move Python package installations to requirements file

Author: rongxin-liu

Dockerfile

@@ -18,40 +18,14 @@ RUN apt-get update -qq && apt-get install -y \
 # Dependencies for OpenCV
 RUN apt-get install -y libgl1
 
-# Install additional Python packages
-RUN pip3 install --no-cache-dir \
-    flask_sqlalchemy \
-    numpy \
-    pandas \
-    passlib \
-    plotly \
-    pytz \
-    cachelib \
-    cffi \
-    inflect \
-    emoji \
-    pyfiglet \
-    multipledispatch \
-    Pillow==10.4.0 \
-    tabulate \
-    validators \
-    validator-collection \
-    fpdf2==2.8.2
-
-# Install ML packages for CS50 AI
-RUN pip3 install --no-cache-dir \
-    nltk \
-    opencv-python \
-    scikit-learn \
-    tf-nightly \
-    transformers==4.35.0
+# Install Python packages from requirements file
+COPY dependencies/python/requirements.txt /tmp/requirements.txt
+RUN pip3 install --no-cache-dir -r /tmp/requirements.txt && \
+    rm /tmp/requirements.txt
 
 # Install nltk data
 RUN python3 -c "import nltk; nltk.download('punkt_tab', download_dir='/usr/share/nltk_data/')"
 
-# Install CS50 Python packages
-RUN pip3 install cs50 --upgrade --no-cache-dir
-
 # Install R and dependencies for tidyverse library
 RUN apt-get update -qq && apt-get install -y \
     automake \

dependencies/python/requirements.txt

@@ -0,0 +1,29 @@
+# Additional Python packages
+cachelib==0.13.0
+cffi==1.17.1
+emoji==2.14.1
+Flask-SQLAlchemy==3.1.1
+fpdf2==2.8.3
+inflect==7.5.0
+multipledispatch==1.0.0
+numpy==2.3.2
+pandas==2.3.1
+passlib==1.7.4
+Pillow==11.3.0
+plotly==6.2.0
+pyfiglet==1.0.3
+pytz==2025.2
+tabulate==0.9.0
+validator-collection==1.5.0
+validators==0.35.0
+
+# ML packages for CS50 AI
+nltk==3.9.1
+opencv-python
+scikit-learn==1.7.1
+tf-nightly==2.21.0.dev20250801
+tf-keras
+transformers==4.35.0
+
+# CS50 Python packages
+cs50==9.4.0