[Docker] docker-composeでDjangoの開発環境構築

Dockerfile

FROM python:3

ENV PYTHONUNBUFFERED 1

RUN mkdir /code

WORKDIR /code

COPY requirements.txt /code/

RUN pip install -r requirements.txt

COPY . /code/

requirements.txt

Django==2.0
psycopg2

docker-compose.yml

version: '3'
services:
  db:
    image: postgres
  web:
    build: .
    command: python3 manage.py runserver 0.0.0.0:8000
    volumes:
      - .:/code
    ports:
      - "8000:8000"
    depends_on:
      - db

$ sudo docker-compose run web django-admin.py startproject webpj .
AttributeError: module ‘collections’ has no attribute ‘Iterator’

なんやこれーーーーーーーー