Check and fix all constants and units compare to MetPy results

tests/metpy_simpletest.py

@@ -0,0 +1,14 @@
+# SPDX-FileCopyrightText: 2017 Scott Shawcroft, written for Adafruit Industries
+# SPDX-FileCopyrightText: Copyright (c) 2021 Arofarn
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
+"""Same as umetpy_simpletest but for original MetPy module, to compare and validate results"""
+
+import metpy.constants as mpconsts
+
+# pylint: disable=eval-used
+print("List of all constants:\n")
+for cst in dir(mpconsts):
+    if cst[0] != "_" and cst not in ["exporter", "units"]:
+        print("{:30s} = {:.12f}".format(cst, eval("{}.{}".format("mpconsts", cst))))