It was a pretty simple issue; you gave a larger color before a smaller one to cv.inRange, so there was no valid intersection! Here's some working code that shows the output. This should be easy to adapt into your own script.

import cv2 as cv
import numpy as np
import matplotlib.pyplot as plt

img = cv.imread('shuttle.jpg')   # you can read in images with opencv
img_hsv = cv.cvtColor(img, cv.COLOR_BGR2HSV)

hsv_color1 = np.asarray([0, 0, 255])   # white!
hsv_color2 = np.asarray([30, 255, 255])   # yellow! note the order

mask = cv.inRange(img_hsv, hsv_color1, hsv_color2)

plt.imshow(mask, cmap='gray')   # this colormap will display in black / white
plt.show()