add name property to FunctionSymbol

Author: isuruf

symengine/lib/symengine_wrapper.in.pyx

@@ -2841,6 +2841,10 @@ class FunctionSymbol(Function):
         name = deref(X).get_name().decode("utf-8")
         return str(name)
 
+    @property
+    def name(Basic self):
+        return self.get_name()
+
     def _sympy_(self):
         import sympy
         name = self.get_name()

symengine/tests/test_functions.py

@@ -105,12 +105,15 @@ def test_derivative():
 
 def test_function():
     x = Symbol("x")
-    assert Function("f")(x) == function_symbol("f", x)
+    fx = Function("f")(x)
+    assert fx == function_symbol("f", x)
 
     raises(TypeError, lambda: Function("f", "x"))
     raises(TypeError, lambda: Function("f", x))
     raises(TypeError, lambda: Function())
 
+    assert fx.name == "f"
+
 
 def test_abs():
     x = Symbol("x")