From cf7aeb47195b4d37107e4e7aed5839344a96cb45 Mon Sep 17 00:00:00 2001
From: Junpeng Lao <junpenglao@gmail.com>
Date: Mon, 6 Jul 2020 16:27:51 +0200
Subject: [PATCH 1/5] Revert "Drop support for py3.6 (#3992)"

This reverts commit 1bf867edf74e1c5fc0db79a4f0ca4e2bdab94e66.
---
 RELEASE-NOTES.md             | 2 --
 scripts/install_miniconda.sh | 2 +-
 setup.py                     | 1 +
 3 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/RELEASE-NOTES.md b/RELEASE-NOTES.md
index e17392a97fd..c678272efbc 100644
--- a/RELEASE-NOTES.md
+++ b/RELEASE-NOTES.md
@@ -1,8 +1,6 @@
 # Release Notes
 
 ## PyMC3 3.9.x (on deck)
-This release [does not support Python 3.6 anymore](https://numpy.org/neps/nep-0029-deprecation_policy.html). Use Python 3.7 or higher.
-
 ### Documentation
 - Notebook on [multilevel modeling](https://docs.pymc.io/notebooks/multilevel_modeling.html) has been rewritten to showcase ArviZ and xarray usage for inference result analysis (see [#3963](https://github.com/pymc-devs/pymc3/pull/3963))
 
diff --git a/scripts/install_miniconda.sh b/scripts/install_miniconda.sh
index 61d27943d0c..b4035f45280 100755
--- a/scripts/install_miniconda.sh
+++ b/scripts/install_miniconda.sh
@@ -7,7 +7,7 @@ if conda --version > /dev/null 2>&1; then
    exit 0
  fi
 
-PYTHON_VERSION=${PYTHON_VERSION:-3.7} # if no python specified, use 3.7
+PYTHON_VERSION=${PYTHON_VERSION:-3.6} # if no python specified, use 3.6
 
 if [ ${PYTHON_VERSION} == "2.7" ]; then
   INSTALL_FOLDER="$HOME/miniconda2"
diff --git a/setup.py b/setup.py
index eef672998a6..a09b70515ec 100755
--- a/setup.py
+++ b/setup.py
@@ -29,6 +29,7 @@
     "Development Status :: 5 - Production/Stable",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.6",
     "Programming Language :: Python :: 3.7",
     "Programming Language :: Python :: 3.8",
     "License :: OSI Approved :: Apache Software License",

From 0cd96d1bfff90016cd87ca14872bf1f3abd87a8f Mon Sep 17 00:00:00 2001
From: Junpeng Lao <junpenglao@gmail.com>
Date: Mon, 6 Jul 2020 16:30:46 +0200
Subject: [PATCH 2/5] Update README.rst

---
 README.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.rst b/README.rst
index 8549942787e..1effc2ca83f 100644
--- a/README.rst
+++ b/README.rst
@@ -111,7 +111,7 @@ Another option is to clone the repository and install PyMC3 using
 Dependencies
 ============
 
-PyMC3 is tested on Python 3.7 and depends on Theano, NumPy,
+PyMC3 is tested on Python 3.6 and depends on Theano, NumPy,
 SciPy, and Pandas (see ``requirements.txt`` for version
 information).
 

From eda63cf7ea1c7160672498776e63b36e6d35d6f8 Mon Sep 17 00:00:00 2001
From: Junpeng Lao <junpenglao@gmail.com>
Date: Mon, 6 Jul 2020 16:31:35 +0200
Subject: [PATCH 3/5] Update setup.py

---
 setup.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/setup.py b/setup.py
index a09b70515ec..b7cda72df32 100755
--- a/setup.py
+++ b/setup.py
@@ -81,7 +81,7 @@ def get_version():
         # package_data={'docs': ['*']},
         include_package_data=True,
         classifiers=classifiers,
-        python_requires=">=3.7",
+        python_requires=">=3.6",
         install_requires=install_reqs,
         tests_require=test_reqs,
         test_suite="nose.collector",

From 9454f1c6d600bcfde3aec60f157598d8d1cf9bf0 Mon Sep 17 00:00:00 2001
From: Junpeng Lao <junpenglao@gmail.com>
Date: Mon, 6 Jul 2020 16:42:04 +0200
Subject: [PATCH 4/5] Update requirements.txt

---
 requirements.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/requirements.txt b/requirements.txt
index c75496b7e5a..9cc32676b4e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,3 +7,4 @@ patsy>=0.5.1
 fastprogress>=0.2.0
 h5py>=2.7.0
 typing-extensions>=3.7.4
+dataclasses; python_version < '3.7'

From a2344ccbc57d343c46afbd1790db995264e8a85d Mon Sep 17 00:00:00 2001
From: Junpeng Lao <junpenglao@gmail.com>
Date: Mon, 6 Jul 2020 19:52:03 +0200
Subject: [PATCH 5/5] Update requirements.txt

Co-authored-by: Adrian Seyboldt <aseyboldt@users.noreply.github.com>
---
 requirements.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/requirements.txt b/requirements.txt
index 9cc32676b4e..15c2df01e4d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,3 +8,4 @@ fastprogress>=0.2.0
 h5py>=2.7.0
 typing-extensions>=3.7.4
 dataclasses; python_version < '3.7'
+contextvars; python_version < '3.7'