Getting an Error ValueError: Only callable can be used as callback when running the basic example

[orenkobo]

I am running the basic example:

import ruptures as rpt

# generate signal
n_samples, dim, sigma = 1000, 3, 4
n_bkps = 4  # number of breakpoints
signal, bkps = rpt.pw_constant(n_samples, dim, n_bkps, noise_std=sigma)

with version 1.17 But get an error:

File ~/venv/lib/python3.8/site-packages/ruptures/datasets/pw_constant.py:25, in pw_constant(n_samples, n_features, n_bkps, noise_std, delta, seed)
     11 """Return a piecewise constant signal and the associated changepoints.
     12 
     13 Args:
   (...)
     22     tuple: signal of shape (n_samples, n_features), list of breakpoints
     23 """
     24 # breakpoints
---> 25 bkps = draw_bkps(n_samples, n_bkps, seed=seed)
     26 # we create the signal
     27 signal = np.empty((n_samples, n_features), dtype=float)

File ~/venv/lib/python3.8/site-packages/ruptures/utils/drawbkps.py:9, in draw_bkps(n_samples, n_bkps, seed)
      6 def draw_bkps(n_samples=100, n_bkps=3, seed=None):
      7     """Draw a random partition with specified number of samples and specified
      8     number of changes."""
----> 9     rng = np.random.default_rng(seed=seed)
     10     alpha = np.ones(n_bkps + 1) / (n_bkps + 1) * 2000
     11     bkps = np.cumsum(rng.dirichlet(alpha) * n_samples).astype(int).tolist()

File _generator.pyx:4360, in numpy.random._generator.default_rng()

File _pcg64.pyx:118, in numpy.random._pcg64.PCG64.__init__()

File /Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/contextlib.py:74, in ContextDecorator.__call__.<locals>.inner(*args, **kwds)
     72 @wraps(func)
     73 def inner(*args, **kwds):
---> 74     with self._recreate_cm():
     75         return func(*args, **kwds)

File ~/venv/lib/python3.8/site-packages/numpy/core/_ufunc_config.py:436, in __enter__(self)
    434 def __exit__(self, *exc_info):
    435     seterr(**self.oldstate)
--> 436     if self.call is not _Unspecified:
    437         seterrcall(self.oldcall)

File ~/venv/lib/python3.8/site-packages/numpy/core/_ufunc_config.py:305, in seterrcall(func)
    302 if func is not None and not isinstance(func, collections.abc.Callable):
    303     if (not hasattr(func, 'write') or
    304             not isinstance(func.write, collections.abc.Callable)):
--> 305         raise ValueError("Only callable can be used as callback")
    306 pyvals = umath.geterrobj()
    307 old = geterrcall()

ValueError: Only callable can be used as callback

Any idea what I can do?

[oboulant]

Could not reproduce with

• python v3.8.10
• ruptures-1.1.7
• numpy-1.23.1
• scipy-1.9.0

Could you force a reinstall on numpy ? pip install --force-reinstall --no-cache-dir numpy

[deepcharles]

closing for now.