Black lint, fix typos and run isort

Author: weiji14

pygmt/exceptions.py

@@ -45,6 +45,7 @@ class GMTVersionError(GMTError):
     Raised when an incompatible version of GMT is being used.
     """
 
+
 class GMTImageComparisonFailure(AssertionError):
     """
     Raised when a comparison between two images fails.

pygmt/helpers/testing.py

@@ -1,8 +1,10 @@
 import os
 import sys
 from pathlib import Path
+
 from matplotlib.testing.compare import compare_images
-from ..exceptions import GMTImageComparisonFailure
+
+from ..exceptions import GMTImageComparisonFailure, GMTInvalidInput
 
 
 def check_figures_equal(fig_ref, fig_test, fig_prefix=None, tol=0.0):
@@ -11,13 +13,13 @@ def check_figures_equal(fig_ref, fig_test, fig_prefix=None, tol=0.0):
     if not fig_prefix:
         try:
             fig_prefix = sys._getframe(1).f_code.co_name
-        except VauleError:
+        except ValueError:
             raise GMTInvalidInput("fig_prefix is required.")
 
     os.makedirs(result_dir, exist_ok=True)
 
-    ref_image_path = os.path.join(result_dir, fig_prefix + '-expected.png')
-    test_image_path = os.path.join(result_dir, fig_prefix + '.png')
+    ref_image_path = os.path.join(result_dir, fig_prefix + "-expected.png")
+    test_image_path = os.path.join(result_dir, fig_prefix + ".png")
 
     fig_ref.savefig(ref_image_path)
     fig_test.savefig(test_image_path)
@@ -31,5 +33,5 @@ def check_figures_equal(fig_ref, fig_test, fig_prefix=None, tol=0.0):
         for key in ["actual", "expected"]:
             err[key] = os.path.relpath(err[key])
         raise GMTImageComparisonFailure(
-            'images not close (RMS %(rms).3f):\n\t%(actual)s\n\t%(expected)s '
-             % err)
+            "images not close (RMS %(rms).3f):\n\t%(actual)s\n\t%(expected)s " % err
+        )

pygmt/tests/test.py

@@ -1,7 +1,9 @@
-import pygmt
 from matplotlib.testing.decorators import check_figures_equal
 
-@check_figures_equal(extensions=['png'])
+import pygmt
+
+
+@check_figures_equal(extensions=["png"])
 def test_plot(fig_test, fig_ref):
     fig_test.subplots().plot([1, 3, 5])
     fig_ref.subplots().plot([0, 1, 2], [1, 3, 5])

pygmt/tests/test_grdimage.py

@@ -98,9 +98,9 @@ def test_grdimage_over_dateline(xrgrid):
 
 def test_grdimage_central_longitude(grid):
     fig1 = Figure()
-    fig1.grdimage("@earth_relief_01d_g", projection="W120/15c", cmap='geo')
+    fig1.grdimage("@earth_relief_01d_g", projection="W120/15c", cmap="geo")
 
     fig2 = Figure()
-    fig2.grdimage(grid, projection="W120/15c", cmap='geo')
+    fig2.grdimage(grid, projection="W120/15c", cmap="geo")
 
     check_figures_equal(fig1, fig2)

pygmt/tests/test_testing.py

@@ -1,10 +1,11 @@
 """
 Test the testing functions for PyGMT
 """
+import pytest
+
 from .. import Figure
-from ..helpers.testing import check_figures_equal
 from ..exceptions import GMTImageComparisonFailure
-import pytest
+from ..helpers.testing import check_figures_equal
 
 
 def test_check_figures_equal():