Add is_namedtuple().

2 files changed, 14 insertions, 1 deletions

diff --git a/raven/utils/__init__.py b/raven/utils/__init__.py
index b4b22b8..a0de8cb 100644
--- a/raven/utils/__init__.py
+++ b/raven/utils/__init__.py
@@ -15,7 +15,9 @@ except ImportError:
 import sys
 
 from raven.utils.compat import iteritems, string_types
-from raven.utils.basic import merge_dicts, varmap, memoize, once
+from raven.utils.basic import (
+    merge_dicts, varmap, memoize, once, is_namedtuple
+)
 
 
 logger = logging.getLogger('raven.errors')
diff --git a/raven/utils/basic.py b/raven/utils/basic.py
index 4a40e8e..d995423 100644
--- a/raven/utils/basic.py
+++ b/raven/utils/basic.py
@@ -83,3 +83,14 @@ def once(func):
     new_func = update_wrapper(new_func, func)
     new_func.called = False
     return new_func
+
+
+def is_namedtuple(value):
+    # https://stackoverflow.com/a/2166841/1843746
+    # But modified to handle subclasses of namedtuples.
+    if not isinstance(value, tuple):
+        return False
+    f = getattr(type(value), '_fields', None)
+    if not isinstance(f, tuple):
+        return False
+    return all(type(n) == str for n in f)