Closed
Description
Bug report
Bug summary
I get OSError: Too many levels of Symbolic links exception when I run the lorenz_attractor mplot3d example from the matplotlib gallery using matplotlib version 3.0.0 but the error disappears when I use version 2.2.3
Code for reproduction
#
#
# Plot of the Lorenz Attractor based on Edward Lorenz's 1963 "Deterministic
# Nonperiodic Flow" publication.
# http://journals.ametsoc.org/doi/abs/10.1175/1520-0469%281963%29020%3C0130%3ADNF%3E2.0.CO%3B2
#
# Note: Because this is a simple non-linear ODE, it would be more easily
# done using SciPy's ode solver, but this approach depends only
# upon NumPy.
import numpy as np
import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import Axes3D
def lorenz(x, y, z, s=10, r=28, b=2.667):
x_dot = s*(y - x)
y_dot = r*x - y - x*z
z_dot = x*y - b*z
return x_dot, y_dot, z_dot
dt = 0.01
stepCnt = 10000
# Need one more for the initial values
xs = np.empty((stepCnt + 1,))
ys = np.empty((stepCnt + 1,))
zs = np.empty((stepCnt + 1,))
# Setting initial values
xs[0], ys[0], zs[0] = (0., 1., 1.05)
# Stepping through "time".
for i in range(stepCnt):
# Derivatives of the X, Y, Z state
x_dot, y_dot, z_dot = lorenz(xs[i], ys[i], zs[i])
xs[i + 1] = xs[i] + (x_dot * dt)
ys[i + 1] = ys[i] + (y_dot * dt)
zs[i + 1] = zs[i] + (z_dot * dt)
fig = plt.figure()
ax = fig.gca(projection='3d')
ax.plot(xs, ys, zs, lw=0.5)
ax.set_xlabel("X Axis")
ax.set_ylabel("Y Axis")
ax.set_zlabel("Z Axis")
ax.set_title("Lorenz Attractor")
plt.show()Actual outcome
Traceback (most recent call last):
File "/Users/kkeshava/Downloads/Analysis_tools/miniconda3/lib/python3.6/site-packages/matplotlib/font_manager.py", line 1353, in <module>
fontManager = json_load(_fmcache)
File "/Users/kkeshava/Downloads/Analysis_tools/miniconda3/lib/python3.6/site-packages/matplotlib/font_manager.py", line 888, in json_load
with open(filename, 'r') as fh:
FileNotFoundError: [Errno 2] No such file or directory: '/Users/kkeshava/.matplotlib/fontlist-v300.json'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "lorenz_attractor.py", line 10, in <module>
import matplotlib.pyplot as plt
File "/Users/kkeshava/Downloads/Analysis_tools/miniconda3/lib/python3.6/site-packages/matplotlib/pyplot.py", line 32, in <module>
import matplotlib.colorbar
File "/Users/kkeshava/Downloads/Analysis_tools/miniconda3/lib/python3.6/site-packages/matplotlib/colorbar.py", line 32, in <module>
import matplotlib.contour as contour
File "/Users/kkeshava/Downloads/Analysis_tools/miniconda3/lib/python3.6/site-packages/matplotlib/contour.py", line 18, in <module>
import matplotlib.font_manager as font_manager
File "/Users/kkeshava/Downloads/Analysis_tools/miniconda3/lib/python3.6/site-packages/matplotlib/font_manager.py", line 1363, in <module>
_rebuild()
File "/Users/kkeshava/Downloads/Analysis_tools/miniconda3/lib/python3.6/site-packages/matplotlib/font_manager.py", line 1344, in _rebuild
fontManager = FontManager()
File "/Users/kkeshava/Downloads/Analysis_tools/miniconda3/lib/python3.6/site-packages/matplotlib/font_manager.py", line 978, in __init__
ttffiles = findSystemFonts(paths) + findSystemFonts()
File "/Users/kkeshava/Downloads/Analysis_tools/miniconda3/lib/python3.6/site-packages/matplotlib/font_manager.py", line 270, in findSystemFonts
fontfiles.update(OSXInstalledFonts(fontext=fontext))
File "/Users/kkeshava/Downloads/Analysis_tools/miniconda3/lib/python3.6/site-packages/matplotlib/font_manager.py", line 218, in OSXInstalledFonts
for directory in directories
File "/Users/kkeshava/Downloads/Analysis_tools/miniconda3/lib/python3.6/site-packages/matplotlib/font_manager.py", line 220, in <listcomp>
for path in list_fonts(directory, ext)]
File "/Users/kkeshava/Downloads/Analysis_tools/miniconda3/lib/python3.6/site-packages/matplotlib/font_manager.py", line 157, in list_fonts
for path in filter(Path.is_file, Path(directory).glob("**/*.*"))
File "/Users/kkeshava/Downloads/Analysis_tools/miniconda3/lib/python3.6/site-packages/matplotlib/font_manager.py", line 156, in <listcomp>
return [str(path)
File "/Users/kkeshava/Downloads/Analysis_tools/miniconda3/lib/python3.6/pathlib.py", line 1360, in is_file
return S_ISREG(self.stat().st_mode)
File "/Users/kkeshava/Downloads/Analysis_tools/miniconda3/lib/python3.6/pathlib.py", line 1156, in stat
return self._accessor.stat(self)
File "/Users/kkeshava/Downloads/Analysis_tools/miniconda3/lib/python3.6/pathlib.py", line 387, in wrapped
return strfunc(str(pathobj), *args)
OSError: [Errno 62] Too many levels of symbolic links: 'Downloads/Analysis_tools/bin/grib2/jasper-1.900.1/jasper-1.900.1'
Expected outcome
Matplotlib version
- Operating system: MacOS 10.13.6
- Matplotlib version: 3.0.0
- Matplotlib backend (
print(matplotlib.get_backend())): Get the same error when I print the command - Python version: 3.6.6
Python was installed using miniconda 3 and all packages were installed from the from the conda-forge channel.