小编Hum*_*ang的帖子

好吧,我正在写一个烧瓶项目,但是当我试图python manage.py
追溯时,追溯告诉我:

Traceback (most recent call last):
  File "manage.py", line 5, in <module>
    from app import db,create_app
  File "/home/humbert/2017-sharing-backend/sharing/app/__init__.py", line 42, in <module>
    app.register_blueprint(main_blueprint, url_prefix='/main')
  File "/home/humbert/venv/local/lib/python2.7/site-packages/flask/app.py", line 64, in wrapper_func
    return f(self, *args, **kwargs)
  File "/home/humbert/venv/local/lib/python2.7/site-packages/flask/app.py", line 951, in register_blueprint
    blueprint.register(self, options, first_registration)
  File "/home/humbert/venv/local/lib/python2.7/site-packages/flask/blueprints.py", line 154, in register
    deferred(state)
  File "/home/humbert/venv/local/lib/python2.7/site-packages/flask/blueprints.py", line 173, in <lambda>
    s.add_url_rule(rule, endpoint, view_func, **options))
  File "/home/humbert/venv/local/lib/python2.7/site-packages/flask/blueprints.py", line 76, in add_url_rule
    view_func, defaults=defaults, **options)
  File "/home/humbert/venv/local/lib/python2.7/site-packages/flask/app.py", line 64, in wrapper_func
    return f(self, …

我在编写 FitsBits 很长时间时遇到了一些问题，所以我用谷歌搜索了它，并找到了一个适合测试程序的解决方案，但我无法弄清楚这意味着什么。

问题描述：

fitsBits - 如果 x 可以表示为 n 位二进制补码整数，则返回 1。
1 <= n <= 32
示例：

fitsBits(5,3) = 0, fitsBits(-4,3) = 1
合法操作：！~ & ^ | + << >> 最大操作数：15

正确的解决方案是：

int fitsBits(int x, int n)
{   
int move;  
move = 32 +(~n+1);
return !(x^((x<<move)>>move)); 
}

但我不知道

!( x ^ ( ( x<< 移动 ) >> 移动 ) )

意味着什么。

我真的需要一些帮助。谢谢！