小编use*_*858的帖子

我试图将遗留项目导入pycharm进行调试.目录结构如下所示:

顶级文件夹--->文件夹一

顶级文件夹--->文件夹二

问题是子文件夹中的程序使用:

 import top 
 from top import module  

Pycharm返回错误:"没有名为top的模块"

我怎样才能解决这个问题？

我无法在Mac OS X上重新启动postgres服务器.我该如何解决这个问题？

试过两种方式:

pg_ctl restart返回:

pg_ctl: PID file "usr/local/var/postgres:/postmaster.pid" does not exist
Is server running?
starting server anyway
pg_ctl: could not read file "usr/local/var/postgres:/postmaster.opts"

服务器不会重新启动

pg_ctl -D/usr/local/var/postgres restart导致:

   pg_ctl: PID file "/usr/local/var/postgres/postmaster.pid" does not exist
   Is server running?
   starting server anyway
   server starting
   LOG:  could not bind IPv4 socket: Address already in use
   HINT:  Is another postmaster already running on port 5432? If not, wait a few seconds and retry.
   LOG:  could not bind IPv6 socket: Address already in …

对于集合:

 data:
 { "_id" : ObjectId("57a"), "rep" : ObjectId("570"), "label" : "pat" }
 { "_id" : ObjectId("57b"), "rep" : ObjectId("571"), "label" : "pat" }

 rep:
 { "_id" : ObjectId("570") }
 { "_id" : ObjectId("571") }

db.rep.aggregate([{$ lookup:{from:"data",localField:"rep",foreignField:"_ id",as:"in_common"}}])

产生一个空集.

查询应该生成两行结果.

我怎样才能解决这个问题？