From 406fc65c8790a2e3088dc880c13716887d7b7c18 Mon Sep 17 00:00:00 2001
From: Debian Science Team <debian-science-maintainers@lists.alioth.debian.org>
Date: Wed, 4 Nov 2020 18:36:11 +0000
Subject: [PATCH] Fix pytables expressions with Python 3.9

ast.Index has been replaced by a bare value, so we need to do the
conversion from Constant to int

Author: Rebecca N. Palmer <rebecca_palmer@zoho.com>
Bug-Debian: https://bugs.debian.org/972015
Forwarded: https://github.com/pandas-dev/pandas/issues/37217


Gbp-Pq: Name python39_compat.patch
---
 pandas/core/computation/pytables.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pandas/core/computation/pytables.py b/pandas/core/computation/pytables.py
index 001eb178..cc9baf88 100644
--- a/pandas/core/computation/pytables.py
+++ b/pandas/core/computation/pytables.py
@@ -425,6 +425,10 @@ class PyTablesExprVisitor(BaseExprVisitor):
             value = value.value
         except AttributeError:
             pass
+        try:
+            slobj = slobj.value
+        except AttributeError:
+            pass
 
         try:
             return self.const_type(value[slobj], self.env)
-- 
2.30.2