__init__.py 文件源码

def _read_data(
        filename, key_conv=str, value_conv=float, key_col=0, value_col=1):
    result = {}
    cols = None
    for count, line in enumerate(
            pkg.resource_stream(__name__, filename), start=1):
        data = _parse_re.match(line.decode('utf-8')).group('data')
        if data:
            data = data.split()
            try:
                if cols is None:
                    cols = len(data)
                elif len(data) != cols:
                    raise ValueError(
                            'Unexpected number of values (expected %d)' % cols)
                key = key_conv(data[key_col])
                value = value_conv(data[value_col])
                if key in result:
                    raise ValueError(
                            'Duplicate definition for group %s' % key)
                result[key] = value
            except (IndexError, ValueError) as e:
                e.args += ('on line %d of %s' % (count, filename),)
                raise
    return result