用浮点数遍历一个列表，并在数学方程中使用它们

Question

I am trying to iterate over a list with floats and calculate with the items in the lists, but I always get this:

list indices must be integers or slices, not float

as you can see below, there are lists named t , and sdt which have the same length and are both floats:

for i in t:
    if t[i] == t[0] or t[1] or t[2] or t[3]:
        for i in t[0:4]:
            rp1x = r+h
            rp1y = sdt[i] - .5*(l-w)
            print(rp1x, rp1y)

Answer 1

you are trying to use the items from your list as indices, you should use:

my_items = t[0:4]
for item in t:
    if item in my_items:
        for i in my_items:
            rp1x = r+h
            rp1y = sdt[i] - .5*(l-w)
            print(rp1x, rp1y)