def string_to_env(string: str):
    """
    Overview:
        Turn string ``KEY=VALUE`` to key-value tuple.

    Arguments:
        - string (:obj:`str`): Original key-value string.

    Returns:
        - (key, value): key and value

    Examples::
        >>> from pyspj.utils import string_to_env
        >>> string_to_env('THIS=1')
        ('THIS', '1')
        >>> string_to_env('THIS=1=2')
        ('THIS', '1=2')
    """
    _name, _value = string.split('=', maxsplit=1)
    return _name, _value