Question: In the below docker file:

```
FROM alpine:latest

ENV HOME /home/samcli
ENV PATH $HOME/.local/bin:$PATH

RUN mkdir /root/bin /aws; \
    apk add --no-cache groff less bash python jq curl py-pip tzdata

RUN ln -fs /usr/share/zoneinfo/Etc/UTC /etc/localtime

RUN apk add --no-cache --virtual .build-deps gcc python2-dev python3-dev linux-headers musl-dev && \
    pip install --upgrade pip; \
    adduser samcli -Du 5566; \
    chown -R samcli $HOME;

USER samcli

WORKDIR $HOME

RUN pip install --user --upgrade awscli aws-sam-cli;

USER root

RUN apk del .build-deps; \
    rm -rf /var/cache/apk/*

```

---

Layer(`RUN pip install --user --upgrade awscli aws-sam-cli;`) is installing with python 2.7, despite image has python3.7 installed.

I see below deprecation error when installing python package:

`Step 9/11 : RUN pip install --user --upgrade awscli aws-sam-cli;`

`DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/`

---

How to install aws package with python3.7?
 because below command is using python2

`pip install --user --upgrade awscli aws-sam-cli;`

Answer: 
I would recommend using python offical image based on alpine so you will do not need to maintain and install the python version. Below base image is base on `alpine 3.9` and `python version is 3.7`

```
FROM python:3.7-alpine3.9

ENV HOME /home/samcli
ENV PATH $HOME/.local/bin:$PATH
RUN ln -fs /usr/share/zoneinfo/Etc/UTC /etc/localtime
RUN apk add --no-cache --virtual .build-deps python2-dev  python3-dev gcc linux-headers musl-dev && \
    adduser samcli -Du 5566; \
    chown -R samcli $HOME;
RUN apk add --no-cache groff less bash jq curl py-pip tzdata
USER samcli

WORKDIR $HOME

RUN pip install --user --upgrade awscli aws-sam-cli;
USER root

RUN apk del .build-deps; \
    rm -rf /var/cache/apk/*

```
This Dockerfile works for me.

```
FROM alpine:latest

RUN apk update && apk upgrade

RUN apk --no-cache add python3 py3-pip gcc musl-dev python3-dev

RUN pip install aws-sam-cli awscli

...

```