util.py 文件源码

def unicode_iter(val):
    """Provides an iterator over the *code points* of the given Unicode sequence.

    Notes:
        Before PEP-393, Python has the potential to support Unicode as UTF-16 or UTF-32.
        This is reified in the property as ``sys.maxunicode``.  As a result, naive iteration
        of Unicode sequences will render non-character code points such as UTF-16 surrogates.

    Args:
        val (unicode): The unicode sequence to iterate over as integer code points in the range
            ``0x0`` to ``0x10FFFF``.
    """
    val_iter = iter(val)
    while True:
        code_point = next(_next_code_point(val, val_iter, to_int=ord))
        if code_point is None:
            raise ValueError('Unpaired high surrogate at end of Unicode sequence: %r' % val)
        yield code_point