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How to fix “Attempted relative import in non-package” even with __init__.py
...e fact that you need __init__.pys all the way down, and the __package__-modifying trickery (described below by BrenBarn) needed to allow these imports for executable scripts (e.g. when using a shebang and doing ./my_script.py at the Unix shell) would all be useful. This whole issue was quite tricky ...
Nullable Foreign Key bad practice?
Let's say you have a table Orders with a foreign key to a Customer Id. Now, suppose you want to add an Order without a Customer Id, (whether that should be possible is another question) you would have to make the foreign key NULL... Is that bad practice or would you rather work with a link table bet...
In PowerShell, how do I define a function in a file and call it from the PowerShell commandline?
... your functions in it to MyFunctions.psm1 (you've just created a module!). Now for a module to load properly, you have to do some specific things with the file. First for Import-Module to see the module (you use this cmdlet to load the module into the shell), it has to be in a specific location. The...
Multi-line string with extra space (preserved indentation)
...
If you're trying to get the string into a variable, another easy way is something like this:
USAGE=$(cat <<-END
This is line one.
This is line two.
This is line three.
END
)
If you indent your string with...
Get name of current script in Python
... main module, this is the name of the script that was originally invoked.
If you want to omit the directory part (which might be present), you can use os.path.basename(__file__).
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How to build & install GLFW 3 and use it in a Linux project
...d them already. (See the -l options given to the g++ linker stage, below.)
Now you can type make and then make install, which will probably require you to sudo first.
Okay, you should get some verbose output on the last three CMake stages, telling you what has been built or where it has been placed....
What __init__ and self do on Python?
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what if you put x = 'Hello' outside init but inside the class? is it like java where it's the same, or does it become like a static variable which is only initialised once?
– Jayen
Apr 9 '12...
Plot correlation matrix into a graph
I have a matrix with some correlation values. Now I want to plot that in a graph that looks more or less like that:
11 Answ...
VS 2010 Test Runner error “The agent process was stopped while the test was running.”
...m: some tests fail and they are different in different test runs. I don't know exactly the reason why it happens, but it began to occur when I added a finalizer to one of my classes. When I disable the finalizer - the problem disappears. When I turn the finalizer on - the problem comes back.
Right ...
Regex Pattern to Match, Excluding when… / Except between
...match temperature unless italicized"...
Sadly, the technique is not well known: I estimate that in twenty SO questions that could use it, only one has one answer that mentions it—which means maybe one in fifty or sixty answers. See my exchange with Kobi in the comments. The technique is described...