Coordinates in all of these color spaces are floating point values. In the YIQ space, the Y coordinate is between 0 and 1, but the I and Q coordinates can be positive or negative. In all other spaces, the coordinates are all between 0 and 1.

https://docs.python.org/3/library/colorsys.html

You must scale from [0, 255] to [0, 1], or divide your RGB values with 255. If using python 2 make sure not to do floor division.

Here is an example code inspired by Pillow's getcolor.

from colorsys import rgb_to_hsv

def to_hsv(r, g, b):
  h, s, v = rgb_to_hsv(r / 255, g / 255, b / 255)
  return int(h * 255), int(s * 255), int(v * 255)

rgb = (47, 207, 227)

# This is one usage, which returns (132, 202, 227).
hsv_example_1 = to_hsv(*rgb)

# This is another usage, which returns (132, 202, 227).
hsv_example_2 = to_hsv(rgb[0], rgb[1], rgb[2])