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Mastering Python: Annotations, Errors and Environment
Mastering Python: Annotations, Errors and Environment
Arbitrary Arguments (*args)
In Python, the *args
syntax is used to pass a varying number of arguments to a function. The *args
parameter allows you to pass any number of positional arguments to a function, and it collects them into a tuple.
Let's implement the multiply()
function that can accept a variable number of arguments:
The function multiply()
accepts a variable number of arguments using the syntax *args
. The arguments are then stored in a tuple called args. We can use a loop to multiply all the arguments together, as shown below:
Now, you can see that our function works with no arguments as well as with many arguments.
Note
The parameter
*args
is commonly referred to as variable-length argument or arbitrary argument list.
If we need a function that should take from one/two/... to many arguments, a combination of positional arguments and arbitrary arguments, such as *args
.
In the example above, you can see that our function returned 150 when called with 2 or more arguments and raised a TypeError when called with fewer than 2 arguments.
It is important to note that the positional arguments should be defined before the optional arguments:
Tudo estava claro?