From 08893e74c12c2cb3c4ac9907b5f96c30b5220388 Mon Sep 17 00:00:00 2001
From: James Bourbeau <jrbourbeau@gmail.com>
Date: Tue, 9 May 2023 11:56:23 -0500
Subject: [PATCH 1/3] Run CI against multiple Python versions

---
 .github/workflows/test.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 88d5e9232..30e95a5e6 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -18,6 +18,11 @@ defaults:
 jobs:
   test:
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ["3.9", "3.10", "3.11"]
+
     steps:
       - uses: actions/checkout@v2
 
@@ -26,6 +31,8 @@ jobs:
         with:
           environment-file: ci/environment.yml
           environment-name: dask-match
+          extra-specs: |
+            python=${{ matrix.python-version }}
 
       - name: Install Dask-Match
         run: python -m pip install -e . --no-deps

From 66900ec453e74f90eb413102549a583eec7336fc Mon Sep 17 00:00:00 2001
From: James Bourbeau <jrbourbeau@gmail.com>
Date: Tue, 9 May 2023 12:03:15 -0500
Subject: [PATCH 2/3] Fixup

---
 dask_expr/collection.py | 2 ++
 dask_expr/expr.py       | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/dask_expr/collection.py b/dask_expr/collection.py
index 177da760c..e1ab97b27 100644
--- a/dask_expr/collection.py
+++ b/dask_expr/collection.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import functools
 
 import numpy as np
diff --git a/dask_expr/expr.py b/dask_expr/expr.py
index 8485f8dbb..3cd4ce790 100644
--- a/dask_expr/expr.py
+++ b/dask_expr/expr.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import functools
 import numbers
 import operator

From e6ecd5cf4607c6c142c57daab132bd23613eeb8b Mon Sep 17 00:00:00 2001
From: James Bourbeau <jrbourbeau@gmail.com>
Date: Tue, 9 May 2023 12:06:08 -0500
Subject: [PATCH 3/3] Lint

---
 dask_expr/expr.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dask_expr/expr.py b/dask_expr/expr.py
index 3cd4ce790..b8617c021 100644
--- a/dask_expr/expr.py
+++ b/dask_expr/expr.py
@@ -417,7 +417,7 @@ def __dask_graph__(self):
     def __dask_keys__(self):
         return [(self._name, i) for i in range(self.npartitions)]
 
-    def substitute(self, substitutions: dict) -> "Expr":
+    def substitute(self, substitutions: dict) -> Expr:
         """Substitute specific `Expr` instances within `self`
 
         Parameters