From e5acee09abb3e291fc6b3b48c3655648422cad40 Mon Sep 17 00:00:00 2001
From: Clemens Neudecker <952378+cneud@users.noreply.github.com>
Date: Thu, 17 Aug 2023 21:05:51 +0200
Subject: [PATCH 1/4] cap tensorflow version to <2.12.0

Cap tensorflow version to <2.12.0 until we have time to adapt to the API changes such as e.g.
* Support for Python 3.11 has been added.
* Support for Python 3.7 has been removed.
See also https://github.com/tensorflow/tensorflow/releases/tag/v2.12.0.
---
 requirements.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/requirements.txt b/requirements.txt
index 0180d01..0d7c5b2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 # ocrd includes opencv, numpy, shapely, click
 ocrd >= 2.23.3
 scikit-learn >= 0.23.2
-tensorflow >= 2.4.0
+tensorflow >= 2.4.0, <2.12.0
 imutils >= 0.5.3
 matplotlib
 setuptools >= 50

From 935332e86352b86453cdc61fcd548f484a5d3ae3 Mon Sep 17 00:00:00 2001
From: Clemens Neudecker <952378+cneud@users.noreply.github.com>
Date: Thu, 17 Aug 2023 21:45:48 +0200
Subject: [PATCH 2/4] test fix for keras.backend import error with Python 3.8

---
 qurator/eynollah/eynollah.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/qurator/eynollah/eynollah.py b/qurator/eynollah/eynollah.py
index ad3f312..57ddcad 100644
--- a/qurator/eynollah/eynollah.py
+++ b/qurator/eynollah/eynollah.py
@@ -29,7 +29,7 @@ warnings.filterwarnings("ignore")
 from scipy.signal import find_peaks
 import matplotlib.pyplot as plt
 from scipy.ndimage import gaussian_filter1d
-from keras.backend import set_session
+from tensorflow.python.keras.backend import set_session
 from tensorflow.keras import layers
 
 from .utils.contour import (

From b58a327c5d53a05ba3142802db27e25dfd7380be Mon Sep 17 00:00:00 2001
From: Clemens Neudecker <952378+cneud@users.noreply.github.com>
Date: Thu, 17 Aug 2023 22:07:45 +0200
Subject: [PATCH 3/4] cap numpy to <1.24.0

OK so now numpy is the culprit (shipped unbound via ocrd) which had several deprecations expire with release of v1.24.0 that require changes to our codebase, e.g.
* The deprecation for the aliases np.object, np.bool, np.float, np.complex, np.str, and np.int is expired
* Ragged array creation will now always raise a ValueError unless dtype=object is passed.

See also here: https://numpy.org/devdocs/release/1.24.0-notes.html#expired-deprecations
---
 requirements.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/requirements.txt b/requirements.txt
index 0d7c5b2..a19a191 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,6 @@
 # ocrd includes opencv, numpy, shapely, click
 ocrd >= 2.23.3
+numpy <1.24.0
 scikit-learn >= 0.23.2
 tensorflow >= 2.4.0, <2.12.0
 imutils >= 0.5.3

From 3e6265757060a414370d21a5edceb3297a0f5d8b Mon Sep 17 00:00:00 2001
From: Clemens Neudecker <952378+cneud@users.noreply.github.com>
Date: Thu, 17 Aug 2023 23:02:10 +0200
Subject: [PATCH 4/4] added the TF upper bound in the README

---
 README.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index d74c4a9..f17d194 100644
--- a/README.md
+++ b/README.md
@@ -19,9 +19,9 @@
 * [OCR-D](https://github.com/qurator-spk/eynollah#use-as-ocr-d-processor) interface
 
 ## Installation
-Python versions `3.7-3.10` with Tensorflow `>=2.4` are currently supported.
+Python versions `3.7-3.10` with Tensorflow versions `2.4-2.11` are currently supported. 
 
-For (limited) GPU support the [matching](https://www.tensorflow.org/install/source#gpu) CUDA toolkit `>=10.1` needs to be installed.
+For (limited) GPU support the [matching](https://www.tensorflow.org/install/source#gpu) CUDA toolkit needs to be installed.
 
 You can either install via