git clone https://github.com/M4rtinK/modrana.git
cd modrana/
python modrana.py

Traceback (most recent call last):
  File "modrana.py", line 35, in <module>
    from core import modrana_log
  File "/home/user/modrana/core/modrana_log.py", line 30, in <module>
    from core import utils
  File "/home/user/modrana/core/utils.py", line 13, in <module>
    from core.backports.six import b
  File "/home/user/modrana/core/backports/six.py", line 610, in <module>
    viewkeys = operator.methodcaller("viewkeys")
AttributeError: 'module' object has no attribute 'methodcaller'

ERROR: 0:11: 'atan2' : no matching overloaded function found 
ERROR: 1 compilation errors.  No code generated.

[W] unknown:0 - QOpenGLShader::compile(Fragment): ERROR: 0:11: 'atan2' : no matching overloaded function found 
ERROR: 1 compilation errors.  No code generated.


[W] unknown:0 - *** Problematic Fragment shader source code ***
[W] unknown:0 - #ifndef GL_FRAGMENT_PRECISION_HIGH
#define highp mediump
#endif
#line 1

      uniform lowp float qt_Opacity;
      uniform highp float angleBase;
      uniform highp float angle;
      varying highp vec2 coord;
      void main() {
        gl_FragColor = vec4(0.0,0.0,0.0,0.0);
        highp vec2 d=2.0*coord-vec2(1.0,1.0);
        highp float r=length(d);
        if (0.66<=r && r<=0.92) {
          highp float a=atan2(d.x,-d.y);
          if (angleBase<=a && a<=angle) {
            highp float p=(a-angleBase)/(angle-angleBase);
            gl_FragColor = vec4(0.9,0.2,0.1,p) * qt_Opacity;
          }
        }
      }
[W] unknown:0 - ***
[W] unknown:0 - QQuickCustomMaterialShader: Shader compilation failed:
[W] unknown:0 - "ERROR: 0:11: 'atan2' : no matching overloaded function found \nERROR: 1 compilation errors.  No code generated.\n\n"