pre-commit: Python imports (#2686)

* pre-commit: Python imports

Add two new Python rules to:
- remove unused imports
- sort imports according to PEP8

* pre-commit: Python imports

Add two new Python rules to:
- remove unused imports
- sort imports according to PEP8

`.editorconfig`: isort options

https://github.com/PyCQA/isort/wiki/isort-Settings

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

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* move import os (mpl)

* move import yt (mpl)

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

for more information, see https://pre-commit.ci

* Cleanup around matplotlib.use

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

for more information, see https://pre-commit.ci

* Cleaning: double np and lib

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

1 files changed, 8 insertions, 4 deletions

diff --git a/Examples/Tests/PEC/analysis_pec.py b/Examples/Tests/PEC/analysis_pec.py
index 32bb10ddf..0414420ef 100755
--- a/Examples/Tests/PEC/analysis_pec.py
+++ b/Examples/Tests/PEC/analysis_pec.py
@@ -5,22 +5,26 @@
 # This file is part of WarpX.
 #
 # License: BSD-3-Clause-LBNL
-
-
+#
 # This is a script that analyses the simulation results from
 # the script `inputs_field_PEC_3d`. This simulates a sinusoindal wave.
 # The electric field (Ey) is a standing wave due to the PEC boundary condition,
 # and as a result, the minimum and maximum value after reflection would be two times the value at initialization due to constructive interference.
 # Additionally, the value of Ey at the boundary must be equal to zero.
-import sys
+import os
 import re
+import sys
+
 import matplotlib
+
 matplotlib.use('Agg')
 import matplotlib.pyplot as plt
 import yt
+
 yt.funcs.mylog.setLevel(50)
+
 import numpy as np
-import os
+
 sys.path.insert(1, '../../../../warpx/Regression/Checksum/')
 import checksumAPI