[Python] Cannot get a list to be iterated. I'm sing a program that cannot import the NumPy...

I have used the following code:

import math
import decimal
def calculate_c(a, h):
return (1 * 15 * (4 * (h ** (3/2))) ) / (3 * (a ** (1/2)))
def calculate_d(a, h, u):
return 2 * ((u * h) - ((1/3) * a * (u ** 3)))
def calculate_F(a, u):
return ((math.arcsinh(2 * abs(a) * u) / (4 * abs(a))) + ((u * np.sqrt((4 * (a ** 2) * (u ** 2)) + 1)) /2))
def calculate_g(F):
return 2 * F * 1.24 * 0.5 * 0.2 * 15
# Definiëren van zoekbereik
def range(x, y, jump):
while x < y:
yield float(x)
x += decimal.Decimal(jump)

h_values = list(range(0, 150, '0.1'))[-1] # h moet kleiner zijn dan 15
a_values = range(0, 100, '0.1') # a mag niet te klein zijn om te voorkomen dat sqrt(h/a) < 7.5


max_c = 0
best_h, best_a = None, None
for h in h_values:
for a in a_values:
u = math.sqrt(h / a)
if u < 7.5:
d = calculate_d(a, h, u)
if d <= 25:
c = calculate_c(a, h)
if c > max_c:
max_c = c
best_h, best_a = h, a

best_u = math.sqrt(best_h / best_a)
best_d = calculate_d(best_a, best_h, best_u)
best_F = calculate_F(best_a, best_u)
best_g = calculate_g(best_F)

print(f'Maximale waarde van c: {max_c}')
print(f'Optimale waarde van h: {best_h}')
print(f'Optimale waarde van a: {best_a}')

print(f'Waarde van u: {best_u}')
print(f'Waarde van d (dwarsdoorsnede): {best_d}')
print(f'Waarde van F: {best_F}')
print(f'Gewicht van de boot (g): {best_g}')


Final prints and explanations with # are in Dutch, this is not important. When I try to run it, I get the following error:

Traceback (most recent call last):
File "", line 25, in
TypeError: 'float' object is not iterable
​

It says it cannot iterate float, but I also tried printing it and it only returned one value. The lines for generating the lists came from this site, but I am not very good at coding and struggle to integrate it into my function. Is there any way to resolve this?

I need the values to be floats.

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