How can I convert my python code with for loop into the code with while loop?

Question

def H(f, a, b,samples,M):


    c = np.zeros((M, samples))

    d = a+(b-a)*np.random.random(size=(M))
    for n in range(samples):


        c[:,n]=g(d)
        e = a + (b-a)*np.random.random(size=(M))
        f = w(e)/w(d)
        bigger_1 = np.nonzero(f>1)[0]
        f[bigger_1] = np.ones(len(bigger_1))
        cond = f > np.random.random(size=(M))
        d = e*cond+d*(1-cond)
        
    c = convert_x_to_z(b)*c
    h = np.sum(c,axis=1)/samples
    return h, np.sum(h)/M

here is my original code

In the following ,it is my trivial but it cannot work properly

def H(f, a, b,samples,M):


    c = np.zeros((M, samples))

    d = a+(b-a)*np.random.random(size=(M))
    i=0
    while i < len((samples)):
        n=samples[i]
        i=i+1
        c[:,n]=g(d)
        e = a + (b-a)*np.random.random(size=(M))
        f = w(e)/w(d)
        bigger_1 = np.nonzero(f>1)[0]
        f[bigger_1] = np.ones(len(bigger_1))
        cond = f > np.random.random(size=(M))
        d = e*cond+d*(1-cond)
        
    c = convert_x_to_z(b)*c
    h = np.sum(c,axis=1)/samples
    return h, np.sum(h)/M

it says that TypeError: object of type 'int' has no len(). Can you guys help me to fix it?Thx!

Answer 1

Look at the difference between the two loops:

for n in range(samples):

vs

while i < len((samples)):

what type is samples? Good luck!