parsing CSS comments?

pyyyyy.py

import re
x = r"""
/* comment 1 */
/***
  comment 2
***/
/*=================
comment 3
*/
/*comment 4*/
/* comment 5
***/
/*****
 comment 6*/
/* ****
 comment 7*/
/* **** comment 8
*/
/* **** comment 9
*** */
"""
y = re.compile(r'\/\*(?P<inner>.+?)\*\/', flags=re.UNICODE | re.MULTILINE | re.IGNORECASE | re.DOTALL)
z = y.findall(x)
a = [_.splitlines() for _ in z]

def trashline(line):
  l = line.strip()
  if l:
    l0 = l[0]
    if l.count(l0) == len(l):
      return None
    else:
      return line
  return None

def consumer(x):
  xlen = len(x)
  if xlen == 1:
    return x
  elif xlen > 2:
    return x[1:-1] # consume the first line /** ... and the last line *///
  elif xlen == 2:
    if trashline(x[0]) is None:
      return x[1]
    elif trashline(x[1]) is None:
      return x[0]
    else:
      raise ValueError("hmmm1")
  raise ValueError("hmm2")
outs = [consumer(_) for _ in a]