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-rw-r--r--klippy/extras/delta_calibrate.py6
1 files changed, 5 insertions, 1 deletions
diff --git a/klippy/extras/delta_calibrate.py b/klippy/extras/delta_calibrate.py
index 342aa110..1a6ad8c8 100644
--- a/klippy/extras/delta_calibrate.py
+++ b/klippy/extras/delta_calibrate.py
@@ -3,8 +3,12 @@
# Copyright (C) 2017-2019 Kevin O'Connor <kevin@koconnor.net>
#
# This file may be distributed under the terms of the GNU GPLv3 license.
-import math, logging, collections
+import collections
+import logging
+import math
+
import mathutil
+
from . import probe
# A "stable position" is a 3-tuple containing the number of steps