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How to do a scatter plot with empty circles in Python?
... Very helpful. It's markerfacecolor='none', this is the way it's now.
– hesham_EE
May 28 '15 at 3:16
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Running unittest with typical test directory structure
... Python 2.7+ (which is backported as unittest2 for Python 2.6 and earlier) now has test discovery built-in, so nose is no longer necessary if you want automated test discovery: your user instructions can be as simple as python -m unittest discover.
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Difference between BeautifulSoup and Scrapy crawler?
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I think both are good... im doing a project right now that use both. First i scrap all the pages using scrapy and save that on a mongodb collection using their pipelines, also downloading the images that exists on the page.
After that i use BeautifulSoup4 to make a pos-proce...
How to permanently add a private key with ssh-add on Ubuntu? [closed]
... a specific key and if it doesn't find it, then it adds it with ssh-add.
Now the first time I open my terminal I'm asked for the passwords for my private keys and I'm not asked again until I reboot(or logout - I haven't checked) my computer.
Since I have a bunch of keys I store the output of ssh-...
What's the best way of implementing a thread-safe Dictionary?
... the enumerating of the members. The problem with this is that you don't know if the action passed to that function calls some member of your dictionary (that would result in a deadlock). Exposing the synchronization object allows the consumer to make those decisions and doesn't hide the deadlock ...
Hidden Features of Java
...d it, never heard of it before.
ThreadLocals are typically not so widely known as a way to store per-thread state.
Since JDK 1.5 Java has had extremely well implemented and robust concurrency tools beyond just locks, they live in java.util.concurrent and a specifically interesting example is the j...
Deleting elements from std::set while iterating
...M. It does in C++11. In C++17, it takes iterator (const_iterator in C++11) now.
– tartaruga_casco_mole
Jan 23 '18 at 4:15
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Is there a standard sign function (signum, sgn) in C/C++?
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@GMan: GCC only just now (4.5) stopped having cost quadratic to the number of instantiations for template functions, and they are still drastically more expensive to parse and instantiate than manually written functions or the standard C preproce...
Is it possible to modify variable in python that is in outer, but not global, scope?
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Until now, I already have two python tips that are simple, but very helpful: yours is the second one :) Thanks @kindall!
– swdev
Sep 22 '14 at 23:35
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Primary key or Unique index?
...e a composed primary key (person_id, car_id)?
– unbeknown
Jan 28 '09 at 12:20
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primary key (pers...