Flang | A Scheme dialect written in Golang | Interpreter library

Try changing lcompilers to compilers. It's just a typo error.

This is not an answer directly related to the quicksort algorithm but rather on how to implement type-bound operators.

You can move the compare function inside the data_model module. This decouples the modules further s.t. the quicksort module only contains the quicksort algorithm.

The compare function can be implemented by a type-bound operator operator(<). The following shows a quick implementation (only for year/month/day) and it should help you to edit your own code accordingly.

You don't have any compiler on your system, so PyPy can't compile the packages.

notice the line error: Microsoft Visual C++ 14.0 is required. Get it with "Build Tools for Visual Studio": https://visualstudio.microsoft.com/downloads/

Download the compiler with default settings and try again.

If I understand correctly, your mistake is that you are cycling over the dictionary for every value in the list of sizes, why?

The idea of a dictionary is that when you have a value that matches a key, you can get the matching value from the dictionary.

Also, there is no need to call sizes twice to receive the same values, save the result before and then use that.

The scipy project prepares binary-wheels to make installing easier for the end-users as compilation from sources is a huge pain (C, C++, Fortran, BLAS/LAPACK and more complications).

Installing from sources is very hard (especially on windows) and is actually needed if there are no binaries available! It's really hard...

In your case, you are out of luck. scipy 1.1.0 was released when python 3.9 was not around and therefore the only binary-wheels available for 1.1.0 are:

• Python 2.7
• Python 3.4, 3.5, 3.6

Only using one of those Python versions you would get binary-wheels when selecting scipy 1.1.0. Otherwise, the installer tries to compile from sources (which won't do without a lot of preparation).

So do one of the following:

• A: relax your selection/preference of scipy-version
• B: relax your selection/preference of python-version
• C: go for linux and install from sources
• D: not recommended: prepare your windows to be able to install from sources

I came up with this solution that requires modifying the Revolute joint.
This is a minimal library with the modified Revolute Joint and a minimal example

Basically I just required that the torque on frame_a and frame_b is equal only along two directions orthogonal to the revolute axis (before they were equal along any direction).
And the torque called 'tau' provided by the auxiliary flange is applied along revolute axis direction only to frame_b, while for frame_a along this direction the torque is imposed to be zero.

This makes much more sense to me, but I'll be glad if someone proves me wrong.

As @tbeu just saw, I also sent an issue to the Modelica Standard Library GitHub, so it might be worth to wait for some official answer.

Try with this tag:

I was able to find a solution to my problem and I want to share it with you. The problem was not a programming error, but the paper provided an incorrect matrix (the Ai matrix) which is needed to solve the linear system of equations. I tried to extract a system of linear equations from M*X - Y*N = 0 by myself using the characteristics of homogeneous transformation matrices and rotation matrices. I came up with following solution:

where

The vector bi provided in the paper is fine.

Since Prof. Ernst teaches at my university and I'm taking a course with him, I will try to make him aware of the mistake.

Try updating the setup tools by