world" is a formatted string literal, and any expressions inside the curly braces {} will be evaluated and replaced with their values. For example, if you had a variable name containing the value "John", you could use an f-string like this:

name = "John"
title = f"Hello, {name}!"
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Asked: 2023-04-07 21:22:20 +0000

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Last updated: Apr 07 '23