Merge pull request #491 from RemDelaporteMathurin/RemDelaporteMathuri…

…n-patch-1

added __version__ attribute

FESTIM/__init__.py

@@ -1,3 +1,18 @@
+try:
+    # Python 3.8+
+    from importlib import metadata
+except ImportError:
+    try:
+        import importlib_metadata as metadata
+    except ImportError:
+        __version__ = "unknown"
+
+try:
+    __version__ = metadata.version("FESTIM")
+except Exception:
+    __version__ = "unknown"
+
+
 import sympy as sp
 
 x, y, z, t = sp.symbols("x[0] x[1] x[2] t")