Use a requirements file to specify python dependencies

Reviewed By: rbgirshick

Differential Revision: D8117250

fbshipit-source-id: 1cd6e033c3ed3057afeeb92ed86a20d807549b5a

Author: ir413

INSTALL.md

@@ -33,12 +33,6 @@ If the `caffe2` Python package is not found, you likely need to adjust your `PYT
 
 ## Other Dependencies
 
-Install Python dependencies:
-
-```
-pip install numpy>=1.13 pyyaml>=3.12 matplotlib opencv-python>=3.2 setuptools Cython mock scipy
-```
-
 Install the [COCO API](https://github.com/cocodataset/cocoapi):
 
 ```
@@ -63,6 +57,12 @@ Clone the Detectron repository:
 git clone https://github.com/facebookresearch/detectron $DETECTRON
 ```
 
+Install Python dependencies:
+
+```
+pip install -r $DETECTRON/requirements.txt
+```
+
 Set up Python modules:
 
 ```

docker/Dockerfile

@@ -7,17 +7,17 @@ ENV Caffe2_DIR /usr/local/caffe2_build
 ENV PYTHONPATH /usr/local/caffe2_build:${PYTHONPATH}
 ENV LD_LIBRARY_PATH /usr/local/caffe2_build/lib:${LD_LIBRARY_PATH}
 
+# Clone the Detectron repository
+RUN git clone https://github.com/facebookresearch/detectron /detectron
+
 # Install Python dependencies
-RUN pip install numpy>=1.13 pyyaml>=3.12 matplotlib opencv-python>=3.2 setuptools Cython mock scipy
+RUN pip install -r /detectron/requirements.txt
 
 # Install the COCO API
 RUN git clone https://github.com/cocodataset/cocoapi.git /cocoapi
 WORKDIR /cocoapi/PythonAPI
 RUN make install
 
-# Clone the Detectron repository
-RUN git clone https://github.com/facebookresearch/detectron /detectron
-
 # Go to Detectron root
 WORKDIR /detectron
 

requirements.txt

@@ -0,0 +1,8 @@
+numpy>=1.13
+pyyaml>=3.12
+matplotlib
+opencv-python>=3.2
+setuptools
+Cython
+mock
+scipy