How do you add an optional argument in Python?
You can define Python function optional arguments by specifying the name of an argument followed by a default value when you declare a function. You can also use the **kwargs method to accept a variable number of arguments in a function.
What is keyword argument in Python?
A keyword argument is where you provide a name to the variable as you pass it into the function. One can think of the kwargs as being a dictionary that maps each keyword to the value that we pass alongside it. That is why when we iterate over the kwargs there doesn’t seem to be any order in which they were printed out.
What to do when you omit optional parameters?
When you omit one or more optional arguments in the argument list, you use successive commas to mark their positions. The following example call supplies the first and fourth arguments but not the second or third: The following example makes several calls to the MsgBox function. MsgBox has one required parameter and two optional parameters.
How to add optional arguments to an OBJ function?
Try calling it like: obj.some_function ( ‘1’, 2, ‘3’, g=”foo”, h=”bar” ). After the required positional arguments, you can specify specific optional arguments by name. Just use the *args parameter, which allows you to pass as many arguments as you want after your a,b,c.
Are there any drawbacks to specifiy optional arguments?
The drawback to this method is when the default value is complex (requiring multiple lines of code), then it would probably reduce readability to try to put all that into the default value and the missing or NULL approaches become much more reasonable.
When to use COMMAS to mark optional arguments?
When you omit one or more optional arguments in the argument list, you use successive commas to mark their positions. The following example call supplies the first and fourth arguments but not the second or third: The following example makes several calls to the MsgBox function.