Sleep for milliseconds
Note that there is no standard C API for milliseconds, so (on Unix) you will have to settle for usleep, which accepts microseconds:
Maximum call stack size exceeded error
It means that somewhere in your code, you are calling a function which in turn calls another function and so forth, until you hit the call stack limit. This is almost always because of a recursive function with a base case that isn’t being met. Viewing the stack Consider this code… Here is the stack … Read more
Curve curvature in numpy
EDIT: I put together this answer off and on over a couple of hours, so I missed your latest edits indicating that you only needed curvature. Hopefully, this answer will be helpful regardless. Other than doing some curve-fitting, our method of approximating derivatives is via finite differences. Thankfully, numpy has a gradient method that does these difference calculations for us, … Read more
Failed to load resource: the server responded with a status of 404 (Not Found) css
you have defined the public dir in app root/public so you have to use:
How to download Visual Studio Community Edition 2017 (not 2019)
I figured out how to do it. I post the solution in case someone else has the same problem. You just need to access https://visualstudio.microsoft.com/vs/older-downloads/ and If you get the same message than me, just join to the Visual Studio Dev Essentials (in the same page is a link to do it), it is free, and then … Read more
How do I list all files of a directory?
os.listdir() will get you everything that’s in a directory – files and directories. If you want just files, you could either filter this down using os.path: or you could use os.walk() which will yield two lists for each directory it visits – splitting into files and dirs for you. If you only want the top directory you can break the first time it yields or, shorter:
How to convert a string to an integer in JavaScript?
The simplest way would be to use the native Number function: If that doesn’t work for you, then there are the parseInt, unary plus, parseFloat with floor, and Math.round methods. parseInt: unary plus if your string is already in the form of an integer: if your string is or might be a float and you want an integer: or, if you’re going … Read more
What does ‘git blame’ do?
From git-blame: Annotates each line in the given file with information from the revision which last modified the line. Optionally, start annotating from the given revision. When specified one or more times, -L restricts annotation to the requested lines. Example: Please note that git blame does not show the per-line modifications history in the chronological sense. It only … Read more
Python Math – TypeError: ‘NoneType’ object is not subscriptable
This should be The .sort() method is in-place, and returns None. If you want something not in-place, which returns a value, you could use Aside #1: please don’t call your lists list. That clobbers the builtin list type. Aside #2: I’m not sure what this line is meant to do: is it simply ? In other words, I … Read more
How to send an email with Python?
I recommend that you use the standard packages email and smtplib together to send email. Please look at the following example (reproduced from the Python documentation). Notice that if you follow this approach, the “simple” task is indeed simple, and the more complex tasks (like attaching binary objects or sending plain/HTML multipart messages) are accomplished very rapidly. For sending email … Read more