Drop support for Python 3.6 (#299)

Update the `python_requires` field and metadata in `setup.cfg`. Bump the
minimum version tested on CI to 3.7 and the Python requirement in 
doc/install.rst. From pyupgrade, removed an unnecessary list creation
in make_registry.

Co-authored-by: Hugo van Kemenade <[email protected]>

Author: leouieda

.github/workflows/docs.yml

@@ -30,7 +30,6 @@ jobs:
     runs-on: ubuntu-latest
     env:
       REQUIREMENTS: env/requirements-build.txt env/requirements-docs.txt
-      PYTHON: 3.9
 
     steps:
       # Cancel any previous run of the test job
@@ -61,7 +60,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v2
         with:
-          python-version: ${{ env.PYTHON }}
+          python-version: "3.10"
 
       - name: Collect requirements
         run: |

.github/workflows/pypi.yml

@@ -47,7 +47,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v2
         with:
-          python-version: "3.9"
+          python-version: "3.10"
 
       - name: Install requirements
         run: |

.github/workflows/test.yml

@@ -44,7 +44,7 @@ jobs:
           - macos
           - windows
         python:
-          - "3.6"
+          - "3.7"
           - "3.10"
         dependencies:
           - latest

doc/install.rst

@@ -39,7 +39,7 @@ There are different ways to install Pooch:
 Which Python?
 -------------
 
-You'll need **Python >= 3.6**. See :ref:`python-versions` if you
+You'll need **Python >= 3.7**. See :ref:`python-versions` if you
 require support for older versions.
 
 .. _dependencies:

environment.yml

@@ -3,7 +3,7 @@ channels:
     - conda-forge
     - defaults
 dependencies:
-    - python==3.9
+    - python==3.10
     - pip
     # Run
     - requests

pooch/hashes.py

@@ -208,11 +208,9 @@ def make_registry(directory, output, recursive=True):
         pattern = "*"
 
     files = sorted(
-        [
-            str(path.relative_to(directory))
-            for path in directory.glob(pattern)
-            if path.is_file()
-        ]
+        str(path.relative_to(directory))
+        for path in directory.glob(pattern)
+        if path.is_file()
     )
 
     hashes = [file_hash(str(directory / fname)) for fname in files]

setup.cfg

@@ -23,7 +23,6 @@ classifiers =
     Topic :: Scientific/Engineering
     Topic :: Software Development :: Libraries
     Programming Language :: Python :: 3 :: Only
-    Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
@@ -39,7 +38,7 @@ project_urls =
 zip_safe = True
 include_package_data = True
 packages = find:
-python_requires = >=3.6
+python_requires = >=3.7
 setup_requires =
 install_requires =
     appdirs>=1.3.0