RaspberryPi SenseHat crypto change 24H

#!/usr/bin/env python

from sense_hat import SenseHat
import datetime
from time import sleep
import requests
import signal
import os

sense = SenseHat()

# Clear HAT on CTRL+C
def signal_handler(signal, frame):
  sense.clear()
  os._exit(0)

signal.signal(signal.SIGINT, signal_handler)

# Draw pixel array
def draw(pixel_array):
  sense.set_pixels(pixel_array)

# Gather crypto values from API
def get_crypto_values():
  url = "https://api.coingecko.com/api/v3/coins"
  params = dict(
    per_page = '64',
    page = '1',
    order = 'market_cap_desc'
  )

  resp = requests.get(url=url, params=params)
  return resp.json()

# Parse json into array of int (percentage)
def parse_crypto_json (json):
  cryptos = []
  
  for crypto in json:
    cryptos.append(int(float(crypto['market_data']['price_change_percentage_24h'])))

  print("Average change is {}%".format(reduce(lambda x, y: x + y, cryptos) / len(cryptos)))
  return cryptos

# Transalate a value from a range to another
def change_range (OldMin, OldMax, NewMin, NewMax, OldValue):
  OldRange = (OldMax - OldMin)  
  NewRange = (NewMax - NewMin)  
  NewValue = (((OldValue - OldMin) * NewRange) / OldRange) + NewMin

  return NewValue

# Translate a percentage to a color
def get_color_from_percent (percent):
  MAX = 10
  MIN = -10
  if percent > MAX:
    percent = MAX
  
  if percent < MIN:
    percent = MIN

  n = change_range(MIN, MAX, 0, 100, percent)
  R = 255 - (255 * n / 100)
  G = 255 * n / 100
  B = 0
  
  return (R, G, B)

# Translate array of int into array of color
def percent_to_color (percent_array):
  array = []

  for percent in percent_array:
    array.append(get_color_from_percent(percent))
  
  return array  

# Prevent my eye from burning
# Turn off between min and max 
def check_time():
 now = datetime.datetime.now()

 min = now.replace(hour=7, minute=0, second=0)
 max = now.replace(hour=23, minute=59, second=59, microsecond=0)

 return (now > min) and (now < max)

def main ():
  if (not check_time()):
    sense.clear()
    return
    
  json = get_crypto_values()

  crypto_changes = parse_crypto_json(json)
  
  colors = percent_to_color(crypto_changes)

  draw(colors)

if __name__ == "__main__":
  while True: 
    main()
    sleep(60) # Update every 1 min