Merge pull request #283 from isuruf/pi

Make constants return true for is_number

Author: isuruf

symengine/lib/symengine_wrapper.pyx

@@ -1230,6 +1230,10 @@ cdef class Constant(Expr):
             return
         self.thisptr = symengine.make_rcp_Constant(name.encode("utf-8"))
 
+    @property
+    def is_number(self):
+        return True
+
     def _sympy_(self):
         raise Exception("Unknown Constant")
 

symengine/tests/test_number.py

@@ -1,6 +1,6 @@
 from symengine.utilities import raises
 
-from symengine import Integer, I, S
+from symengine import Integer, I, S, pi
 from symengine.lib.symengine_wrapper import (perfect_power, is_square, integer_nthroot)
 
 
@@ -94,6 +94,8 @@ def test_is_conditions():
     assert not i.is_nonnegative
     assert i.is_complex
 
+    assert pi.is_number
+
 
 def test_perfect_power():
     assert perfect_power(1) == True