Mac os下Python3安装Django

1.查看pip版本 没有的话就是没安装成功 安装python的时候一般会自动安装pip

//pip版本 
pip -V //对应python2.7
pip 9.0.1 from /Library/Python/2.7/site-packages/pip-9.0.1-py2.7.egg (python 2.7)

pip3 -V //对应python3.6
pip 9.0.1 from /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (python 3.6)

2.用pip3/Python3安装Django，1.11.7是最新稳定版(官网download页面有 https://www.djangoproject.com/download )
这里注意用sudo 不然会报错

sudo pip3 install Django==1.11.7

提示 ：

Installing collected packages: Django
Found existing installation: Django 2.1.dev20171130142844 //之前用github下载安装的最新版，2.x 版本太高
Uninstalling Django-2.1.dev20171130142844:
Successfully uninstalled Django-2.1.dev20171130142844 //自动卸载掉之前的版本
Successfully installed Django-1.11.7 //安装成功

3.测试是否安装成功

cd /Users/z/PyP/Django

4.新建一个服务

sudo django-admin.py startproject testLocalHost

cd testLocalHost

5.运行服务，因为是用pip3/python3安装的Django 所以应该用python3来运行

python3 manage.py runserver

...xxx
.....xxx
django.db.utils.OperationalError: unable to open database file

报错了。

6.改用管理员权限运行：

sudo python3 manage.py runserver

打印：

Performing system checks...

System check identified no issues (0 silenced).

You have 13 unapplied migration(s). Your project may not work properly until you apply the migrations for app(s): admin, auth, contenttypes, sessions.
Run 'python manage.py migrate' to apply them.

December 01, 2017 - 08:33:50
Django version 1.11.7, using settings 'testLocalHost.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CONTROL-C.

成功，浏览器输入http://127.0.0.1:8000/可以看到

查看Django版本

import django

print(django.VERSION)

打印：(1, 11, 7, 'final', 0) 说明是1.11.7版本。

查看python3安装目录

import sys

print(sys.path)

打印xxxxxx /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6 xxxx 即是python3安装目录

pip3 安装目录：/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pip

pip 安装目录在默认python目录下

Django安装目录(用pip3安装) ：/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django