Python 3: Type annotations not supported

[miracle2k]

>>> source_code_string = """
... def foo(x: number):
...     pass
... """
>>>
>>> fst = parse(source_code_string)
baron.parser.ParsingError: Error, got an unexpected token COLON here:

   1
   2 def foo(x: <---- here

The token COLON should be one of those: COMMA, DOUBLE_STAR, LEFT_PARENTHESIS, NAME, RIGHT_PARENTHESIS, STAR

[flycash]

type annotation not support for:
a: str="hello"
The error information is:
baron.parser.ParsingError: Error, got an unexpected token COLON here:
1 a:<---- here
The token COLON should be one of those: AMPER, AMPER_EQUAL, AND, AT, AT_EQUAL, CIRCUMFLEX, CIRCUMFLEX_EQUAL, COMMA, COMMENT, DEF, DOT, DOUBLE_SLASH, DOUBLE_SLASH_EQUAL, DOUBLE_STAR, DOUBLE_STAR_EQUAL, ENDL, EQUAL, EQUAL_EQUAL, FOR, GREATER, GREATER_EQUAL, IF, IN, IS, LEFT_PARENTHESIS, LEFT_SHIFT, LEFT_SHIFT_EQUAL, LEFT_SQUARE_BRACKET, LESS, LESS_EQUAL, MINUS, MINUS_EQUAL, NOT, NOT_EQUAL, OR, PERCENT, PERCENT_EQUAL, PLUS, PLUS_EQUAL, RIGHT_SHIFT, RIGHT_SHIFT_EQUAL, SEMICOLON, SLASH, SLASH_EQUAL, SPACE, STAR, STAR_EQUAL, VBAR, VBAR_EQUAL, WITH