python类parse_duration()的实例源码

def to_python(self, value):
        if value in self.empty_values:
            return None
        if isinstance(value, datetime.timedelta):
            return value
        value = parse_duration(value)
        if value is None:
            raise ValidationError(self.error_messages['invalid'], code='invalid')
        return value

def handle(self, *args, **options):
        now = timezone.now()
        expdate = now - parse_duration(options['exp_time'])

        self.stdout.write("Now: " + now.isoformat())
        self.stdout.write("Exp: " + expdate.isoformat())

        expired = Payment.objects.filter(created__lte=expdate, status='new',
                                         paid_amount=0)

        for p in expired:
            self.stdout.write("Payment #%d (%s): %s" % (p.id, p.user.username, p.created))
            if not options['sim']:
                p.status = 'cancelled'
                p.save()

def to_python(self, value):
        if value in self.empty_values:
            return None
        if isinstance(value, datetime.timedelta):
            return value
        value = parse_duration(value)
        if value is None:
            raise ValidationError(self.error_messages['invalid'], code='invalid')
        return value

def convert_durationfield_value(self, value, expression, connection, context):
        if value is not None:
            value = str(decimal.Decimal(value) / decimal.Decimal(1000000))
            value = parse_duration(value)
        return value

def to_python(self, value):
        if value in self.empty_values:
            return None
        if isinstance(value, datetime.timedelta):
            return value
        value = parse_duration(force_text(value))
        if value is None:
            raise ValidationError(self.error_messages['invalid'], code='invalid')
        return value

def convert_durationfield_value(self, value, expression, connection, context):
        if value is not None:
            value = str(decimal.Decimal(value) / decimal.Decimal(1000000))
            value = parse_duration(value)
        return value

def to_python(self, value):
        if value in self.empty_values:
            return None
        if isinstance(value, datetime.timedelta):
            return value
        value = parse_duration(value)
        if value is None:
            raise ValidationError(self.error_messages['invalid'], code='invalid')
        return value

def to_python(self, value):
        if value in self.empty_values:
            return None
        if isinstance(value, datetime.timedelta):
            return value
        value = parse_duration(value)
        if value is None:
            raise ValidationError(self.error_messages['invalid'], code='invalid')
        return value

def to_python(self, value):
        if value in self.empty_values:
            return None
        if isinstance(value, datetime.timedelta):
            return value
        value = parse_duration(value)
        if value is None:
            raise ValidationError(self.error_messages['invalid'], code='invalid')
        return value

def _sqlite_format_dtdelta(conn, lhs, rhs):
    """
    LHS and RHS can be either:
        - An integer number of microseconds
        - A string representing a timedelta object
        - A string representing a datetime
    """
    try:
        if isinstance(lhs, six.integer_types):
            lhs = str(decimal.Decimal(lhs) / decimal.Decimal(1000000))
        real_lhs = parse_duration(lhs)
        if real_lhs is None:
            real_lhs = backend_utils.typecast_timestamp(lhs)
        if isinstance(rhs, six.integer_types):
            rhs = str(decimal.Decimal(rhs) / decimal.Decimal(1000000))
        real_rhs = parse_duration(rhs)
        if real_rhs is None:
            real_rhs = backend_utils.typecast_timestamp(rhs)
        if conn.strip() == '+':
            out = real_lhs + real_rhs
        else:
            out = real_lhs - real_rhs
    except (ValueError, TypeError):
        return None
    # typecast_timestamp returns a date or a datetime without timezone.
    # It will be formatted as "%Y-%m-%d" or "%Y-%m-%d %H:%M:%S[.%f]"
    return str(out)

def convert_durationfield_value(self, value, expression, connection, context):
        if value is not None:
            value = str(decimal.Decimal(value) / decimal.Decimal(1000000))
            value = parse_duration(value)
        return value