'python3.5'：无此类文件或目录

Question

I try to install my machine learning environment ( install all the library that I need) using Dockerfile : Here is the dockerfile :

# Build an image that can do training and inference in SageMaker
# This is a Python 2 image that uses the nginx, gunicorn, flask stack
# for serving inferences in a stable way.

FROM ubuntu:16.04

MAINTAINER Amazon AI <sage-learner@amazon.com>


RUN apt-get -y update && apt-get install -y --no-install-recommends \
         wget \
         python \
         nginx \
         ca-certificates \
    && rm -rf /var/lib/apt/lists/*

# Here we get all python packages.
# There's substantial overlap between scipy and numpy that we eliminate by
# linking them together. Likewise, pip leaves the install caches populated which uses
# a significant amount of space. These optimizations save a fair amount of space in the
# image, which reduces start up time.
RUN wget https://bootstrap.pypa.io/get-pip.py && python get-pip.py && \
    pip install numpy scipy scikit-learn pandas flask gevent gunicorn && \
        (cd /usr/local/lib/python2.7/dist-packages/scipy/.libs; rm *; ln ../../numpy/.libs/* .) && \
        rm -rf /root/.cache

# Set some environment variables. PYTHONUNBUFFERED keeps Python from buffering our standard
# output stream, which means that logs can be delivered to the user quickly. PYTHONDONTWRITEBYTECODE
# keeps Python from writing the .pyc files which are unnecessary in this case. We also update
# PATH so that the train and serve programs are found when the container is invoked.

ENV PYTHONUNBUFFERED=TRUE
ENV PYTHONDONTWRITEBYTECODE=TRUE
ENV PATH="/opt/program:${PATH}"

# Set up the program in the image
COPY xgboost /opt/program
WORKDIR /opt/program

But I get this error :

/usr/bin/env: 'python3.5': No such file or directory

Can you help me to solve this problem please?

Thank you

Answer 1

apt-get install python will always install Python 2. If you want Python 3, you need to apt-get install python3 .

(You might want to specify a versioned dependency if you require eg Python 3.5 specifically.)

Answer 2

In run command provide python version 3.5 explicitly If this do not work. Please keep note that this issue is because environment variables are not correctly set. Try to set them via hard coded Command using CMD or EXECUTE <"Linux Command">