Add more python variable tests

unittest/python/func.py

@@ -4,6 +4,11 @@ from __future__ import print_function
 def square(val):
     return val*val
 
+def bool_to_val(txt):
+    if txt.upper() in ["TRUE", "YES"]:
+        return 1.0
+    return 0.0
+
 def printnum():
     print("2.25")
 
@@ -11,8 +16,7 @@ def printtxt():
     print("sometext")
 
 def getidxvar(lmpptr):
-    from lammps import lammps, LMP_VAR_EQUAL
+    from lammps import lammps
     lmp = lammps(ptr=lmpptr)
-
-    val = lmp.extract_variable("idx",None,LMP_VAR_EQUAL)
+    val = lmp.extract_variable("idx")
     print(val)