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-rw-r--r--Python/pywarpx/callbacks.py6
1 files changed, 4 insertions, 2 deletions
diff --git a/Python/pywarpx/callbacks.py b/Python/pywarpx/callbacks.py
index 49d0c3db2..35cc51894 100644
--- a/Python/pywarpx/callbacks.py
+++ b/Python/pywarpx/callbacks.py
@@ -53,15 +53,17 @@ installafterstep(myplots)
"""
from __future__ import generators
-import types
import copy
-import time
import ctypes
import sys
+import time
+import types
+
import numpy
from ._libwarpx import libwarpx
+
class CallbackFunctions(object):
"""
Class to handle call back function lists.