parameters: (palette)
return_statement: return p
docstring: Check a palette argument (to the :class:`Writer` class) for validity.
      Returns the palette as a list if okay; raises an exception otherwise.
docstring_summary: Check a palette argument (to the :class:`Writer` class) for validity.
      Returns the palette as a list if okay; raises an exception otherwise.
docstring_tokens: Check a palette argument ( to the : class : Writer class ) for validity . Returns the palette as a list if okay ; raises an exception otherwise .
function: def check_palette(palette):
      """Check a palette argument (to the :class:`Writer` class) for validity.
      Returns the palette as a list if okay; raises an exception otherwise.
      """
  
      # None is the default and is allowed.
      if palette is None:
          return None
  
      p = list(palette)
      if not (0 < len(p) <= 256):
          raise ValueError("a palette must have between 1 and 256 entries")
      seen_triple = False
      for i,t in enumerate(p):
          if len(t) not in (3,4):
              raise ValueError(
                "palette entry %d: entries must be 3- or 4-tuples." % i)
          if len(t) == 3:
              seen_triple = True
          if seen_triple and len(t) == 4:
              raise ValueError(
                "palette entry %d: all 4-tuples must precede all 3-tuples" % i)
          for x in t:
              if int(x) != x or not(0 <= x <= 255):
                  raise ValueError(
                    "palette entry %d: values must be integer: 0 <= x <= 255" % i)
      return p
function_tokens: def check_palette ( palette ) : # None is the default and is allowed. if palette is None : return None p = list ( palette ) if not ( 0 < len ( p ) <= 256 ) : raise ValueError ( "a palette must have between 1 and 256 entries" ) seen_triple = False for i , t in enumerate ( p ) : if len ( t ) not in ( 3 , 4 ) : raise ValueError ( "palette entry %d: entries must be 3- or 4-tuples." % i ) if len ( t ) == 3 : seen_triple = True if seen_triple and len ( t ) == 4 : raise ValueError ( "palette entry %d: all 4-tuples must precede all 3-tuples" % i ) for x in t : if int ( x ) != x or not ( 0 <= x <= 255 ) : raise ValueError ( "palette entry %d: values must be integer: 0 <= x <= 255" % i ) return p