[pre-commit.ci] auto fixes from pre-commit hooks

Author: pre-commit-ci[bot]

src/diffpy/structure/structure.py

@@ -15,9 +15,9 @@
 """This module defines class `Structure`."""
 
 import copy as copymod
+import warnings
 
 import numpy
-import warnings
 
 from diffpy.structure.atom import Atom
 from diffpy.structure.lattice import Lattice

tests/test_structure.py

@@ -120,8 +120,6 @@ def test___copy__(self):
     #     """check Structure.getLastAtom()"""
     #     return
 
-
-
     def test_addNewAtom(self):
         """Duplicate test for the deprecated addNewAtom method.
 
@@ -620,6 +618,7 @@ def test_pickling(self):
 
 # End of class TestStructure
 
+
 # ----------------------------------------------------------------------------
 @pytest.mark.parametrize(
     "existing, atype, xyz, expected_len, expected_element, expected_xyz",
@@ -672,5 +671,6 @@ def test_add_new_atom_duplicate():
     assert structure[-1].element == "C"
     assert numpy.allclose(structure[-1].xyz, [0.1, 0.2, 0.3])
 
+
 if __name__ == "__main__":
     unittest.main()