Python Terminal Snow

Got this cool script over at Sontek's gist account. Here's the script:
[sourcecode language="python"]
#!/usr/bin/env python
import os
import random
import time
import platform

snowflakes = {}

try:
# Windows Support
from colorama import init
init()
except ImportError:
pass

def get_terminal_size():
def ioctl_GWINSZ(fd):
try:
import fcntl
import termios
import struct
cr = struct.unpack('hh', fcntl.ioctl(fd, termios.TIOCGWINSZ,
'1234'))
except:
return None
return cr

cr = ioctl_GWINSZ(0) or ioctl_GWINSZ(1) or ioctl_GWINSZ(2)

if not cr:
try:
fd = os.open(os.ctermid(), os.O_RDONLY)
cr = ioctl_GWINSZ(fd)
os.close(fd)
except:
pass
if not cr:
try:
cr = (os.environ['LINES'], os.environ['COLUMNS'])
except:
cr = (25, 80)
return int(cr[1]), int(cr[0])

columns, rows = get_terminal_size()

def clear_screen(numlines=100):
"""Clear the console.

numlines is an optional argument used only as a fall-back.
"""
if os.name == "posix":
# Unix/Linux/MacOS/BSD/etc
os.system('clear')
elif os.name in ("nt", "dos", "ce"):
# DOS/Windows
os.system('cls')
else:
# Fallback for other operating systems.
print('\n' * rows)

def get_random_flake():
if not platform.system() == 'Windows':
try:
# python3 support
try:
cmd = unichr
except NameError:
cmd = chr

flake = cmd(random.choice(range(0x2740, 0x2749)))

return flake
except:
pass

return " *"

def move_flake(col):
if snowflakes[col][0]+1 == rows:
snowflakes[col] = [1, get_random_flake()]
else:
print("\033[%s;%sH " % (snowflakes[col][0], col))

snowflakes[col][0] += 1

print("\033[%s;%sH%s" % (snowflakes[col][0], col, snowflakes[col][1]))

print("\033[1;1H")

if __name__ == "__main__":

clear_screen()

while True:
col = random.choice(range(1, int(columns)))

# its already on the screen, move it
if col in snowflakes.keys():
move_flake(col)
else:
# otherwise put it on the screen
flake = get_random_flake()
snowflakes[col] = [1, flake]

print("\033[%s;%sH%s" % (snowflakes[col][0], col,
snowflakes[col][1]))

# key any flakes on the screen moving
for flake in snowflakes.keys():
move_flake(flake)

time.sleep(0.1)
[/sourcecode]

And a short clip of it in action, Happy Holidays [:

http://youtu.be/z4kWzOHyk_g