importnumpyasnpimportmatplotlib.pyplotaspltfig=plt.figure(dpi=120)ax=fig.add_axes([0.1,0.1,0.8,0.8],polar=True)ax.set_theta_zero_location('N')ax.set_theta_direction(-1)# anti-clockwiseax.set_ylim(90,-45)ax.set_yticks(np.arange(-45,90+0.1,15))plt.show()

 ⌘  python3 bug_test.pyposx and posy should be finite valuesposx and posy should be finite valuesposx and posy should be finite valuesposx and posy should be finite valuesposx and posy should be finite valuesposx and posy should be finite valuesposx and posy should be finite valuesposx and posy should be finite values/Users/chufyrev/.local/share/virtualenvs/test-TGICRGwR/lib/python3.6/site-packages/numpy/core/_methods.py:29: RuntimeWarning: invalid value encountered in reduce  return umr_minimum(a, axis, None, out, keepdims)/Users/chufyrev/.local/share/virtualenvs/test-TGICRGwR/lib/python3.6/site-packages/numpy/core/_methods.py:26: RuntimeWarning: invalid value encountered in reduce  return umr_maximum(a, axis, None, out, keepdims)posx and posy should be finite valuesposx and posy should be finite valuesposx and posy should be finite valuesposx and posy should be finite valuesposx and posy should be finite valuesposx and posy should be finite valuesposx and posy should be finite valuesposx and posy should be finite valuesposx and posy should be finite values