From 710a6870627fdfcb76dff1c6cf97acbd73cf09f0 Mon Sep 17 00:00:00 2001
From: Daniel Scheffler <danschef@gfz-potsdam.de>
Date: Thu, 11 Mar 2021 22:13:52 +0100
Subject: [PATCH] Dropped support for Python versions below 3.6.

Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>
---
 CONTRIBUTING.rst                                |  2 +-
 arosics/CoReg_local.py                          |  4 ----
 docs/installation.rst                           |  4 ++--
 requirements.txt                                |  1 -
 requirements_pip.txt                            |  1 -
 setup.py                                        |  3 ---
 tests/CI_docker/context/environment_arosics.yml |  1 -
 tox.ini                                         | 11 +++++------
 8 files changed, 8 insertions(+), 19 deletions(-)

diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index 3008efc..37b570a 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -120,7 +120,7 @@ Before you submit a pull request, check that it meets these guidelines:
 2. If the pull request adds functionality, the docs should be updated. Put
    your new functionality into a function with a docstring, and add the
    feature to the list in README.rst.
-3. The pull request should work for Python 2.6, 2.7, 3.3, 3.4 and 3.5, and for PyPy. Check
+3. The pull request should work for Python 3.6+, and for PyPy. Check
    https://travis-ci.org/danschef/arosics/pull_requests
    and make sure that the tests pass for all supported Python versions.
 
diff --git a/arosics/CoReg_local.py b/arosics/CoReg_local.py
index 82924ca..39015eb 100644
--- a/arosics/CoReg_local.py
+++ b/arosics/CoReg_local.py
@@ -24,7 +24,6 @@
 import warnings
 import os
 from copy import copy
-from six import PY2
 from typing import TYPE_CHECKING
 
 # custom
@@ -176,9 +175,6 @@ def __init__(self, im_ref, im_tgt, grid_res, max_points=None, window_size=(256,
             warnings.warn("'-out_gsd' is ignored because '-match_gsd' is set.\n")
         if out_gsd:
             assert isinstance(out_gsd, list) and len(out_gsd) == 2, 'out_gsd must be a list with two values.'
-        if PY2 and (CPUs is None or (isinstance(CPUs, int) and CPUs > 1)):
-            CPUs = 1
-            warnings.warn('Multiprocessing is currently not supported for Python 2. Using singleprocessing.')
 
         self.params = dict([x for x in locals().items() if x[0] != "self" and not x[0].startswith('__')])
 
diff --git a/docs/installation.rst b/docs/installation.rst
index b71b689..4a5afa9 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -59,8 +59,8 @@ you through the process.
 
 .. note::
 
-    AROSICS has been tested with Python 3.4+ and Python 2.7. It should be fully compatible to all Python versions
-    from 2.7 onwards. However, we will continously drop the support for Python 2.7 in future.
+    AROSICS has been tested with Python 3.6+. It should be fully compatible to all Python versions
+    from 3.6 onwards. Python 2.7 support was dropped in AROSICS 1.3 due to its end of life status.
 
 
 .. _pip: https://pip.pypa.io
diff --git a/requirements.txt b/requirements.txt
index c0d0f18..107b8a3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,4 +15,3 @@ pyproj>2.2.0
 py_tools_ds>=0.15.10
 scikit-image>=0.16.0
 shapely
-six
diff --git a/requirements_pip.txt b/requirements_pip.txt
index d73b67f..2cc52f9 100644
--- a/requirements_pip.txt
+++ b/requirements_pip.txt
@@ -1,4 +1,3 @@
 folium>=0.6.0,!=0.12.0
 geojson
 plotly
-six
diff --git a/setup.py b/setup.py
index 3490b66..550269c 100644
--- a/setup.py
+++ b/setup.py
@@ -55,7 +55,6 @@
     'py_tools_ds>=0.15.10',
     'scikit-image>=0.16.0',
     'shapely',
-    'six',
 ]
 
 req_setup = [
@@ -83,8 +82,6 @@
         'License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)',
         'Natural Language :: English',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.4',
-        'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
diff --git a/tests/CI_docker/context/environment_arosics.yml b/tests/CI_docker/context/environment_arosics.yml
index e603f77..2f1da8f 100644
--- a/tests/CI_docker/context/environment_arosics.yml
+++ b/tests/CI_docker/context/environment_arosics.yml
@@ -27,7 +27,6 @@ dependencies:
     - folium>=0.6.0,!=0.12.0
     - geojson
     - plotly
-    - six
 
     # doc requirements
     - coverage
diff --git a/tox.ini b/tox.ini
index 8131634..084cd99 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,13 +1,12 @@
 [tox]
-envlist = py26, py27, py33, py34, py35, flake8
+envlist = py36, py37, py38, py39, flake8
 
 [travis]
 python =
-    3.5: py35
-    3.4: py34
-    3.3: py33
-    2.7: py27
-    2.6: py26
+    3.9: py39
+    3.8: py38
+    3.7: py37
+    3.6: py36
 
 [testenv:flake8]
 basepython=python