Getting an unexpected generator object ?

[mcgrim]

Thanks,

I am also trying to graph the error vs h with a loglog function, but I have two separate issues.
loglog is not recognized and when I omit it, the graph I obtain is empty.

from scipy import *
import numpy as np
from numpy import array
from scipy import integrate
import matplotlib.pyplot as plt

a=0
b=1
n=500
h=(b-a)/(n)
 
def f(x):
    return x**2
 
def trapezoidal(f,a,b,n):
    return (h/2)*(f(a)+f(b))+h*( sum(f(a+h*i)  for i in range(1, (n-1))))
 
print(trapezoidal(f,a,b,n))
 
# Why this?
lambda x: f(x)
 
c= integrate.quad(f,0,1)
print(c)
 
error=(abs(trapezoidal(f,a,b,n)-c[0]) for n in range (300,900))
print(list(error))
plt.plot((list(error),list(h)) for n in range (300,900))