remvoe module level docstring and fix ruff check issues

Author: zhengp0

src/xspline/__init__.py

@@ -1,10 +1,19 @@
-# -*- coding: utf-8 -*-
-"""
-xspline
-~~~~~~~
-
-xspline package
-"""
-
 from . import utils
-from .core import *
+from .core import (
+    NDXSpline,
+    XSpline,
+    bspline_dfun,
+    bspline_domain,
+    bspline_fun,
+    bspline_ifun,
+)
+
+__all__ = [
+    "utils",
+    "bspline_domain",
+    "bspline_fun",
+    "bspline_dfun",
+    "bspline_ifun",
+    "XSpline",
+    "NDXSpline",
+]

src/xspline/core.py

@@ -1,11 +1,3 @@
-# -*- coding: utf-8 -*-
-"""
-core
-~~~~
-
-core module contains main functions and classes.
-"""
-
 import numpy as np
 
 from . import utils

src/xspline/utils.py

@@ -1,4 +1,3 @@
-# utility functions for the bsplinex class
 import functools
 import math
 

tests/test_core.py

@@ -1,11 +1,3 @@
-# -*- coding: utf-8 -*-
-"""
-test
-~~~~~~~~~
-
-unit tests for xspline.core
-"""
-
 import numpy as np
 import pytest
 

tests/test_ndxspline.py

@@ -1,11 +1,3 @@
-# -*- coding: utf-8 -*-
-"""
-test_xspline
-~~~~~~~~~~~~
-
-Test XSpline class.
-"""
-
 import numpy as np
 import pytest
 

tests/test_utils.py

@@ -1,11 +1,3 @@
-# -*- coding: utf-8 -*-
-"""
-test_utils
-~~~~~~~~~~
-
-unit tests for xspline.utils
-"""
-
 import numpy as np
 import pytest
 

tests/test_xspline.py

@@ -1,11 +1,3 @@
-# -*- coding: utf-8 -*-
-"""
-test_xspline
-~~~~~~~~~~~~
-
-Test XSpline class.
-"""
-
 import numpy as np
 import pytest
 
@@ -106,7 +98,7 @@ def test_ifun(knots, degree, order, idx, l_linear, r_linear, l_extra, r_extra):
         x = np.linspace(xs.knots[0] - 1.0, xs.knots[1], 101)
     else:
         x = np.linspace(xs.knots[-2], xs.knots[-1], 101)
-    my_iy = xs.ifun(x[0], x, order, idx, l_extra=l_extra, r_extra=r_extra)
+    _ = xs.ifun(x[0], x, order, idx, l_extra=l_extra, r_extra=r_extra)
 
     domain = xs.domain(idx, l_extra=l_extra, r_extra=r_extra)
     lb = domain[0]