diff -r -u Botan-1.10.17.orig/doc/conf.py Botan-1.10.17/doc/conf.py
--- Botan-1.10.17.orig/doc/conf.py	2017-10-02 09:00:00.000000000 +0300
+++ Botan-1.10.17/doc/conf.py	2021-10-17 09:59:02.300020295 +0300
@@ -40,10 +40,10 @@
 def check_sphinx_version():
     import sphinx
 
-    version = map(int, sphinx.__version__.split('.'))
+    version = list(map(int, sphinx.__version__.split('.')))
     if version[0] == 1 and version[1] == 0 and version[2] < 7:
         # Exit rather than throwing to avoid a confusing backtrace
-        print "This Sphinx is too old - upgrade to at least 1.0.7"
+        print("This Sphinx is too old - upgrade to at least 1.0.7")
         import sys
         sys.exit(1)