update collection package

emborg/collection.py

@@ -27,12 +27,10 @@
 __version__ = "0.5.0"
 __released__ = "2021-01-27"
 
-class NothingGiven:
-    def __bool__(self):
-        return False
 
 
 # Utilities {{{1
+# split_lines() {{{2
 def split_lines(text, comment=None, strip=False, cull=False, sep=None):
     """Split lines
 
@@ -59,6 +57,13 @@ def split_lines(text, comment=None, strip=False, cull=False, sep=None):
     return lines
 
 
+# Null {{{2
+# class that is used as a default in functions to signal nothing was given
+class Null:
+    def __bool__(self):
+        return False
+
+
 # Collection {{{1
 class Collection(object):
     fmt = '{v}'     # default value format
@@ -115,11 +120,11 @@ def items(self):
         except AttributeError:
             return list(enumerate(self.collection))
 
-    def get(self, key, default=NothingGiven):
+    def get(self, key, default=Null):
         try:
             return self.collection[key]
         except (KeyError, IndexError):
-            if default == NothingGiven:
+            if default == Null:
                 raise
             return default