Do not include Constants in automatically determined FunctionGraph inputs

aesara/graph/fg.py

@@ -114,7 +114,7 @@ class FunctionGraph(MetaObject):
             raise ValueError("No outputs specified")
 
         if inputs is None:
-            inputs = [i for i in graph_inputs(outputs)]
+            inputs = [i for i in graph_inputs(outputs) if not isinstance(i, Constant)]
 
         if clone:
             memo = clone_get_equiv(

tests/graph/test_fg.py

@@ -5,7 +5,7 @@ import pytest
 
 from aesara.configdefaults import config
 from aesara.graph.fg import FunctionGraph, MissingInputError
-from tests.graph.utils import MyVariable, MyVariable2, op1, op2, op3
+from tests.graph.utils import MyConstant, MyVariable, MyVariable2, op1, op2, op3
 
 
 class TestFunctionGraph:
@@ -62,7 +62,9 @@ class TestFunctionGraph:
         assert fg.get_clients(var3) == [(var4.owner, 0), ("output", 0)]
         assert fg.get_clients(var4) == [("output", 1)]
 
-        fg = FunctionGraph(outputs=[var3, var4], clone=False)
+        varC = MyConstant("varC")
+        var5 = op1(var1, varC)
+        fg = FunctionGraph(outputs=[var3, var4, var5], clone=False)
         assert fg.inputs == [var1, var2]
 
         memo = {}

tests/graph/utils.py

 import numpy as np
 
-from aesara.graph.basic import Apply, Variable
+from aesara.graph.basic import Apply, Constant, Variable
 from aesara.graph.op import Op
 from aesara.graph.type import Type
 
@@ -37,6 +37,10 @@ def MyVariable(name):
     return Variable(MyType(), None, None, name=name)
 
 
+def MyConstant(name, data=None):
+    return Constant(MyType(), data, name=name)
+
+
 def MyVariable2(name):
     return Variable(MyType2(), None, None, name=name)