From 4729a35b3b32eea21017cec540ce465f86523d58 Mon Sep 17 00:00:00 2001
From: Mark Harfouche <mark.harfouche@gmail.com>
Date: Sun, 4 Dec 2022 22:29:02 -0500
Subject: [PATCH] Avoid instantiating entire dataset by getting the nbytes in
 an array

Using `.data` accidentally tries to load the whole lazy arrays into
memory.

Sad.
---
 xarray/core/variable.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/xarray/core/variable.py b/xarray/core/variable.py
index bb988392f50..5b11509cd38 100644
--- a/xarray/core/variable.py
+++ b/xarray/core/variable.py
@@ -403,8 +403,9 @@ def nbytes(self) -> int:
         If the underlying data array does not include ``nbytes``, estimates
         the bytes consumed based on the ``size`` and ``dtype``.
         """
-        if hasattr(self.data, "nbytes"):
-            return self.data.nbytes
+        if hasattr(self._data, "nbytes"):
+            print("can do")
+            return self._data.nbytes
         else:
             return self.size * self.dtype.itemsize