diff --git a/src/mceditlib/revisionhistory.py b/src/mceditlib/revisionhistory.py
index da2860a..3c1666b 100644
--- a/src/mceditlib/revisionhistory.py
+++ b/src/mceditlib/revisionhistory.py
@@ -10,6 +10,7 @@ import shutil
 
 from mceditlib.anvil.worldfolder import AnvilWorldFolder
 from mceditlib.exceptions import ChunkNotPresent
+from mceditlib.util.progress import rescaleProgress, enumProgress
 
 log = logging.getLogger(__name__)
 #
@@ -360,46 +361,11 @@ class RevisionHistory(object):
             currentNode.invalid = True
             shutil.rmtree(currentNode.worldFolder.filename, ignore_errors=True)
 
+
 def copyToFolder(destFolder, sourceNode, presaveNode=None):
     for status in copyToFolderIter(destFolder, sourceNode, presaveNode):
         pass
 
-def rescaleProgress(iterable, start, end):
-    """
-    Given an iterable that yields (current, maximum, status) tuples, rescales current and maximum
-    to fit within the range [start, end]. `current` is assumed to start at zero.
-
-    :param iterable:
-    :param start:
-    :param end:
-    :return:
-    """
-    d = end - start
-
-    for current, maximum, status in iterable:
-        yield start + current * d / maximum, end, status
-
-
-def enumProgress(collection, start, end=None):
-    """
-    Iterate through a collection, yielding (progress, value) tuples. `progress` is the value
-    between `start` and `end` proportional to the progress through the collection.
-
-    :param collection:
-    :param progress:
-    :return:
-    """
-    if end is None:
-        end = start
-        start = 0
-
-    if len(collection) == 0:
-        return
-
-    progFraction = (end - start) / len(collection)
-    for i, value in enumerate(collection):
-        yield start + i * progFraction, value
-
 
 def copyToFolderIter(destFolder, sourceNode, presaveNode=None):
     # Progress counts:
diff --git a/src/mceditlib/util/progress.py b/src/mceditlib/util/progress.py
new file mode 100644
index 0000000..23cb0b6
--- /dev/null
+++ b/src/mceditlib/util/progress.py
@@ -0,0 +1,44 @@
+"""
+    progress
+"""
+from __future__ import absolute_import, division, print_function, unicode_literals
+import logging
+
+log = logging.getLogger(__name__)
+
+
+def rescaleProgress(iterable, start, end):
+    """
+    Given an iterable that yields (current, maximum, status) tuples, rescales current and maximum
+    to fit within the range [start, end]. `current` is assumed to start at zero.
+
+    :param iterable:
+    :param start:
+    :param end:
+    :return:
+    """
+    d = end - start
+
+    for current, maximum, status in iterable:
+        yield start + current * d / maximum, end, status
+
+
+def enumProgress(collection, start, end=None):
+    """
+    Iterate through a collection, yielding (progress, value) tuples. `progress` is the value
+    between `start` and `end` proportional to the progress through the collection.
+
+    :param collection:
+    :param progress:
+    :return:
+    """
+    if end is None:
+        end = start
+        start = 0
+
+    if len(collection) == 0:
+        return
+
+    progFraction = (end - start) / len(collection)
+    for i, value in enumerate(collection):
+        yield start + i * progFraction, value
\ No newline at end of file