No opencv_python>=3.2 for python2

[wadefelix]

there is no opencv_python>=3.2 for python2 ,see https://pypi.python.org/pypi/opencv-python

INSTALL.md

Requirements:

• NVIDIA GPU, Linux, Python2

Other Dependencies
Install Python dependencies:
pip install numpy>=1.13 pyyaml>=3.12 matplotlib opencv-python>=3.2 setuptools Cython mock scipy

[wadefelix]

#222
#110

[rbgirshick]

3.4 certainly seems >= 3.2. Maybe try with quotes, as in pip install "opencv-python>=3.2"?