<commit_before>import re


class Shipper(object):
    barcode = None
    barcode_pattern = None
    shipper = 'Unknown'

    def __init__(self, barcode):
        self.barcode = barcode

    @property
    def is_valid(self):
        if self.matches_barcode and self.valid_checksum:
            return True
        return False

    @property
    def matches_barcode(self):
        return bool(re.match(self.barcode_pattern, self.barcode))

    @property
    def tracking_number(self):
        return self.barcode

    @property
    def valid_checksum(self):
        return True<commit_msg>Default base class valid_checksum() to False<commit_after>import re


class Shipper(object):
    barcode = None
    barcode_pattern = None
    shipper = 'Unknown'

    def __init__(self, barcode):
        self.barcode = barcode

    @property
    def is_valid(self):
        if self.matches_barcode and self.valid_checksum:
            return True
        return False

    @property
    def matches_barcode(self):
        return bool(re.match(self.barcode_pattern, self.barcode))

    @property
    def tracking_number(self):
        return self.barcode

    @property
    def valid_checksum(self):
        return False
{'fraction_non_alphanumeric': 0.076158940397351, 'fraction_numerical': 0.0, 'mean_word_length': 2.5558823529411763, 'pattern_counts': {'":': 0, '<': 3, '<?xml version=': 0, '>': 3, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '6477358', 'n_tokens_mistral': 364, 'n_tokens_neox': 351, 'n_words': 88}