Drop support for Python 3.7 (#403)

* Remove python 3.7 support

* Update docs

CHANGES.rst

@@ -18,6 +18,7 @@ Version 0.0.4   (unreleased)
   for `flax`.
 • New methods and a function for computing Jacobian-vector products for
   `Operator` objects.
+• Drop support for Python 3.7.
 
 
 

README.rst

@@ -1,6 +1,6 @@
-.. image:: https://img.shields.io/badge/python-3.7+-green.svg
+.. image:: https://img.shields.io/badge/python-3.8+-green.svg
     :target: https://www.python.org/
-    :alt: Python >= 3.7
+    :alt: Python >= 3.8
 
 .. image:: https://img.shields.io/github/license/lanl/scico.svg
     :target: https://github.com/lanl/scico/blob/main/LICENSE

docs/source/contributing.rst

@@ -45,7 +45,7 @@ Installing a Development Version
 1. Fork both the ``scico`` and ``scico-data`` repositories, creating
    copies of these repositories in your own git account.
 
-2. Make sure that you have Python 3.7 or later installed in order to
+2. Make sure that you have Python 3.8 or later installed in order to
    create a conda virtual environment.
 
 3. Clone your fork from the source repo.
@@ -54,7 +54,7 @@ Installing a Development Version
 
       git clone --recurse-submodules [email protected]:<username>/scico.git
 
-4. Create a conda environment using Python 3.7 or later, e.g.:
+4. Create a conda environment using Python 3.8 or later, e.g.:
 
    ::
 

docs/source/install.rst

@@ -3,7 +3,7 @@
 Installing SCICO
 ================
 
-SCICO requires Python version 3.7 or later. (Version 3.9 is
+SCICO requires Python version 3.8 or later. (Version 3.9 is
 recommended as it is the version under which SCICO has been most
 thoroughly tested.) It is supported on both Linux and macOS, but is
 not currently supported on Windows due to the limited support for

scico/__init__.py

@@ -13,8 +13,6 @@
 import logging
 import sys
 
-from . import _python37  # python 3.7 compatibility
-
 # isort: off
 from ._autograd import grad, jacrev, linear_adjoint, value_and_grad, cvjp
 

setup.py

@@ -31,7 +31,7 @@
     lines = f.readlines()
 install_requires = [line.strip() for line in lines]
 
-python_requires = ">=3.7"
+python_requires = ">=3.8"
 tests_require = ["pytest", "pytest-runner"]
 
 extra_require_files = [