Merge pull request #351 from dstansby/dstansby-patch-1

Make sympy optional dep

Author: dstansby

doc/source/changes.rst

@@ -3,6 +3,11 @@
 Changelog
 =========
 
+1.1.1
+-----
+Fixed imports so pfsspy does not depend on ``sympy`` as a runtime dependency.
+(``sympy`` is still needed for the ``analytic`` module however).
+
 1.1.0
 -----
 New requirements

pfsspy/__init__.py

@@ -1,5 +1,9 @@
 # Import pfsspy sub-modules to have them available through pfsspy.{name}
-import pfsspy.analytic
+try:
+    import pfsspy.analytic
+except ModuleNotFoundError:
+    # If sympy isn't installed
+    pass
 import pfsspy.coords
 import pfsspy.fieldline
 # Import this to register map sources