'python3.5'：无此类文件或目录

Question

我尝试使用Dockerfile安装我的机器学习环境（安装所需的所有库）：这是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

但是我得到这个错误：

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

您能帮我解决这个问题吗？

谢谢

Answer 1

apt-get install python将始终安装Python2。如果要Python 3，则需要apt-get install python3 。

（如果您需要例如Python 3.5，则可能要指定版本化的依赖项。）

Answer 2

在运行命令中，显式提供python 3.5版。 请注意，此问题是因为未正确设置环境变量。 尝试使用CMD或EXECUTE <“ Linux Command”>通过硬编码的Command设置它们