diff --git a/ppmpy/__init__.py b/ppmpy/__init__.py
index 1ac8cb3..49d6637 100644
--- a/ppmpy/__init__.py
+++ b/ppmpy/__init__.py
@@ -10,8 +10,7 @@
 
 
 from .eigen import eigen
+from .euler import Euler
 from .grid import FVGrid
 from .reconstruction import PPMInterpolant, flattening_coefficient
 from .riemann_exact import RiemannProblem, State
-
-from .euler import Euler
diff --git a/ppmpy/euler.py b/ppmpy/euler.py
index 100779c..0fb70f6 100644
--- a/ppmpy/euler.py
+++ b/ppmpy/euler.py
@@ -8,7 +8,8 @@
 
 from ppmpy.eigen import eigen
 from ppmpy.grid import FVGrid
-from ppmpy.reconstruction import PPMInterpolant, HSEPPMInterpolant, flattening_coefficient
+from ppmpy.reconstruction import (HSEPPMInterpolant, PPMInterpolant,
+                                  flattening_coefficient)
 from ppmpy.riemann_exact import RiemannProblem, State
 
 
diff --git a/ppmpy/grid.py b/ppmpy/grid.py
index 26d6303..77c4c8d 100644
--- a/ppmpy/grid.py
+++ b/ppmpy/grid.py
@@ -3,8 +3,8 @@
 """
 
 
-import numpy as np
 import matplotlib.pyplot as plt
+import numpy as np
 
 
 class GridPlot:
diff --git a/ppmpy/riemann_exact.py b/ppmpy/riemann_exact.py
index 3d19093..c44496f 100644
--- a/ppmpy/riemann_exact.py
+++ b/ppmpy/riemann_exact.py
@@ -14,8 +14,8 @@
 `q_int = rp.sample_solution()`
 """
 
-import numpy as np
 import matplotlib.pyplot as plt
+import numpy as np
 from scipy import optimize
 
 
diff --git a/ppmpy/tests/test_euler.py b/ppmpy/tests/test_euler.py
index 36bcc33..929ae98 100644
--- a/ppmpy/tests/test_euler.py
+++ b/ppmpy/tests/test_euler.py
@@ -2,7 +2,7 @@
 from numpy.testing import assert_array_almost_equal_nulp
 
 from ppmpy.euler import Euler, FluidVars
-from ppmpy.initial_conditions import sod, acoustic_pulse
+from ppmpy.initial_conditions import acoustic_pulse, sod
 
 
 class TestFluidVars:
diff --git a/ppmpy/tests/test_gravity.py b/ppmpy/tests/test_gravity.py
index b5330ea..36acab7 100644
--- a/ppmpy/tests/test_gravity.py
+++ b/ppmpy/tests/test_gravity.py
@@ -1,7 +1,7 @@
 import numpy as np
 
-from ppmpy.grid import FVGrid
 from ppmpy.gravity import constant_gravity
+from ppmpy.grid import FVGrid
 
 
 class TestGravity:
diff --git a/ppmpy/tests/test_grid.py b/ppmpy/tests/test_grid.py
index 04b65e1..7271c43 100644
--- a/ppmpy/tests/test_grid.py
+++ b/ppmpy/tests/test_grid.py
@@ -1,5 +1,5 @@
 import numpy as np
-from numpy.testing import assert_array_equal, assert_array_almost_equal_nulp
+from numpy.testing import assert_array_almost_equal_nulp, assert_array_equal
 from pytest import approx
 
 from ppmpy.grid import FVGrid
diff --git a/ppmpy/tests/test_ppm_reconstruction.py b/ppmpy/tests/test_ppm_reconstruction.py
index f2ce2f7..876bb88 100644
--- a/ppmpy/tests/test_ppm_reconstruction.py
+++ b/ppmpy/tests/test_ppm_reconstruction.py
@@ -1,5 +1,5 @@
 import numpy as np
-from numpy.testing import assert_array_equal, assert_array_almost_equal_nulp
+from numpy.testing import assert_array_almost_equal_nulp, assert_array_equal
 
 from ppmpy.grid import FVGrid
 from ppmpy.reconstruction import PPMInterpolant
diff --git a/ppmpy/tests/test_riemann.py b/ppmpy/tests/test_riemann.py
index 4669074..0bdffcd 100644
--- a/ppmpy/tests/test_riemann.py
+++ b/ppmpy/tests/test_riemann.py
@@ -1,6 +1,6 @@
 from pytest import approx
 
-from ppmpy import State, RiemannProblem
+from ppmpy import RiemannProblem, State
 
 
 class TestGrid:
diff --git a/pyproject.toml b/pyproject.toml
index 00addde..7972d87 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ dependencies = [
 
 [project.urls]
 Homepage = "https://github.com/python-hydro/ppmpy"
-
+Documentation = "https://python-hydro.github.io/ppmpy"
 
 # packaging