def __init__(self, do_lower_case):
        """Constructs a BasicTokenizer.
        Args:
            do_lower_case: Whether to lower case the input.
        """
        if do_lower_case == "true":
            self.do_lower_case = True
        else:
            self.do_lower_case = False
Constructs a BasicTokenizer.
        Args:
            do_lower_case: Whether to lower case the input.
        
uer/utils/tokenizers.py