return value in Python

Question

I would like my function to return 1, 2, or 3 values, in regard to the value of bret and cret. How to do something more clever than this ? :

def myfunc (a, bret=False, cret=False):
  b=0
  c=0
  if bret and cret:
   return a,b,c
  elif bret and not cret:
   return a,b
  elif not bret and cret:
   return a,c
  else:
   return a

Answer 1

How about:

def myfunc(a, bret=False, cret=False):
   ...
   return (a,) + ((b,) if bret else ()) + ((c,) if cret else ())

Answer 2

def myfunc (a, bret=False, cret=False):
  b, c, ret = 0, 0, [a]
  if bret: ret.append(b)
  if cret: ret.append(c)
  return ret