Add rank function for ComparER_sub and fix getting wrong uid in BPR n…

…egative sampling for ComparER_sub and MTER (#515)

* Fixed changing sign if item j > item i, refactor code

* revert to numpy 1.20.3 for Py39

* Incorporate trade-off between rating and top aspect scores for ranking function

---------

Co-authored-by: lthoang <lthoang@apcs.vn>
Co-authored-by: tqtg <tuantq.vnu@gmail.com>

.github/workflows/python-package.yml

@@ -40,7 +40,7 @@ jobs:
 
     - name: Install numpy for Python 3.9
       if: matrix.python-version == '3.9'
-      run: python -m pip install numpy==1.21.6
+      run: python -m pip install numpy==1.20.3
 
     - name: Install numpy for Python 3.10
       if: matrix.python-version == '3.10'

.github/workflows/python-publish.yml

@@ -39,7 +39,7 @@ jobs:
 
     - name: Install numpy for Python 3.9
       if: matrix.python-version == '3.9'
-      run: python -m pip install numpy==1.21.6
+      run: python -m pip install numpy==1.20.3
 
     - name: Install numpy for Python 3.10
       if: matrix.python-version == '3.10'