Function argument

Q: How deeply does The Well-Grounded Python Developer: How the pros use Python and Flask cover function argument?

Defines arguments and parameters, then demonstrates positional, keyword, variadic, and default arguments through print.

As explained in The Well-Grounded Python Developer: How the pros use Python and Flask

An argument is a value supplied to a function or method when it is called.

A function argument is a value supplied when a function or method is called. The function receives that value through a parameter, the name defined in its interface. section 3.1.2

Arguments can be positional or keyword-based. Their order and names form part of an API’s contract, so clear calls make code easier to use and maintain. section 3.1.2

Passing one or several values

Calling print("Hello World") passes one argument. Calling print("Hello", "World") passes two positional arguments, which print outputs with its default space separator. section 3.1.2

print(*objects, sep=' ', end='\n', file=sys.stdout, flush=False)

Inspect print’s signature to see its positional object arguments and configurable keyword arguments, including sep, end, file, and flush. section 3.1.2

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Also explained in

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A Pythonic Adventure: From Python basics to a working web appA function argument is a value supplied to a function call for the function to operate on.
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The Well-Grounded Rubyist, Fourth EditionA Ruby argument is a value supplied to a method call and is distinct from a supplied block.
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Python Workout, Second EditionA function argument is a value supplied to a function call for use by the corresponding parameter.
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Statistics Slam DunkA function argument is an input value supplied to a function when it is invoked.

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Related concepts

function parametercontrasts with · A function parameter is a named input declared in a function definition that receives a corresponding argument value when the function is called.
inputcontrasts with · An input is a value, information, or signal supplied to a system, computation, or interface for processing or to influence its behavior.
functionused by · A function is a callable program unit that performs an operation, may accept inputs, and can produce a result or side effect.
rest operatorused by · In JavaScript, rest syntax uses three dots to collect remaining function arguments, array elements, or object properties into a single binding.
callused by · A function call is an operation or expression that invokes a function or other callable, optionally supplies arguments, and initiates its execution.
higher-order functionused by · A higher-order function is a function that accepts functions as arguments, returns functions as results, or both.

This explainer was generated by Manning's knowledge graph from the text of The Well-Grounded Python Developer: How the pros use Python and Flask. The section links point to the parts of the book it draws on.