Requires:
- A name
- Arguments
- Actions
- Return type (optional)
Optional Arguments
somefunction([, optionalargument])
Square brackets mean this argument is optional. You don’t need to provide it.
Square brackets are nested, if you have multiple optional arguments
somefunction(arg1, [, arg2 [,arg3]])
Alternatively:
somefunction(optionalargument = None)
Positional Arguments
func(a,b, /, c, d)
The / specifies that a and b are positional arguments.