Indentation and White Space

White space is not ignored and is part of the syntax.
Blank lines are ignored, even when they are inside indented blocks.

Indentation

Indentation refers to the spaces at the beginning of a code line and is absolutely essential.
Where in other programming languages the indentation in code is for readability only, the indentation in Python is very important.
There are no curly brackets - indentation is used instead
Python uses indentation to indicate a block of code.
Python will give you an error if you skip the indentation.
Indentation - every indented block is indented by 4 spaces

def adjust_price(price: float, age: int) -> float: 
    if age > 60: 
        return price * .8 
    else: 
        return price 
assert_equal(adjust_price(5.75, 63), 4.60) 
assert_equal(adjust_price(5.75, 45), 5.75) 

Vertical Alignment

res = function_name(var_one, var_two, 
                    var_three, var_four) 

Hanging Indent

res = function_name( 
    var_one, var_two, 
    var_three, var_four) 

Additional Indentation

res = function_name( 
        var_one, var_two, 
        var_three, var_four) 
    print(var_one) 

if(this_one 
        and that_one): 
    dosomething() 

"and" is an operator and a keyword

Square Brackets

my_list = [ 
    1, 2, 3, 
    4, 5, 6, 
] 

Parentheses

res = function_name( 
    'a', 'b', 'c',
)