(einsum_str: str)
return "".join(replacer.get(x, x) for x in einsum_str)
Convert the str ``einsum_str`` to contain only the alphabetic characters
    valid for numpy einsum. If there are too many symbols, let the backend
    throw an error.

    Examples
    --------
    >>> oe.parser.convert_to_valid_einsum_chars("Ĥěļļö")
    'cbdda'
Convert the str ``einsum_str`` to contain only the alphabetic characters
    valid for numpy einsum. If there are too many symbols, let the backend
    throw an error.
Convert the str einsum_str to contain only the alphabetic characters valid for numpy einsum . If there are too many symbols let the backend throw an error .
def convert_to_valid_einsum_chars(einsum_str: str) -> str:
    """Convert the str ``einsum_str`` to contain only the alphabetic characters
    valid for numpy einsum. If there are too many symbols, let the backend
    throw an error.

    Examples
    --------
    >>> oe.parser.convert_to_valid_einsum_chars("Ĥěļļö")
    'cbdda'
    """
    symbols = sorted(set(einsum_str) - set(",->"))
    replacer = {x: get_symbol(i) for i, x in enumerate(symbols)}
    return "".join(replacer.get(x, x) for x in einsum_str)
def convert_to_valid_einsum_chars ( einsum_str : str ) -> str : symbols = sorted ( set ( einsum_str ) - set ( ",->" ) ) replacer = { x : get_symbol ( i ) for i , x in enumerate ( symbols ) } return "" . join ( replacer . get ( x , x ) for x in einsum_str )