fix : Tolerane import in rod + black fixes
#!/usr/bin/env python3
import numpy as np
+from .utils import Tolerance
__author__ = "Fan Kiat Chan"
__copyright__ = "Copyright 2019, Elastica Python"
@@ -12,8 +13,6 @@ __email__ = "fchan5@illinois.edu"
__status__ = "Production"
-
-
class rod(object):
###########################
# n elements, n+1 nodes
