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Why does running the Flask dev server run itself twice?
I'm using Flask for developing a website and while in development I run flask using the following file:
6 Answers
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os.path.dirname(__file__) returns empty
...ath.basename(filename) == filename
Both dirname() and basename() only split the passed filename into components without taking into account the current directory. If you want to also consider the current directory, you have to do so explicitly.
To get the dirname of the absolute path, use
os.pa...
Aren't Python strings immutable? Then why does a + “ ” + b work?
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It's even more convincing to try something like x = 'abc'; x[1] = 'x' in the Python repl
– xpmatteo
May 23 '17 at 6:11
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What is time_t ultimately a typedef to?
... typedef defined in the standard
header. ISO C defines
time_t as an arithmetic type, but does
not specify any particular type,
range, resolution, or encoding for it.
Also unspecified are the meanings of
arithmetic operations applied to time
values.
Unix and POSIX-compliant system...
Why do people use __(double underscore) so much in C++
...`_') are often used in names of library functions (such as "_main" and "_exit"). In order to avoid collisions, do not begin an identifier with an underscore.
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Real world example about how to use property feature in python?
...calls, etc
# all results in an angle set in 'some_angle'
# It could also reference a cache, remote or otherwise,
# that holds the latest value for this angle
return some_angle
>>> f = PDB_Calculator()
>>> angle = f.protein_folding_angle
>>>...
setup.py examples?
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Complete walkthrough of writing setup.py scripts here. (with some examples)
If you'd like a real-world example, I could point you towards the setup.py scripts of a couple major projects. Django's is here, pyglet's is here. You can just browse the sou...
Python threading.timer - repeat function every 'n' seconds
...t too knowledgeable of how Python threads work and am having difficulties with the python timer.
12 Answers
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How do you build a Singleton in Dart?
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Thanks to Dart's factory constructors, it's easy to build a singleton:
class Singleton {
static final Singleton _singleton = Singleton._internal();
factory Singleton() {
return _singleton;
}
Singleton._internal();
}
You can construct it like this
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PowerShell Script to Find and Replace for all Files with a Specific Extension
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Here a first attempt at the top of my head.
$configFiles = Get-ChildItem . *.config -rec
foreach ($file in $configFiles)
{
(Get-Content $file.PSPath) |
Foreach-Object { $_ -replace "Dev", "Demo" } |
Set-Content $file.PSPath
}
...