X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/46a6199f3a40a24ee145adc390500190b17a6395..787fdb3943a9189486fc0ad95a460180a2469e31:/sdk/python/arvados/_ranges.py

diff --git a/sdk/python/arvados/_ranges.py b/sdk/python/arvados/_ranges.py
index 83437b2adb..83874164ee 100644
--- a/sdk/python/arvados/_ranges.py
+++ b/sdk/python/arvados/_ranges.py
@@ -6,6 +6,8 @@ _logger = logging.getLogger('arvados.ranges')
 RANGES_SPAM = 9
 
 class Range(object):
+    __slots__ = ("locator", "range_start", "range_size", "segment_offset")
+
     def __init__(self, locator, range_start, range_size, segment_offset=0):
         self.locator = locator
         self.range_start = range_start
@@ -53,6 +55,8 @@ def first_block(data_locators, range_start):
     return i
 
 class LocatorAndRange(object):
+    __slots__ = ("locator", "block_size", "segment_offset", "segment_size")
+
     def __init__(self, locator, block_size, segment_offset, segment_size):
         self.locator = locator
         self.block_size = block_size