Resolved: Saving data in csv file in Python

import numpy as np
import csv
N=2
Pe = np.array([[[128.22918457, 168.52413295, 209.72343319],
        [129.01598287, 179.03716051, 150.68633749],
        [131.00688309, 187.42601593, 193.68172751]],

       [[ 64.11459228,  84.26206648, 104.86171659],
        [ 64.50799144,  89.51858026,  75.34316875],
        [ 65.50344155,  93.71300796,  96.84086375]]])

with open('Test123.csv', 'w') as f: 
    for x in range(0,N): 
        print([Pe[x]]) 
        writer = csv.writer(f)
        # write the data 
        writer.writerows(zip(x,Pe[x]))

TypeError: 'int' object is not iterable

with open('Test123.csv', 'w') as f:
    for x in range(0 ,N):
        print([Pe[x]])
        writer = csv.writer(f)
        # write the data
        header = [x] * len(Pe[x])
        # header = [x] + ['']*(len(Pe[x])-1)
        writer.writerows(zip(header, Pe[x]))