大约有 42,000 项符合查询结果（耗时：0.0436秒） [XML]
ImportError: No Module Named bs4 (BeautifulSoup)
I'm working in Python and using Flask. When I run my main Python file on my computer, it works perfectly, but when I activate venv and run the Flask Python file in the terminal, it says that my main Python file has "No Module Named bs4." Any comments or advice is greatly appreciated.
...
What does “Could not find or load main class” mean?
...
The java <class-name> command syntax
First of all, you need to understand the correct way to launch a program using the java (or javaw) command.
The normal syntax1 is this:
java [ <options> ] <class-name> [<arg> ...]
where &...
Creating an index on a table variable
...lly works:
declare @cmd varchar(500)='CREATE NONCLUSTERED INDEX [ix_temp'+cast(newid() as varchar(40))+'] ON #temp (NonUniqueIndexNeeded);';
exec (@cmd);
This insures the name is always unique even between simultaneous executions of the same procedure.
...
How can I make my own base image for Docker?
...
You can take a look at how the base images are created and go from there.
You can find them here: https://github.com/dotcloud/docker/tree/master/contrib.
There is mkimage-busybox.sh, mkimage-unittest.sh, mkimage-debian.sh
...
Excluding directory when creating a .tar.gz file
...
To exclude whole folder and its content: tar -pczvf MyBackup.tar.gz /home/user/public_html/ --exclude "/home/user/public_html/tmp/*"
– Dr.jacky
Nov 14 '16 at 6:08
...
RVM is not a function, selecting rubies with 'rvm use …' will not work
...
Your console is not running as a login shell and hence have no access to rvm function. If you are running Ubuntu, you can:
Open console
Select Edit -> Profile Preferences
Select tab: Title and Command
Check box 'Run command as a login shell'
Restart terminal
...
Is unsigned integer subtraction defined behavior?
...ake sure that the result is signed, then stored it into signed variable or cast it to signed. When you want to get the difference between numbers and make sure that the modular arithmetic will not be applied, then you should consider using abs() function defined in stdlib.h:
int c = five - seven; ...
Code Wrap IntelliJ?
...doesn't have a shortcut by default, but you can assign one in the keymap.
AndroidStudio >= 1.4.1: the options are under File > Settings > Editor > General - under the Soft Wraps sub-group.
You can also right click the gutter (the vertical bar where line number is shown) and select "Use...
Is mongodb running?
I have installed mongodb and the php drivers on my unix server.
9 Answers
9
...
Does const mean thread-safe in C++11?
...thread-safe since no writes are possible (and if you are considering const_cast-ing something originally declared const then you get undefined-behavior and that's it).
So what does it mean then?
Let's assume --for the sake of argument-- that multiplication operations are extremely costly and we be...