1 files changed, 24 insertions, 3 deletions
diff --git a/gallery_dl/util.py b/gallery_dl/util.py
index e76ddf3..5744ef3 100644
--- a/gallery_dl/util.py
+++ b/gallery_dl/util.py
@@ -540,10 +540,14 @@ class CustomNone():
     def __bool__():
         return False
 
+    def __eq__(self, other):
+        return self is other
+
+    def __ne__(self, other):
+        return self is not other
+
     __lt__ = true
     __le__ = true
-    __eq__ = false
-    __ne__ = true
     __gt__ = false
     __ge__ = false
 
@@ -616,11 +620,28 @@ else:
     Popen = subprocess.Popen
 
 
-def compile_expression(expr, name="<expr>", globals=None):
+def compile_expression_raw(expr, name="<expr>", globals=None):
     code_object = compile(expr, name, "eval")
     return functools.partial(eval, code_object, globals or GLOBALS)
 
 
+def compile_expression_tryexcept(expr, name="<expr>", globals=None):
+    code_object = compile(expr, name, "eval")
+
+    def _eval(locals=None, globals=(globals or GLOBALS), co=code_object):
+        try:
+            return eval(co, globals, locals)
+        except exception.GalleryDLException:
+            raise
+        except Exception:
+            return False
+
+    return _eval
+
+
+compile_expression = compile_expression_tryexcept
+
+
 def import_file(path):
     """Import a Python module from a filesystem path"""
     path, name = os.path.split(path)