More about functions when using Python for data scince

In Python, functions are an

1. More about Python functions Xing Fang

2. Arguments Numbers, strings, tuples are pass by value. Lists and dictionaries are pass by reference (pointer).

3. Pass by value

4. Pass by reference

5. Pass by value and by reference

6. Default arguments A default parameter (argument) is the one that has a value assigned to it when the function is defined. The value is referred to as the default value.

7. Default arguments To define a function that takes both default and non-default arguments, make sure to define the default ones after the non-default ones.

8. Python function calls Passing arguments by their positions Passing arguments by key words

9. The return statement Since Python functions do not have return types, the return statement is optional. Python functions can return multiple values as a tuple:

10. The return statement It requires us to use the same amount of variables to hold the returned values.