--- theano/printing.py.orig	2020-11-14 20:22:36.000000000 -0700
+++ theano/printing.py	2020-11-23 16:00:21.019907292 -0700
@@ -1358,7 +1358,7 @@ def hex_digest(x):
     Returns a short, mostly hexadecimal hash of a numpy ndarray
     """
     assert isinstance(x, np.ndarray)
-    rval = hashlib.sha256(x.tostring()).hexdigest()
+    rval = hashlib.sha256(x.tobytes()).hexdigest()
     # hex digest must be annotated with strides to avoid collisions
     # because the buffer interface only exposes the raw data, not
     # any info about the semantics of how that data should be arranged