get_readable_filesize(size) -> filesize -- return human readable 
	filesize from given size in bytes.

def get_readable_filesize(size):
	"""get_readable_filesize(size) -> filesize -- return human readable 
	filesize from given size in bytes.
	"""
	if(size < 1024):
		return str(size)+' bytes'
	temp = size/1024.0
	level = 1
	while(temp >= 1024 and level< 3):
		temp = temp/1024
		level += 1
	if(level == 1):
		return str(round(temp,2))+' KB'
	elif(level == 2):
		return str(round(temp,2))+' MB'
	else:
		return str(round(temp,2))+' GB'