Feature #1566 update Python version to 3.8.6

.github/workflows/documentation.yml

@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
         with:
-          python-version: '3.6'
+          python-version: '3.8'
       - name: Install dependencies
         run: |
           python -m pip install --upgrade sphinx sphinx-gallery sphinx_rtd_theme

.github/workflows/testing.yml

@@ -78,7 +78,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
         with:
-          python-version: '3.6'
+          python-version: '3.8'
       - name: Get METplus Image
         run: .github/jobs/docker_setup.sh
         env:

.readthedocs.yaml

@@ -12,7 +12,7 @@ formats: [pdf]
 # Optionally set the version of Python and requirements required to build your
 # docs
 python:
-   version: 3.7
+   version: 3.8
    install:
    - requirements: docs/requirements.txt
    - requirements: requirements.txt

environment.yml

@@ -1,7 +1,7 @@
 name: metplus_base
 channels:
-  - defaults
+  - conda-forge
 dependencies:
-  - python=3.6.3
+  - python=3.8.6
   - python-dateutil
 prefix: /home/met_test/.conda/envs/metplus_base

internal/tests/pytests/util/metplus_check/test_metplus_check.py

@@ -10,19 +10,19 @@
 #  a later version of python passes
 #  an earlier version of python fails
 @pytest.mark.parametrize(
-    'user, supported, torf', [
-        ('3.6.3', '3.6.3', True), # same
-        ('2.7',   '3.6.3', False), # earlier major
-        ('3.6.2', '3.6.3', False), # earlier bugfix
-        ('3.6.4', '3.6.3', True), # later bugfix
-        ('3.5.5', '3.6.3', False), # earlier minor, later bugfix
-        ('3.8.1', '3.6.3', True), # later minor, earlier bugfix
-        ('4.0.0', '3.6.3', True), # later major
+    'user, torf', [
+        ('3.6.3', True),  # same
+        ('2.7', False),  # earlier major
+        ('3.6.2', False),  # earlier bugfix
+        ('3.6.4', True),  # later bugfix
+        ('3.5.5', False),  # earlier minor, later bugfix
+        ('3.8.1', True),  # later minor, earlier bugfix
+        ('4.0.0', True),  # later major
     ]
 )
 @pytest.mark.util
-def test_metplus_check_python(user, supported, torf):
-    assert metplus_check.metplus_check_python_version(user, supported) == torf
+def test_metplus_check_python(user, torf):
+    assert metplus_check.metplus_check_python_version(user) == torf
 
 
 # checking METPLUS_DISABLE_PLOT_WRAPPERS and METPLUS_ENABLE_PLOT_WRAPPERS

metplus/PYTHON_VERSION

@@ -1 +1 @@
-3.6.3
+3.8.6

metplus/PYTHON_VERSION_MIN

@@ -0,0 +1 @@
+3.6.3

metplus/__init__.py

@@ -9,6 +9,9 @@ def get_metplus_release_date():
 def get_python_version():
     return get_metplus_info('PYTHON_VERSION')
 
+def get_python_version_min():
+    return get_metplus_info('PYTHON_VERSION_MIN')
+
 def get_metplus_info(info_rel_path):
     info_file = os.path.abspath(os.path.join(os.path.dirname(__file__),
                                              info_rel_path))

metplus/util/metplus_check.py

@@ -7,38 +7,59 @@
 import os
 import re
 
-from .. import get_python_version
+from .. import get_python_version, get_python_version_min
 
-SUPPORTED_PY_VERSION = get_python_version()
 
-def metplus_check_python_version(user_py, supported_py):
-    """!Test that the user's version of python is equal of higher than the
-        the supported version of python. Imported in each wrapper and run_metplus
-        to avoid confusing failures if the user's version is not current. Note:
-        SyntaxError from using f-strings (available in 3.6+) in earlier versions of
-        Python are output before the output from this function can be displayed.
-        Args:
-          @param user_py user's python version number, i.e. 3.8.1
-          @param supported_py currently supported python version number, i.e. 3.6.3
-          @returns True if version is at least supported, False if not
+def metplus_check_python_version(user):
+    """!Test that the user's version of python is equal or higher than the
+     the supported version of python. Also check against the recommended
+     version of Python. This is used in the run_metplus.py script
+     to avoid confusing failures if the user's version is not current. Note:
+     SyntaxError from using f-strings (available in 3.6+) in earlier versions
+     of Python are output before the output from this function can be
+     displayed.
+
+     @param user version of Python that the user is running
+     @returns True if version is at least supported, False if not
     """
-    supported_list = supported_py.split('.')
-    user_list = user_py.split('.')
+    supported = get_python_version_min()
+    recommended = get_python_version()
+
+    # check if user's Python version can run METplus wrappers
+    if not _python_version_is_sufficient(user, supported):
+        print("ERROR: Must be using Python {}".format(supported),
+              "or higher with the required packages installed."
+              " You are using {}.".format(user))
+        print("See the METplus documentation for more information.")
+        return False
+
+    # check if user's Python version is at least the recommended version
+    if not _python_version_is_sufficient(user, recommended):
+        print("WARNING: Python {}".format(recommended),
+              "or higher is recommended."
+              " You are using {}.".format(user))
+        print("See the METplus documentation for more information.")
+
+    return True
 
-    for user, supported in zip(user_list, supported_list):
+
+def _python_version_is_sufficient(user_version, test_version):
+    """! Check if user's version of Python is above or equal to another.
+
+    @param user_version Python version of user, e.g. 3.7.3
+    @param test_version Python version to compare, e.g. 3.8.6
+    @returns True if user's version is sufficient, False otherwise
+    """
+    for user, test in zip(user_version.split('.'), test_version.split('.')):
         # if the same version is used, continue
-        if int(user) == int(supported):
+        if int(user) == int(test):
             continue
 
         # if a higher version is used, break out of the loop
-        if int(user) > int(supported):
+        if int(user) > int(test):
             break
 
-        # a lower version is used - report and exit
-        print("ERROR: Must be using Python {} or higher ".format(supported_py)+
-              "with the required packages installed.")
-        print("You are using {}.".format(user_py))
-        print("See the METplus documentation for more information.")
+        # a lower version is used, return False
         return False
 
     return True
@@ -54,6 +75,7 @@ def metplus_check_environment_variables(environ):
 
     return True
 
+
 def evaluates_to_true(value):
     """!Check if the value matches an expression that should be interpretted as False
         Without this, environment variables that are set are interpretted as True no
@@ -70,6 +92,7 @@ def evaluates_to_true(value):
 
     return True
 
+
 def plot_wrappers_are_enabled(environ):
     """! Check METPLUS_[DISABLE/ENABLE]_PLOT_WRAPPERS. If both are set it should error
          and exit. Otherwise it should warn if DISABLE if used beacuse ENABLE should be
@@ -97,13 +120,12 @@ def plot_wrappers_are_enabled(environ):
     # default behavior is to enable plot wrappers
     return True
 
+
 # get user's python version and check that it is equal or
 # higher than the supported version
-USER_PY_VERSION = sys.version.split(' ')[0]
-compatible_python_version = metplus_check_python_version(USER_PY_VERSION,
-                                                         SUPPORTED_PY_VERSION)
+user_python_version = sys.version.split(' ')[0]
+compatible_python_version = metplus_check_python_version(user_python_version)
 
 compatible_environment = metplus_check_environment_variables(os.environ)
-
 if not compatible_python_version or not compatible_environment:
     sys.exit(1)

requirements.txt

@@ -1,3 +1,3 @@
-certifi==2020.6.20
-python-dateutil==2.8.1
-six==1.15.0
+certifi==2022.6.15
+python-dateutil==2.8.2
+six==1.16.0

setup.py

@@ -8,8 +8,8 @@
 with open("metplus/VERSION", "r") as fh:
     version = fh.read().strip()
 
-with open("metplus/PYTHON_VERSION", "r") as fh:
-    python_version = fh.read().strip()
+with open("metplus/PYTHON_VERSION_MIN", "r") as fh:
+    python_version_req = fh.read().strip()
 
 # get list of additional files needed to add to package
 data_files = []
@@ -18,6 +18,7 @@
                   ['metplus/VERSION',
                    'metplus/RELEASE_DATE',
                    'metplus/PYTHON_VERSION',
+                   'metplus/PYTHON_VERSION_MIN',
                   ]))
 
 for root, _, files in os.walk('parm'):
@@ -47,7 +48,7 @@
          "License :: OSI Approved :: MIT License", 
          "Operating System :: OS Independent",
     ],
-    python_requires=f'>={python_version}',
+    python_requires=f'>={python_version_req}',
     data_files=data_files,
     zip_safe=False,
 )