def name_error():
    a = 2
    b = 3
    c = a + b
    return c

def type_error():
    a = 2
    b = 3
    c = a + b
    return c

def missing_colon():
    total = 0
    for i in range(10):
        total += i

    return total

def missing_indent():
    my_sum = 0
    my_prod = 0

    for i in range(10):
        my_sum += i
        my_prod *= i

    return my_sum, my_prod

def modify_while_iterating():
    my_list = [0, 1, 0, 2, 0, 3, 0, 4]
    out_list = []
    for i in range(len(my_list)):
        if my_list[i] != 0:
            out_list.append(my_list[i])
    return out_list

def mutable_keys():
    coord_dict = {}
    x_values = [1, 2, 3, 4, 5]
    y_values = [5, 4, 3, 2, 1]

    for i in range(len(x_values)):
        x = x_values[i]
        y = y_values[i]
        coordinates = (x, y)

        coord_dict[coordinates] = (x**2 + y**2)**(.5)
    return coord_dict