parameters: (self, declarations_str: str)
docstring: Generates (prop, value) pairs from declarations.
  
          In a future version may generate parsed tokens from tinycss/tinycss2
  
          Parameters
          ----------
          declarations_str : str
docstring_summary: Generates (prop, value) pairs from declarations.
docstring_tokens: Generates ( prop value ) pairs from declarations .
function: def parse(self, declarations_str: str):
          """
          Generates (prop, value) pairs from declarations.
  
          In a future version may generate parsed tokens from tinycss/tinycss2
  
          Parameters
          ----------
          declarations_str : str
          """
          for decl in declarations_str.split(";"):
              if not decl.strip():
                  continue
              prop, sep, val = decl.partition(":")
              prop = prop.strip().lower()
              # TODO: don't lowercase case sensitive parts of values (strings)
              val = val.strip().lower()
              if sep:
                  yield prop, val
              else:
                  warnings.warn(
                      f"Ill-formatted attribute: expected a colon in {repr(decl)}",
                      CSSWarning,
                  )
function_tokens: def parse ( self , declarations_str : str ) : for decl in declarations_str . split ( ";" ) : if not decl . strip ( ) : continue prop , sep , val = decl . partition ( ":" ) prop = prop . strip ( ) . lower ( ) # TODO: don't lowercase case sensitive parts of values (strings) val = val . strip ( ) . lower ( ) if sep : yield prop , val else : warnings . warn ( f"Ill-formatted attribute: expected a colon in {repr(decl)}" , CSSWarning , )