django-admin.py startproject HelloWorld

Python 3.7.1 (v3.7.1:260ec2c36a, Oct 20 2018, 14:57:15) [MSC v.1915 64 bit (AMD64)] on win32
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>>> import django
>>> django.get_version()
'3.0'
>>> django-admin.py startproject HelloWorld
  File "<stdin>", line 1
    django-admin.py startproject HelloWorld
                               ^
SyntaxError: invalid syntax
>>>

跟着教程新建一个项目，使用命令django-admin.py startproject HelloWorld
结果报错了，

正确做法：
把原命令的.py去掉即可
django-admin startproject HelloWorld