skpkg: mirate src folder

Author: tinatn29

src/diffpy/__init__.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 ##############################################################################
 #
-# (c) 2022-2025 The Trustees of Columbia University in the City of New York.
+# (c) 2025 The Trustees of Columbia University in the City of New York.
 # All rights reserved.
 #
 # File coded by: Billinge Group members and community contributors.
@@ -12,11 +12,3 @@
 # See LICENSE.rst for license information.
 #
 ##############################################################################
-"""Blank namespace package for module diffpy."""
-
-
-from pkgutil import extend_path
-
-__path__ = extend_path(__path__, __name__)
-
-# End of file

src/diffpy/fourigui/__init__.py

@@ -1,10 +1,10 @@
 #!/usr/bin/env python
 ##############################################################################
 #
-# (c) 2022-2025 The Trustees of Columbia University in the City of New York.
+# (c) 2025 The Trustees of Columbia University in the City of New York.
 # All rights reserved.
 #
-# File coded by: Billinge Group members and community contributors.
+# File coded by: Billinge Group members.
 #
 # See GitHub contributions for a more detailed list of contributors.
 # https://github.com/diffpy/diffpy.fourigui/graphs/contributors
@@ -15,7 +15,7 @@
 """Tool for visualizing 3D diffraction and PDF images."""
 
 # package version
-from diffpy.fourigui.version import __version__
+from diffpy.fourigui.version import __version__  # noqa
 
 # silence the pyflakes syntax checker
 assert __version__ or True

src/diffpy/fourigui/functions.py

@@ -0,0 +1,31 @@
+import numpy as np
+
+
+def dot_product(a, b):
+    """Compute the dot product of two vectors of any size.
+
+    Ensure that the inputs, a and b, are of the same size.
+    The supported types are "array_like" objects, which can
+    be converted to a NumPy array. Examples include lists and tuples.
+
+    Parameters
+    ----------
+    a : array_like
+        The first input vector.
+    b : array_like
+        The second input vector.
+
+    Returns
+    -------
+    float
+        The dot product of the two vectors.
+
+    Examples
+    --------
+    Compute the dot product of two lists:
+    >>> a = [1, 2, 3]
+    >>> b = [4, 5, 6]
+    >>> dot_product(a, b)
+    32.0
+    """
+    return float(np.dot(a, b))

src/diffpy/fourigui/version.py

@@ -1,13 +1,13 @@
 #!/usr/bin/env python
 ##############################################################################
 #
-# (c) 2022-2025 The Trustees of Columbia University in the City of New York.
+# (c) 2025 The Trustees of Columbia University in the City of New York.
 # All rights reserved.
 #
-# File coded by: Billinge Group members and community contributors.
+# File coded by: Billinge Group members.
 #
 # See GitHub contributions for a more detailed list of contributors.
-# https://github.com/diffpy/diffpy.fourigui/graphs/contributors
+# https://github.com/diffpy/diffpy.fourigui/graphs/contributors  # noqa: E501
 #
 # See LICENSE.rst for license information.
 #